perm filename TELLEM[S,AIL]7 blob
sn#058522 filedate 1973-08-19 generic text, type C, neo UTF8
COMMENT ⊗ VALID 00025 PAGES
C REC PAGE DESCRIPTION
C00001 00001
C00003 00002
C00004 00003 INTRODUCTION
C00005 00004 OPTIONS
C00009 00005 PARTS LIST (see appendix II for expanded explanations)
C00014 00006 REMOVING THE FILES FROM THE DISTRIBUTION TAPE
C00015 00007 INSTALLING AN INITIAL SAIL SYSTEM
C00019 00008 MODIFYING THE COMPILER
C00023 00009
C00028 00010 NON-SHARED, NO LIBRARY RUNTIME ROUTINES {BIGRUN}
C00030 00011 RUN-TIME LIBRARY {LIB}
C00035 00012 SHARED SECOND SEGMENT EXECS {TWOSEG}
C00042 00013 OPERATING WITH SHARED SEGMENTS {TWOSEG}
C00046 00014 APPENDIX I -- SAILMAKER's CHECKLIST
C00049 00015
C00052 00016 APPENDIX II -- FILE DESCRIPTIONS
C00057 00017
C00063 00018 APPENDIX III -- REFERENCES TO OTHER USEFUL DOCUMENTATION
C00065 00019 APPENDIX IV -- THE PARSE TABLES (HEL) AND PRODUCTION COMPILER (PTRAN)
C00070 00020
C00074 00021
C00081 00022
C00084 00023
C00089 00024 APPENDIX V -- DDT AND OTHER MODIFIED DEC SOFTWARE
C00096 00025 APPENDIX VI -- ADDITIONAL SUPPORT SOFTWARE -- SCISS, MAKTAB
C00108 ENDMK
C⊗;
SAILMAKERS GUIDE
Bob Sproull
October 1970
Revised May 1971 by D. Swinehart
Revised Sept 1971 by D. Swinehart
Revised Jan 1973 by D. Swinehart and J. Low
Revised May 1973 by R. Taylor
Revised June 1973 by H. Samet
INTRODUCTION
This document describes the various parts of the SAIL system, and how
they might be combined to form many optional manifestations.
Hopefully not only the methods for installing SAIL, but the
motivations behind them will be explained.
The first sections are somewhat wordy, and describe in detail what is
going on. Later sections may be used as checklists in performing the
actual installation. Appendices follow, explaining less
commonly-needed facts.
OPTIONS
You will probably not want a system with all the available options
and configurations (especially since some are mutually exclusive). So
that you may readily ignore explanations of features you don't want,
sections which represent optional things are labelled in the
following manner:
LEAP -- this section is of interest only if you want a runtime system
with LEAP and PROCESS features. (The compiler always includes the
LEAP and PROCESS features)
It is advised that LEAP always be included as we have maintained
the system with the belief that LEAP will be around.
NOLEAP -- this section of interest only if you want one without LEAP.
TWOSEG--this section describes the sharable (2d segment) runtime
routines configuration.
NOTWOSEG -- of interest only in non-sharableconfigs etc.
LIB -- describes the process for creating the LIBSAn library.
NOLIB-- etc.
REENT -- describes the process for creating re-entrant SAIL programs,
such that not only the runtimes, but the entire user program is
sharable; and the library (HLBSAn) that goes with such programs.
BIGRUN, NOBIGRUN -- describes the process for creating RUNTIM.REL,
all runtimes, non-sharable.
GLOB, NOGLOB & GLOC, NOGLOC & EXPO-NOEXPO -- These refer to differences
between SAIL as it exists at Stanford & as it exists elsewhere. These
differences include a slightly different interface to the (non-DEC-standard)
Stanford operating system, and to the Stanford "global model", which
requires special UUOs found only at Stanford. In times past, the export
sources were modified to omit Stanford-only features. In accordance
with a new file maintainence policy, they are being left in. They certainly
will not work on a regular DEC or TENEX system, and we make no promises,
either implicit or explicit, to those who feel like monkeying around with
them. To avoid problems, leave the switch EXPORT set to 1 in file HEAD
(and don't go changing GLOCSW or GLOBSW).
When these tags appear, they will be between braces ({}) in the text.
PARTS LIST (see appendix II for expanded explanations)
A Files needed to get initial compiler and operating system going
FILES (list of files in order on tape)
TELLEM (this listing)
SAIL.REL
DDT.REL (currently can't use any configuration of DEC's DDT)
LIBSAn.REL (n, a digit.Library of runtime routines for transfer to SYS:)
BKTBL.BKT (needs to be on SYS when STDBRK is called)
2OPS2.OPS (START_CODE opcode table, created by compiling and
running MAKTAB)
PROCES.DEF (a collection of SAIL macros for use with processes)
B. Source files for SAIL compiler and execs(runtimes)
HEAD
FILSPC
E. Files to build parser tables (FAIL files for inclusion in SAIL)
FOO2
HEL
PROD.QQQ (output of PTRAN, input is HEL)
F. Source files for SAIL compiler
SAIL
PARSE
(HEL, FOO2 as comments)
PROD (output of PTRAN, input is HEL)
RESTAB (output of RTRAN, input is PROD and FOO2)
SYM
GEN
ARRAY
EXPRS
STATS
LEAP
TOTAL
PROCSS
COMSER
G. Source files for Execs
GOGOL
STRSER
IOSER
ARYSER
UP {TWOSEG}
LOW {TWOSEG}
TAILOR {TWOSEG}
LEPRUN {LEAP}
WRDGET {LEAP}
NWORLD {LEAP}
ORDER {LIB}
H. Required software support, if any modifications are to be made
FAIL.REL (a one-pass assembler)
PTRAN.SAI (creates FAIL-readable parser tables from HEL)
RTRAN.SAI (creates FAIL-readable symbol table (reserved wds) from FOO2)
(above previously HYSS and HYRS, respectively)
SCNCMD.SAI (gets REQUIRED as a source file by PTRAN and RTRAN)
WNTSLS.SAI (gets REQUIRED as a source file by PTRAN and RTRAN)
MAKTAB.SAI (creates 2OPS2.OPS)
I. Other useful files
PROFIL.SAI -- This program lists the .KNT file and .LST file, giving a
nice frequency profile of statement execution (See /K Switch in manual)
LOADER.MAC (our slightly modified version 52)
FAIL.FAI
DDT.FAI (our slightly modified version -- block structure)
CREF.MAC (modified for block structure)
SCISS.SAI (makes a a library, two-segment HLBSAn {REENT} or one-segment
LIBSAn. Uses the file ORDER as input with other exec sources)
FAIL.PMP -- FAIL assembler manual
SAIL.KVL-- SAIL manual -- restoration of these last two to DSK should
be inhibited if disk storage is scarce -- about 100K worth.
