perm filename III[G,BGB] blob
sn#066967 filedate 1974-01-02 generic text, type C, neo UTF8
COMMENT ⊗ VALID 00006 PAGES
C REC PAGE DESCRIPTION
C00001 00001 VALID 00015 PAGES
C00003 00002 TITLE III - III DISPLAY SUBROUTINES - BGB - JANUARY 1973.
C00004 00003 SUBRS DPYSET,DPYBIG,DPYBRT Set buffer,char. size, brightness*
C00006 00004 SUBRS AVECT,AIVECT,RVECT,RIVECT Vectors
C00009 00005 SUBRS DPYSTR,DTYO,DPYOUT Output string,character, POG *
C00012 00006 SUBRS OCTDPY,DECDPY,FLODPY Numeric display *
C00033 ENDMK
C⊗;
TITLE III - III DISPLAY SUBROUTINES - BGB - JANUARY 1973.
↓A←1↔↓B←2↔↓C←3
INTERN BUFDPY,DPYPTR
BUFDPY: .+2↔=100↔BLOCK =100
INTERN DPYBUF
DPYBUF: DPYBU.↔=2048
DPYBU.: BLOCK =2048
IGNORE: BLOCK 1
SIZBRT: BLOCK 1
DPYCOL: BLOCK 1
DPYPTR: BLOCK 1
BUFEND: BLOCK 1
BUFHD: BLOCK 2 ;UPG ARGUMENT. ;ADDRESS ↔ LENGTH.
DDSAVE: BLOCK 1
;VERNIER III TEXT POSITIONING.
VERNX ←← 14
VERNY ←← 11
;DISPLAY SAIL STRING.
DPYSST↑: POP 16,1↔POP 16,2↔SKIPGE IGNORE↔POPJ P,
HRRZS 2 ;LENGTH OF STRING.
JUMPLE 2,SSRET
ILDB 3,1
IDPB 3,DPYPTR
SOJG 2,.-2
SSRET: HRRZ 1,DPYPTR
CAML 1,BUFEND
SETOM IGNORE
POPJ P,
;SUBRS DPYSET,DPYBIG,DPYBRT ;Set buffer,char. size, brightness*
SUBR(DPYSET,BUFFER) ;Initialize a display buffer *
;____________________________________________________________________
LAC 1,BUFFER↔CDR 2,-1(1) ;BUFFER SIZE.
ADDI 2,-1(1)↔DAC 2,BUFEND
ADDI 1,2↔DAC 1,BUFHD ;POINT TO THIRD WORD.
SETZM IGNORE
SETZM SIZBRT
CLR2: LAC A,BUFHD ;BLIT THE BUFFER WITH THE III-TEXT OPCODE 1.
LACI B,1↔DAC B,1(A)
LACI B,2(A)↔LIPI B,1(A)
BLT B,@BUFEND
PUSH P,(P)↔GO LV3
ENDR DPYSET
SUBR(DPYBIG,SIZE) ;Set character size
;____________________________________________________________________
;USES AC 1
LAC A,SIZE↔DPB A,[POINT 3,SIZBRT,27] ;REMEMBER NEW SIZE
POP1J
ENDR DPYBIG
;____________________________________________________________________
SUBR(DPYBRT,SIZE) ;Set brightness
;USES AC 1
LAC A,SIZE↔DPB A,[POINT 3,SIZBRT,24] ;REMEMBER NEW BRIGHTNESS
POP1J
ENDR DPYBRT
;SUBRS AVECT,AIVECT,RVECT,RIVECT ;Vectors
COMMENT ⊗
The III display processor is a stored program computer,
these III subroutines make a III program using only two display
operations: the long vector operation and the text operation. The
pointer to the display buffer is always maintained as a BYTE POINTER
to the last character displayed. The flag named IGNORE is set when
display buffer overflow occurs and all further display calls are
ignored until the buffer is used. The III instruction formats are
given below, unlike most CPU (but like must display processors of
its day) the immediate data fields are in the left portion of the
instruction and the opcode in the right.
TEXT DISPLAY WORD: ASCII/ABCDE/ + 1
LONG VECTOR WORD: BYTE(11)X,Y(3)BRT,SIZ(7)OPCODE
The long vector opcodes appear in the following four lines: ⊗
SUBR(RIVECT)
GO RIV. ↔ENDR RIVECT
SUBR(RVECT)
GO RV. ↔ENDR RVECT
SUBR(AIVECT)
GO AIV. ↔ENDR AIVECT
SUBR(AVECT)
GO AV. ↔ENDR AVECT
;USES AC 1-3
;DTYO DEPENDS ON THIS
RIV.: SKIPA C,[046] ;RELATIVE INVISIBLE VECTOR.
RV.: LACI C, 006 ↔GO LV0 ;RELATIVE VISIBLE VECTOR.
AIV.: SKIPA C,[146] ;ABSOLUTE INVISIBLE VECTOR.
AV.: LACI C, 106 ;ABSOLUTE VISIBLE VECTOR.
SETZM DPYCOL ;RESET TAB LOCATION
LV0: SKIPGE IGNORE↔POP2J
LV: LAC A,-2(P)↔LAC B,-1(P) ;PICKUP X AND Y.
LVC: DPB A,[POINT 11,C,10] ;PACK X INTO III-WORD.
DPB B,[POINT 11,C,21] ;PACK Y INTO III-WORD.
SKIPE A,SIZBRT ;NEW BRIGHTNESS OR SIZE?
GO [ IOR C,A↔DZM SIZBRT↔GO LV2] ;YES, SET IT
LV2: AOS A,DPYPTR↔DAC C,(A) ;PACK WORD INTO III-BUFFER.
LV3: LIPI A,<(<POINT 7,0,35>)> ;UPDATE DPYPTR...
DAC A,DPYPTR↔LACI A,(A) ;WHICH IS A BYTE-POINTER.
CAML A,BUFEND↔SETOM IGNORE ;CHECK FOR BUFFER OVERFLOW.
POP2J
;SUBRS DPYSTR,DTYO,DPYOUT ;Output string,