K. Some additional files of marginal usefulness. They are either documents,
or programs whose only documentation is self-contained, if at all. You
can take a look at them if you want to. They are mostly SAIL programs
and their manuals.
ARRSER,EXTEND,SRTSER,SYMSER,LP4MAT,LPDUMP,LPREAD,
CONST.HDR,CONST.SAI,MUNGE.SAI,IOMODS.SAI
ABBREV.SAI,MACROS.SAI,LEPAUX.SAI,LEPAUX.HDR
SPACE.HDR,SPACE.FAI,IOMOD.HDR,IOMOD.SAI
REMOVING THE FILES FROM THE DISTRIBUTION TAPE
A.DECTAPE
This presents no problem. The files are stored on several DECtapes
with the directories plainly listed thereon. They are stored in
standard PDP-10 DECTAPE format.
B. Mag Tape, 7 track only
Use FAILSAFE
C. Subsequent updates to the SAIL system will probably be provided
via SOUP update files, so KEEP THESE ORIGINALS, INTACT!!
INSTALLING AN INITIAL SAIL SYSTEM
The file SAIL.REL should run on any standard DEC 10/50 system of
recent (year or two) vintage. Load it with the DDT.REL provided,
and the library (LIBSAn), with the /B loader switch, using version 54
or later of the LOADER, with SAILSW and FAILSW turned on, and save it
as SAIL.SAV (one segment) somewhere. Later descriptions will indicate
a method for creating a version without DDT.
The file LIBSAn.REL is the library which is REQUIREd by all
SAIL-compiled programs. It uses a recently-installed LOADER block
type to cause the automatic search. The LOADER will look on device
SYS for this file, and will not really let you go on until such a
file is put there. The version of LIBSAn supplied should be
sufficient in all important details (at least till you get the
bootstrapping done).
If you have installed SAIL on your SYS device, CCL may be changed to
include SAIL as a standard processor by including the line
X SAIL,SAI,SAIL
in the PROCESS macro in COMPIL.MAC (DEC program). You may also
include "FAIL,FAI,FAIL" if you want to promote use of the FAIL
assembler.
To complete a SAIL system (if you're not going to investigate any of
the other, better options or make any changes), transfer 2OPS2.OPS
and BKTBL.BKT to SYS. Always load SAIL-compiled programs with
version 54 of the LOADER or later (LOADER 52 may be used if the
compiler is reassembled with the LOADVR switch in file SAIL set
to =52), with SAILSW and FAILSW turned on (or ours, which has its
points), and always use our DDT (at least until we can get together
with DEC on it).
There is one additional thing you can do if you want to -- install
the LOADER provided with SAIL. This LOADER uses the /Y switch to
make shared-segment loading more convenient (See Operating with
shared segments, below. In addition, it automatically invokes /B and
/K to cut core to reasonable sizes after loading. It is by no means
necessary to use our LOADER, though. If our LOADER is used, the
LOADVR switch in file SAIL must be set to =52 and SAIL reassembled.
MODIFYING THE COMPILER
The comments which accompany the source files are fairly extensive.
This, however, is about the only assistance you will get in
understanding the compiler, except for the Parser discussion in
appendix IV. Therefore, this section is not intended to aid in
anything but the actual mechanics (assembly, etc.) of modifying SAIL.
A. If you have only modified FAIL code, the process is fairly simple:
1. One Segment Compiler
This command string should be typed to FAIL (or the
equivalent formulation given via CCL:
SAIL←HEAD,SAIL,PARSE,HEL,FOO2,PROD,RESTAB,SYM,GEN,ARRAY,EXPRS,
STATS,LEAP,TOTAL,COMSER
SAIL.REL will be created. This version is tailored for slimness,
and is not intended to be loaded with DDT. It should be loaded
with the LIBSAn library.A typical LOADER command string is
SAIL,/LLIBSAn
2. One Segment Compiler, tailored for debugging.
This version should (sort of must) be loaded with DDT. It
contains code for the /nM options described in the SAIL manual
(and slightly better in the file PARSE just ahead of the code that
does it). With this compiler it is much easier to track down
elusive "line 99500, page 47" bugs.
The command string is the same, except that FTDEBUG should be made
1 instead of 0 (never -1, 3, or anything but 0 or 1!!!!!) in the
file SAIL (or insert a file with FTDEBUG←←1 in it ahead of SAIL).
This is the version which was sent to you as SAIL.REL.
If you do not use our LOADER remember to include the /B switch
in your LOADER string or you will get the wonderful warning:
"YOUR SYMBOLS ABOUT TO BE OBLITERATED"
everytime you run the compiler.
3. Two Segment Compiler, no debugging {TWOSEG}
Set FTDEBUG=0 in HEAD, and use the above command string,
Load without DDT, but as if it were a two-segment
SAIL-compiled program (see Two Segment operation, below). Save
in ONE segment, always (as with any SAIL-compiled job, see below).
When it runs, it will pick up the shared stuff.
4. Two segments, debugging mode Same as version 3, but make
FTDEBUG←←1, load with DDT.
B. Changes to HEL (parse table) or FOO2 (built-in procedures)
If for any reason you change either of these files, more work has
to be done:
NOTE -- PTRAN and RTRAN replace HYRS and HYSS, resp.
1. PTRAN -- Production Translator (see Appendix IV) This program
takes the pseudo Floyd-Evans productions found in file HEL (or
any other), and converts it to FAIL assembly language data
statements which define interpretation tables for the parser of
SAIL. In addition, it issues an auxilliary file containing the
names of the reserved words, for use in the RTRAN program
described below.
Compile PTRAN.SAI with your slightly used copy of SAIL, load it
and run it. It will respond with a `*', to which you should
counter: PROD←HEL<cr>. When another `*' appears, PROD and
PROD.QQQ have been created. PROD is the parse table (HEL is
included only as a comment in the assembly above, as is FOO2).
PROD.QQQ is the list of reserved words for RTRAN.
2. RTRAN -- Reserved Word Translator
This program issues FAIL source code which defines the initial
configuration of the SAIL internal symbol table, for the reserved
words like BEGIN and END, and for the execution routines like
INPUT, BREAKSET, etc. Input for the reserved words comes from
PROD.QQQ via PTRAN. Input for the executions is from the file
FOO2. Appendix IV describes the formats of these files in detail.
The command string is: RESTAB←PROD,FOO2<cr>. The resultant
RESTAB is the initial symbol table, expressed in FAIL.
Now proceed as given in part A.
PTRAN will read commands from nnnPTR.TMP if started in CCL mode.
RTRAN will read from nnnRTR.TMP. Make what you like of that.
C. Some particularly interesting conditional assembly switches
FTDEBUG -- 1 for debug/mode, 0 for non-debug mode, as above.
LEAPSW {LEAP} -- on for LEAP features in runtimes (standard), off
otherwise.
RENSW -- usually 1 -- on if compiler is to be capable of generating
re-entrant (two-segment) code. To get it to do that, use /H in the
command string. Such a file will REQUIRE the HLBSAn library, each
file of which has been HISEGed (see below). Most of the program
can thus be shared, if the program has reached CUSP status.
SIXSW -- turn this on if you use sixbit project-programmer numbers.
Otherwise, SAIL assumes octal ones. Examine all SIXSW-dependent
code if you use something else entirely, and make changes.
TMPCSW -- turn this off if your system does not support the TEMPCOR
UUO.
LOADVR -- the decimal value of the loader version to be used;
=52 or >=52, typically - loader block type problems.
NON-SHARED, NO LIBRARY RUNTIME ROUTINES {BIGRUN}
The files GOGOL, STRSER, IOSER, ARYSER, NWORLD, LEPRUN and WRDGET,
along with the macro and accumulator definition file HEAD, were
historically assembled in the order
HEAD,GOGOL,STRSER,IOSER,ARYSER,NWORLD,LEPRUN,WRDGET
to create a file RUNTIM.REL which contained the storage allocator,
the initializer, the string garbage collector, and all the execution
routines (INPUT, BREAKSET, concatenation, CVS, LEAP, etc.).
This method may still be used. Simply assemble the files given
above, in the order specified. Specify RUNTIM.REL, or anything
else, for that matter, as the binary file. This file, loaded
with a SAIL-compiled program, will provide all the support necessary.
Unfortunately, it is about 9.5K long.
RUN-TIME LIBRARY {LIB}
We found that out. However, the obvious solution to the large
execution package revealed some drawbacks. We wanted to create a
library for SAIL in the manner of the FORTRAN library. However,
given the DEC library file conventions, each separately-loadable
entry would have to be assembled separately. This was not so bad,
but it would mean fragmenting GOGOL and friends into many parts,
making the creation of RUNTIM.REL or the shared segment version hard.
It was crucial that there not be multiple copies of the same
routines, because maintenance of one set is hard enough.......
The current solution to the problem is the program SCISS.SAI, some
special macro constructs in GOGOL and friends, and a lot of luck.
SCISS operates in two passes, with a pass of FAIL between. On the
first pass, it extracts from HEAD and GOGOL some common code used by
all library entries (making HDRFIL.FAI, or some such). Then it
writes one FAIL source file for each desired library entry,
extracting its code from the file GOGOL, STRSER, or IOSER etc.in
which it appears (removing comments and blank lines), naming each
after its library entry. In addition, it writes a command file
(CCL file) to FAIL, then chains to FAIL. The file ORDER contains the
correspondence between library entries and the source files as well
as "n" the version of the library.
FAIL assembles all the little FAIL files, each preceded by HDRFIL,
into little .REL files, chaining back to SCISS, this time in CCL mode,
thus indicating pass 2. On pass 2, SCISS copies all the .REL files
into LIBSAn.REL, removing local symbols and cleaning things up. All
the FAIL and .REL files, along with the HDRFIL and CCL files, are
deleted if desired.
Here we will only discuss the STANDARD case. The procedure is:
Read into GOGOL, looking for the COMPILE macro, the ENDCOM macro.
Also look at the file ORDER. These should give you an idea of what
is going on inside to give SCISS a hand.
Compile and load SCISS.SAI, and save it as SCISS.SAV on the area on
which you intend to run it.
Run SCISS. It will read the file ORDER (from the current area) as
input. When it asks "STANDARD? ", answer "Y<cr>". It will
chatter for some time about what it intends to do, then about what it
is doing. Thereafter, FAIL will be invoked to compile all the little
files. Finally SCISS will return with "STANDARD? ". Answer Yes
again. It will drone on some more about the files it is deleting and
copying. Finally it will report that LIBSAn.REL exists for the
using.
{REENT}
Use an option of SCISS (see appendix VI) to get the high segment
library (HLBSAn). Programs compiled with /H will use HLBSAn -- others
will use the shared segment (see {TWOSEG} below) or LIBSAn. You
should create only a LIBSAn if you don't make a /H-type compiler
(RENSW off in SAIL) when you assemble it.
If anything goes wrong, you will probably profit from the more
complete discussion of SCISS in appendix VI.
SHARED SECOND SEGMENT EXECS {TWOSEG}
This option represents the latest step in the evolution of these
things. In this version, we are back to the 9.5K runtime package, but
this time it occupies the (entire) second segment of any number of
jobs. Linkage to routines in this segment is accomplished at LOADER
time by loading as the FIRST THING a file containing the name of a
particular upper segment, as well as symbol names and locations for
that upper segment's routines. In addition, this file contains some
impure data for the SAIL job, along with the UUO trap locations and
the code necessary to attach via GETSEG to the specified segment.
In this way the upper and lower files are keyed to each other, and as
long as standard naming conventions are followed, an old .SAV file,
when run, will never link to a new segment with unmatching addresses.
A transfer vector in the upper segment, through which all calls to
runtime routines go, also minimizes this possibility of dissynchroni-
zation.
To create one of these clever beasts, first look at the file FILSPC.
It contains default values for this lower segment name (SAILOW,
typically), the current upper segment name (SAISGn, n a digit) which
will be unique to this particular manifestation (or at least should
change when the transfer vector changes), and some parameters which
are probably meaningless in your installation, and should be left as
they are. In addition, the device (DSK or SYS) and PPN pair where
the segment file will be found is also defined therein. Thus
SAISGn.SHR is one file which need not reside on SYS.
Once you are satisfied that FILSPC is OK (modification should include
noting on page 2 the date, the version number if you must, and what
glorious changes warrant the new version), Use FAIL on the command
string:
LOWER←HEAD,FILSPC,LOW,GOGOL,STRSER,IOSER,ARYSER,NWORLD
LOWER.REL will be a binary file containing the desired upper segment
name and location (for use by the GETSEG routine), and the lower-
segment initialization and impure code, selected from GOGOL by the
conditional assembly in LOW.
Now use FAIL to assemble:
TAILOR←HEAD,FILSPC,TAILOR (or the CCL equivalent, of course).
TAILOR.REL contains the upper segment name and location, along with
the other useless parameters from FILSPC, this time in core locations
rather than as assembly constants. This could have been included in
the next assembly, but wasn't so that the names and other things
could be changed without re-assembling the body of the segment code.
The last assembly is:
UPPER←HEAD,UP,ORDER,GOGOL,STRSER,IOSER,ARYSER,NWORLD,LEPRUN,WRDGET
UPPER.REL contains, after some initial messing around, code PHASEd to
400000 and succeeding locations, so that when it is fetched as an
upper segment, it will be able to run there. The trick is to get it
written out such that this can be done. Some of that which follows
may look ridiculous and overly complex to some of you, but remember
that the code, with modifications, must also be used at Stanford,
where things are done that way.
First load TAILOR and UPPER together. This tells UPPER what its name
will be. There is code in UP, before the phase, and to which the
starting address of the UPPER assembly refers, which will now perform
some contortions:
Start the resultant core image. The code in UP will first write out
pure segment code onto the file SAISGn.SHR ON THE CURRENT DIRECTORY
AREA, notwithstanding its ultimate destination. Then it will copy
LOWER.REL to SAILOW.REL (or whatever FILSPC says), imbedding in
SAILOW , in LOADER INTERNAL symbol format, the symbol names and upper
segment addresses for all the runtime routines and other data which
SAIL programs must reference. These symbols are taken directly from
the current core image's symbol table, which contains all the symbols
and their values, because the UPPER file was loaded with it.
SAILOW.REL and SAISGn.SHR should be copied to their intended
destinations (usually SYS).
OPERATING WITH SHARED SEGMENTS {TWOSEG}
To create a core image which will use the shared SAISGn segment,
whether it be the compiler (see above sections) or a SAIL-compiled
program, simply load it with the most recent SAILOW.REL as the VERY
FIRST THING (locations 140 cc.) in the core image. SAISGn KNOWS that
certain data in SAILOW will be at these locations. SAILOW, in turn,
"knows", via the implanted symbols, where the runtime routines for
the SAISGn keyed to it are. Therefore, all references to runtime
routines in the files loaded after SAILOW will be properly resolved
to upper segment addresses.
After loading SAILOW, DDT can be loaded if desired, followed by any
SAIL-compiled or FAIL/MACRO/FORTRAN-processed files. When the job
(which should have a SAIL main program) is started, it will do a
GETSEG on the appropriate SAISGn.SHR, and you will be in business.
Leave old versions of SAISGn's (where the n's differ) around, so that
old .SAV files will still work. In general, you should save core
images BEFORE running them the first time. Otherwise, you will
probably save your own copy of the segment and stuff like that. It
is not really a problem here, because our system's different; so I
don't really know what problems you'll encounter.
Our LOADER contains the /Y switch, causing SYS:SAILOW to be loaded
immediately after the /Y has been scanned. In addition, our CCL will
look for .SAI extensions on any of its inputs, and will put out a /Y
first thing (even before /D if debugging, etc.) if it sees any. In
the near future, we will probably remove the /Y business, and let CCL
insert the SYS:SAILOW directly-- under a previous, more complicated
scheme, the /Y stuff made more sense.
That should do it. The LOWER, UPPER, and TAILOR .REL files can be
deleted as soon as SAILOW and SAISGn have been made -- they are
purely intermediate entities.
APPENDIX I -- SAILMAKER's CHECKLIST
A. Getting files from MTA
( )1. Use FAILSAFE.
B. Getting a SAIL system up
( )1. Load the SAIL.REL,/BDDT.REL,/LLIBSAn provided with our LOADER
or with any version 54 or later LOADER with FAILSW and SAILSW
turned on.
( )2. Save as SAIL.SAV or something in a convenient place.
( )3. Transfer LIBSAn.REL, 2OPS2.OPS, PROCES.DEF, and BKTBL.BKT to SYS --
also SAIL, and/or FAIL, and/or LOADER, and/or DDT, if desired.
C. Changing the productions (HEL) or built-in descriptions (FOO2)
( )1. Make the appropriate edits
( )2. Compile PTRAN.SAI, RTRAN.SAI (require SCNCMD,WNTSLS as source
files)
( )3. Load and run PTRAN (formerly HYRS).
Command string is PROD←HEL<cr>.
( )4. Load and run RTRAN (formerly HYSS).
Command string is RESTAB←PROD,FOO2<cr>.
5. Do one of parts D, E, F, or G.
D. Assembling Two-segment, no debugging compiler
( )1. Assemble with FAIL:
SAIL←HEAD,SAIL,PARSE,HEL,FOO2,PROD,RESTAB,SYM,GEN,ARRAY,EXPRS,
STATS,LEAP,TOTAL,PROCSS,COMSER
2. Load SAILOW,SAIL without DDT.
E. Assembling Two-segment, debugging compiler
( )1. Change FTDEBUG in SAIL to 1, or insert a file ahead of SAIL
in the command string below (DB, say), with FTDEBUG a 1.
( )2. Assemble with FAIL:
SAIL←HEAD,DB,SAIL,....
3. Load as in part D with DDT
F. Assembling a One-segment, no debugging compiler
( )1. Assemble as in part D
2. Load as in part B without DDT
G. Assembling a One-segment, debugging compiler
1. Guess.
H. Assembling a great big RUNTIM.REL
( )1. Assemble with FAIL:
RUNTIM←HEAD,GOGOL,STRSER,IOSER,ARYSER,NWORLD,LEPRUN,WRDGET
2. Load SAIL programs with RUNTIM.
I. Creating a standard LIBSAn.REL
( )1. Compile and load SCISS.SAI
( )2. Save as SCISS.SAV
( )4. Run SCISS. Reply Y<cr> to all questions.
( )5. After much typeout, it should report that LIBSAn.REL exists
so put it where you like, preferably on SYS.
( )6. {REENT}For creation of HLBSAn see Appendix VI
7. If you get in trouble, Appendix VI may provide some shortcuts
for getting out of it.
J. Creating shared segments
( )1. Modify FILSPC to taste
( )2. Assemble LOWER←HEAD,FILSPC,LOW,GOGOL,STRSER,IOSER,ARYSER,NWORLD
( )3. Assemble TAILOR←HEAD,FILSPC,TAILOR
( )4. Assemble UPPER←HEAD,UP,GOGOL,STRSER,IOSER,ARYSER,
NWORLD,LEPRUN,WRDGET
( )5. Load TAILOR and UPPER with a SAIL-compatible LOADER
( )6. Run result, getting SAILOW.REL and SAISGn.SHR
( )7. Transfer SAILOW to SYS, SAISGn.SHR to wherever FILSPC says.
K. Running with shared segments
( )1. Load SAILOW.REL FIRST!!!!!
( )2. Load DDT and programs
( )3. Start job -- segment will hook up right away.
L. {REENT} Running with 2-segment programs (/H when compiling)
( )1. Compile with /H in command string
( )2. Load as usual (DO NOT LOAD SAILOW AT ALL)
3. The HLBSAn library will provide al(most al)l high-segment
routines.
APPENDIX II -- FILE DESCRIPTIONS
A. SAIL COMPILER:
HEAD
-- a definition file, defines useful macros, accumulators etc. There
are also definitions for the "user table", the table of good stuff
which contains the non-reentrant information for use by runtime
routines.
SAIL
-- initializer for the compiler, command line scanner. Almost all
the CCL code is in here.
PARSE
-- The syntax interpreter, the debugging routines (for looking at the
parse stack, symbol table entries, etc.)
HEL
-- This is the file which contains the "english" of the productions
for SAIL. It is included in the SAIL assembly as a comment. The
actual production interpreter tables are generated from it by the
program PTRAN, which uses this file (HEL) as source, and dumps its
output into PROD.
FOO2
-- Again included in the assembly as a comment. This is the
"english" specification of the pre-defined procedures. These are all
the procedures available at runtime.
PROD
-- Syntax tables, generated by PTRAN.
RESTAB
-- Reserved word tables and pre-defined procedure tables, generated
by the program RTRAN, with FOO2 and PROD as input.
SYM
-- This is the scanner. This has the code for inputting from source
files, producing a listing, expanding macros, looking up symbols,
entering symbols, and delivering and reclaiming symbol table blocks.
GEN
-- This is the first part of the generators. Contains code for
initialization, declarations, storage allocation in object program,
inline code, syntax error messages, etc.
ARRAY
-- Contains generators for array references.
EXPRS
-- Generators for expressions -- arithmetic, string, boolean,
assignment statements.
STATS
-- Generators for statements: LOOP constructs, procedure
declarations, etc.
LEAP
-- Generators for LEAP, backtracking and procedure items.
PROCSS
-- Generators for process,coroutine, event constructs.
TOTAL
-- This file contains the generator subroutines used for type
conversion, accumulator management, binary file output, symbol
output, and miscellaneous other things.
COMSER
-- Random service routines for the compiler (e.g. some string garbage
collector goodies).
SAIL RUNTIME:
GOGOL
-- Contains most of the runtime environment stuff (also compile
time). Core allocation, UUO handler, string garbage collector,
allocation (i.e. of stacks, string space) stuff.
STRSER
-- Contains most of the string handling routines such as
concatenation, substring, etc.
IOSER
-- Contains runtime routines for doing I/O a few other things.
ARYSER
-- Contains runtime routines for doing array allocation & deallocation,
run time "go to solving", and the apply construct.
NWORLD
-- Contains runtime routines for process handling
LEPRUN
-- Runtime routines for LEAP.
WRDGET
-- Contains one-word,two-word and string descriptor providers, as well
as REMEMBER, FORGET and RESTORE routines.
UP, LOW, TAILOR, FILSPC
-- Files used for making shareable runtime routines.
SAIL SERVICE:
PTRAN.SAI
-- SAIL program for compiling syntax tables (see description below).
RTRAN.SAI
-- SAIL program for compiling tables for reserved word definitions
and pre-declared procedure definitions.
SCNCMD,WNTSLS
-- SAIL sourcefiles required by PTRAN and RTRAN.
MAKTAB.SAI
-- SAIL program to write the file 2OPS2.OPS, which contains op-code
definitions for the inline code generators (START_CODE).
NON-TEXT FILES -- TO HELP YOU GET SAIL UP FAST:
SAIL.REL
-- An assembled version of SAIL, with FTDEBUG set (i.e. you must load
it with DDT). If you are able to assemble your own .REL of SAIL, you
can save considerable space by turning FTDEBUG off.
LIBSAn.REL
-- A good library file.
BKTBL.BKT
-- The specification file for the STDBRK function.
2OPS2.OPS
-- The inline code opcode table. Make a new one with MAKTAB.SAI.
PROCES.DEF
-- A set of useful macros which a multiple process programmer may
require as a source file.
OTHER SYSTEM PROGRAMS:
FAIL and FAIL.REL
-- This is the assembler which will assemble all of the SAIL compiler
and runtime text files mentioned above. There may be some trouble
getting this to run on your system. If so, I suggest loading FAIL
with our DDT and looking around. Common problems are with the APRENB
code. FAIL asks for interrupts on ILL MEM REF so that it can assign
more core, link up free storage, etc. If you get an ILL MEM REF
message on your console while running FAIL, something is wrong:
either your system (this has been known to happen with APRENB) or
FAIL (there is a rumor that APRENB must be called after each trap).
LOADER
-- This loader is set up for SAIL, and contains the /Y (two segment,
see above) option. It can be loaded by almost any previous loader.
If you have V52 or later, and don't need /Y, just use your own (con-
figured for SAIL and FAIL, of course (of course!). Our LOADER is set
up also to provide the /B and /K features automatically, the desired
state for programs with SAIL stuff in them.
DDT and DDT.REL
-- This is an improved DDT, and you might as well put it up on your
system. There are many new features (see description below).
CREF.MAC
-- This is the cross-reference program which works for FAIL and SAIL.
(There are bugs in the SAIL compiler output of CREF information --
wrong block names sometimes happen -- we will fix it sometime, but it
didn't seem like the most important thing in the world, also conditional
compilation is known to put out incorrect listing files).
SCISS.SAI
-- This program creates the LIBSAn and HLBSAn libraries, as described
in varying degrees of detail in other parts of this document.
PROFIL.SAI
-- This program is applied to a SAIL listing file (with /K option) and
a .KNT file created by a program which was compiled using /K, as
described in the SAIL manual, to create a "program profile" listing.
FAIL.ON, SAIL.DOC
The complete FAIL manual, and the
complete SAIL manual -- of little use to you if you don't have a lower-
case printer, probably. They're big, so keep them off the disk unless
you have plenty of room.
OTHERS
These are stored after the EOT marks on the tape. The section on getting
started describes how to get them off. Take a look at them if you like
and decide whether they might be useful to you. Otherwise forget them.
APPENDIX III -- REFERENCES TO OTHER USEFUL DOCUMENTATION
A. See HEAD for complete description of conditional assembly
switches, the macros which simplify their use, and the files
in which they are defined.
B. See SAIL for a complete listing of FAIL commands for creating
various kinds of compilers (slightly invalid for non-Stanford
systems).
C. See GOGOL for a complete listing of FAIL commands for creating
various kinds of runtime routines, libraries, etc. -- also for
the COMPIL, ENDCOM, and ORDER constructs used by SCISS -- lastly
for the usage of the HERE macro to conveniently create the upper
segment transfer vector (HERE may be defined in HEAD).
D. See PARSE for a complete description of the features of the
debugging versions of the compiler -- features generally useful
only to the maintainers of SAIL.
E. See NEWMAN for recent changes to the language.
APPENDIX IV -- THE PARSE TABLES (HEL) AND PRODUCTION COMPILER (PTRAN)
The program PTRAN expects an input file of a very special
format. The ultimate aim of this input file is to specify a sequence
of productions, but we must first specify the production alphabet,
both terminal and non-terminal.
The meta language for specifying productions consumes a few symbols
and conventions. First, all alphabetic characters in the input file
must be in upper case. The only delimiters are space and tab, so →AG
does NOT get interpreted as two separate symbols.
1. For various undisclosed reasons, we must first provide
alternate "names" for all single-letter delimiters we may need, such
as ( ) } ↑ [ ], etc. The pseudo-op <SYMBOLS> is given, followed by
pairs of
single-letter-delimiter crazy-alternate-name
See the example below for some instances of this phenomenon. The
crazier the name the better. This is so that the symbols can be
included in the scanner table. Note the interaction with these
aliases and the reserved word scheme. Thus ≡ which is the same as EQV
is equivalenced by this scheme.
2. The terminal symbols of the language are then specfied in two
groups: first, those which the scanner knows about directly, and
second, the group of reserved words in the language (these look like
identifiers to the scanner, but you obviously desire a special
interpretation). The first group is initiated with the pseudo-op
<TERMINALS>, and must include all the single-letter-delimiters cited
in 1 which do not have reserved word equivalents. The second group is
started with <RESERVED-WORDS>, and is merely a list of all the
reserved words you desire.
3. The non-terminal symbols are then declared. These are things
which you may want to put on the stack as "markers" of partially
completed reductions. The pseudo-op <NON-TERMINAL-SYMBOLS> is
followed by a list of such symbols.
4. For efficiency reasons, it is helpful to define CLASSES of
symbols. Then with one production, we can determine if a whole class
of productions are applicable, and we can often avoid stating all the
productions. To specify classes, we start with the pseudo-op
<CLASSES>, and then, on a one-class-to-a-line basis, we specify:
class-name class-element class-element ....
where class-name must begin with a @. All of the class-elements must
have already been defined in 2 or 3 above or a previously defined
class-name. Note that two classes are predeclared. These are RESERVED
which contains all the reserved words and TERMINAL which contains all
the terminal symbols.
5. Finally we are ready to state the productions. We give the
pseudo-op <PRODUCTIONS> to start this off. The name of the first
production is BB0 (this may be changed by altering the contents of
the cell PRODGO in file PARSE).
The interpreter will start AFTER ONE SCAN, so that the top of the
stack will already have the first "parse token" on it.
The syntax of each production is:
label: LHS →→ RHS EXEC xxx SCAN α ¬yyy #zzz ↓↓ ↑www
This specifies a production. These symbols need at least some
explanation:
-- the label is the production "name". It is optional. All labels in
the program must be unique in their first 6 characters. There
may not be a space between the label and the :.
(If you plan to use the debugger (FTDEBUG← 1) it is advisable
to have only 3 character label names to avoid spurious
production breaks).
-- LHS is a left-hand-side-list. That is, a list of symbols declared
in 2,3, or 4 above which is to be matched against the current
top elements of the stack.
-- RHS is a right-hand-side-list. This is the list of symbols which
will replace the LHS on the stack if the production succeeds.
-- EXEC specifies that a list of execs is to be called. The names
you give in this list of exec routines should be the names
of the procedures that you make up in your exec routine file.
-- SCAN specifies that we are to scan before going on to the next
production.
-- the # ¬ ↑ and ↓↓ parts specify where "control" of the production
interpreter is to go.
The following things are omittable:
-- the label
-- the →→ and right-hand-side-list, in which case it is assumed that
if the production succeeds, the stack is restored to its
original condition.
-- the right-hand-side-list, in which case nothing is restored to the
stack.
-- EXEC and the list of exec routines which follows it.
-- SCAN if you do not want to scan. Note that SCAN α means scan α
times before going to the success spot.
-- the #zzz, ↓↓, and/or ↑www may be omitted.
Now for the interpretation. When the interpreter is pointed at this
production, the stack is compared against the left-hand-side-list.
The last element in this list is compared against the current top of
the stack, and so on back the list and up the stack. Compares are
equal if:
-- the symbols actually match.
-- the list element in the left-hand-side is SG, which stands for
sigma, and compares equal to anything. SG is thus a meta
symbol of the production compiler, and may not be used in any
other way. In fact, any identifier beginning with SG is a
"sigma". For the purposes of stack restoring, however, SG1
matches only SG1, etc.
-- the list element in the left-hand-side is a class symbol and the
corresponding stack element belongs to that class. If the
left-hand-side-list fails to match the top positions of the
stack, the production interpreter sees a failure and goes to
another production. The next production is normally the one
following the one which failed. If you want to specify some
other failure production, the #zzz construct is used, where
zzz is the label of the production you want to go to.
If the left-hand-side-list matches the top of the stack, then:
1. These stack elements are popped off the stack temporarily.
2. If any exec routines have been specified, these are called. The
statement EXEC FOOBAZ causes the subroutine called FOOBAZ to
be called. The statement EXEC @DCL FOOBAZ causes the
following to happen: FOOBAZ is a routine which wants to know
some class information about one of the left-hand-side
elements. This element is specified by the @DCL (this was
the same thing that occurred on the left-hand-side). Just how
this class information is passed is not important here. Upon
return from all exec routines, we continue to:
3. The stack is then fixed back up, reflecting any changes as
specified in the right-hand-side-list.
4. The scanner is called if SCAN was specified.
5. The production has now "succeeded". We must cast around for the
next production. Each production must have some
specification of what to do on success. If you only
specified a ¬yyy , then we do a "jump" to the production with
label yyy. If you specified a ↑aaa and a ¬yyy , we do a "push
jump" to production aaa. When we return from that
"subroutine," we will go to production yyy. The "pop jump"
is specified by ↓↓. It makes no sense to say: ¬aaa ↓↓ since
these two operations conflict (in fact, the pop jump will
take precedence).
6. An extension has been made to production language to enable the
implementation of conditional compilation in SAIL. This consists of
maintaining two parser stacks. When certain reserved words such as
IFC are seen a "push jump" is done to a production which is accessed
by an index to a table via the left hand entry of the words symbol
table semantic entry. Parsing then continues in a coroutine-like
manner. The PRESUME construct has been added to production language
to facilitate a change in the current parser stack from conditional
compilation to SAIL-like compilation. Coroutine-like parser stack
switches from SAIL to conditional compilation is done when certain
reserved words are seen such as ELSEC. A PRESUME followed by ↓↓
indicates that the conditional compilation process is finished. Also
note that when DEFINE is seen, it is treated in the same way as IFC
with the exception that there is no need for an additional stack.
If you do not understand all this don't worry, you are in good
company.
The list of productions must be followed by the pseudo-op <END>
There is a facility for passing class-type information to exec
routines. The SAIL production interpreter stores a number in
accumulator number 2 before executing the exec routine that you
specified. This number contains the type information you need. The
problem of interpreting that number is complicated but not
impossible. The elementary statement is: the number is the index
(starting at 0) into the line of symbols in which that class type is
declared. So if you declare the class type
@DCL INTEGER REAL BOOLEAN COMPLEX STRING
and if you wrote a production
%CON: @DCL IDENT , →→ @DCL EXEC @DCL ENTID SCAN 2 ¬%CON
then when ENTID is called, AC 2 will contain the following numbers:
parse token which compared
equal to @DCL
INTEGER 0
REAL 1
BOOLEAN 2
COMPLEX 3
STRING 4
This simple explanation breaks down when, say BOOLEAN was declared to
be a member of another class, and THAT CLASS WAS DECLARED BEFORE @DCL
WAS. So the easy rule is: declare the classes that will be required
to provide class information to semantic routines first, and then
those classes which are used only for parsing purposes.
Numerical parameters can also be passed to exec routines. This is
done in the same manner as parsing class-type information. The only
difference being that the @ symbol is followed by an integer instead
of a class name.
III. Pre-loaded symbol table input format (program RTRAN).
This file obeys many of the same conventions as HEL (no lower case,
delimiters are only space and tab, comment operator is MUMBLE,
etc.). Don't play with <ASSIGN> or <DEFINITIONS> unless you have
become a real wizard. There isn't much content there anyway.
The functions are all listed with their parameter types. There is
no special order, except that the first function is the default
program block. Hence, the default program name is M. I suggest
leaving this as is.
A function description is: (1) the first line has the function name
(this is what will go out to the loader as an external request)
followed by the value that the function returns. UNTYPE means it is
a procedure and not a function (other types are specified by the
names of the semantic bits for them) followed by some bits
specifying to the compiler how to interpret the rest of the symbol
table entry. OWN absolutely MUST be cited. Reserved-functions are
stored in a compact way, and OWN specifes this special packing.
BILTIN is specified if the function will save accumulators (except
the result ac if any) over the function call. Most of these
routines do save accumulators, but for a special case, consider
INPUT. The integers BREAK and EOF referred to in the call on OPEN
to open the channel may be changed by a call to INPUT. If copies of
these integers were thought by the compiler to be in the ac's at the
time, disaster would (and did!) strike. The last thing on the first
line is the number of parameters to the procedure. Then (2) come the
parameters, one to a line. There are four elements to a parameter
description: (1) a "type" of the parameter, an artifact left over
from an earlier scheme, and ignored by RTRAN, (2) an optional
comment about what the parameter is -- must be a single word (no
spaces or tabs) surrounded by ( ). Then (3,4) come the right and
left halves of the semantic word to specify what type of parameter
we have. Things here are pretty obvious except for one particular
feature -- reference parameters may have many types. If the routine
really only needs an address (ARRTRAN,ARRBLT, etc.) we don't care
what type (INTEGER,REAL, etc) the parameter had. So in this case,
the actual-formal match is made with the condition: "any bit which
is on in the actual must be on in the description of the formal,"
with the exception that if one is an array (SBSCRP) they both must
be. There is one other feature that may be useful. If a "$" is
placed before field (3), then the parameter may be "defaulted" to
its null value (ie integers to zero, itemvars to BINDIT, etc) if the
actual call omits this actual parameter. Such defaultable parameters
must come at the end of the argument list and must be value
parameters.
APPENDIX V -- DDT AND OTHER MODIFIED DEC SOFTWARE
A. DDT
To name the program, type name$: ($ stands for altmode). To get
inside a "block", type blockname$& . If you want to name a symbol in
another block without permanently entering that block (as above) type
block&symbol .
The following changes have been made to DDT:
1. Halfword printout is now of the form A,,B instead of (A)B.
Either form may be used on input. The difference is that A,,B
truncates A to 18 bits before swapping halves while (A)B does not.
2. $U is a new output mode. It is the same as $A$H.
3. $F mode will now print normalized floating permit numbers as
decimal integers. This means that FORTRAN users may, in general, use
$F to look at all variables and they will be printed correctly either
fixed or floating.
4. If the address of a string of ASCIZ text is placed in $nB+3, then
whenever breakpoint n is reached, DDT will act as if the characters
in the string were being read from the teletype. If you are
preparing such a string in advance use either $ or ≠ (≠33 octal) for
altmode.
5. If a bytepointer to an asciz string is placed in $M-l, DDT will
act as if the characters in the string are being read from the
teletype.
6. $$7" <delimiter> characters <delimiter> will act just like an
asciz statement in MACRO or FAIL,i.e., more than one word will be
filled with asciz for the characters if necessary. $$" will have a
similar effect but with sixbit.
7. Typing <number>$$P will cause DDT to do an automatic proceed
<number> times instead of forever.
8. When printing in $$S mode, no word will be printed out as an I/O
instruction (CONO, DATAO, CONI, etc.) unless the device number is in
a special table. The table is 10 words long and is in $I-1, $I-2,
etc. Simply put device number here to have the appropriate I/O
instructions printed.
9. If an address is placed in $M-2 then for each character DDT
wishes to output, a pushj 1,@$M-2 will be executed. This allows
output to be redirected to some device other than the TTY. The
character is in register 5. The routine should preserve all AC's and
end with a POPJ l,.
10. In byte mode output ($<number>0), if a size of 0 is specified,
DDT will use a special mark in $M+2. The boundry between 1 and 0 bits
specifies the size of the bytes. For example, a word containing
11111111111 00000000000 11100010110001
would print 2 . 11 bit bytes, 2 3 bit bytes, 2 1 bit bytes, a 2 bit
bytes, a 3 bit byte, and a 1 bit byte.
11. Bytes may be input of $<number>%. This should be followed by a
by an altmode. If number of bytes in a word is not integral the last
byte is treated as if the word were larger (bit number greater than
35). This makes input compatible with output. A size of O uses the
mark in $M+2 as above.
12. It is now possible to print flag words and T type instructions
(TRNN, TLNN, etc.) with suitable names for the bit involved. In $M+3
a pointer of the following form is placed:
T0: -------------
| |
------------- | |
$M+3 | L1 | T0 | | Table 0 |
------------- | |
-------------
L1: L2,,T1 -------------
| |
| Table 1 |
| |
-------------
L2: 0,,T2 -------------
| |
| Table 2 |
| |
-------------
As many tables as desired may be included. The pointer to the last
table should have 0 in the left half. Each table contains 36 words.
The nth word contains the RADIX50 for the name of bit n. $<number>J
mode will cause a word to be printed out using the bit names in table
number. If an entry for a bit is 0, the numeric value will be
printed. A typical word might look like
foo! baz! 123,, fool! garp! 2
$J means $0J. $nL causes the left half to be printed in symbolic and
the right half to be printed in this bit mode, using the left-half
bits. This is for printing out the instructions like TLNN,TLO,TLZ,
etc. The corresponding command for TRNN,TRO,TRZ etc is $V. Needless
to say, the instructions do not have to be TRNN, TLNN etc., but may
be anything.
APPENDIX VI -- ADDITIONAL SUPPORT SOFTWARE -- SCISS, MAKTAB
A. SCISS
This description attempts to give a complete description of the
possible modes of operation of SCISS. It answers the pressing
question: What happens if I reply NO to the "STANDARD? " query.
Here's what happens --
1. The file ORDER consists of a comment (thus ignored by FAIL) of the
form:
COMMENT ⊗
NAM,5
ALL,HEAD,!GOGOL
HDR, GOGOL
LOR,LUP,KNT...
...
⊗
SCISS reads it to find the version number of the library
(the digit following "NAM," and the list of all possible library
entries. It creates files of the form SAILOR, SAISGC, .... when
operating. The SAILOR... form is the one you should use in
communicating with SCISS.
NOTE: if you change the version number of the library, be sure to
also change the library names accordingly in FILSPC so that the
compiler will generate library request for the current version of the
library.
2. The COMPIL macro has as arguments, among others, the name of the
individual entry (3 letters, like LOR), the list of ENTRIES to be
issued when in LIBRARY mode, any EXTERNALS and INTERNALS to be
issued, and a short description. When not in library mode,this macro
simply issues the ENTRY and INTERNAL lists as INTERNALS, and issues
the EXTERNALS. When SCISS encounters it, it compares the name of the
entry with the list of those selected to be assembled this run. If
the name matches an entry, it writes a file SAIccc.FAI, with all the
code between the COMPIL and the matching ENDCOM (which expands in
this case to END) in it. COMPIL in this mode will expand when
assembled into the appropriate ENTRYs, TITLEs, etc. Notice that
there is a COMPIL macro for each possible library entry, and an entry
in the ORDER list for every instance of COMPIL. Thus the standard
case, which uses the whole ORDER list, makes the largest possible
library.
3. SCISS will ask the question "STANDARD?" before PASS 1 and before
PASS2 (unless PASS 1 was totally suppressed). To get the standard
LIBSAn simply reply Y<cr> to both questions. Otherwise type N<cr> and
then you will get a list of options.
PASS 1
1 PASS 2 NOW
2 DON'T CHAIN TO FAIL
3 DON'T CREATE INTERMEDIATE FILES
4 MAKE REENTRANT LIBRARY
5 SELECT ENTRIES FROM PROMPT-LIST
6 SPECIFY ENTRIES EXPLICITLY
7 DON'T DELETE INTERMEDIATE FILES (PASS 2)
8 DON'T MAKE A LIBRARY(PASS 2)
Type the indices of those options you wish to invoke:
1. PASS 2 NOW means don't create the SAIxxx.FAI files or call FAIL.
This makes sense only if SCISS has been run before and the SAIxxx.REL
files still exist. This option will cause the copying of the .REL
files (which ones, may be specified by invoking options 5 or 6) to
form a library (unless inhibited by option 8) and then deleting the
.FAI and .REL files (unless inhibited by option 7). The library will
be named HLBSAn if option 4 is requested (The .REL files should have
been created by running SCISS with a REENTRANT library requested
during the first pass).
2. DON'T CHAIN TO FAIL means just create the .FAI files. Don't
assemble them.
3. DON'T CREATE INTERMEDIATE FILES. Don't create the .FAI files but
unless inhibited assemble the .FAI files generated previously.
4. MAKE REENTRANT LIBRARY means to make a HLBSAn instead of a LIBSAn.
(command must be given to both PASS 1 and PASS 2)
5. SELECT ENTRIES FROM PROMPT-LIST means that SCISS will type the
library entries and let you indicate whether you desire that entry in
the library. This option and the next are very useful in avoiding
reassembling everything when an assembly error has occurred in one or
two library entries. SCISS will type the names of the library entries
like SAICOR, pausing for your response:
Y<cr> retain this entry
N<cr> omit this entry
DONE dispose of the rest of the entries as you did
the last (all Y or N)
6. SPECIFY ENTRIES EXPLICITLY - type the names of the entries you
want (SAILOR etc) separated by <cr>. After all the names you want
type DONE<cr>
7. DON'T DELETE INTERMEDIATE FILES- don't delete the .FAI or .REL
files (only meaningful if doing PASS 2 now)
8. DON'T MAKE LIBRARY.(only meaningful doing PASS 2 now).
PASS 2
An important thing to remember is that SCISS doesn't remember what
you requested at the beginning of PASS 1 so if you want something
unusual (e.g. a reentrant library or a library without certain
entries) you are going to have to tell SCISS again.
1 DON'T DELETE INTERMEDIATE FILES
2 DON'T MAKE A LIBRARY
3 MAKE A REENTRANT LIBRARY
4 SELECT ENTRIES FROM PROMPT-LIST
5 SPECIFY ENTRIES EXPLICITLY
These have the same meaning as they did in PASS 1.
GOOD LUCK WITH SCISS
B. MAKTAB.SAI
Assemble and run to get a new copy of 2OPS2.OPS, just for fun or
because you changed it. This file is needed on SYS before the
START_CODE feature will work.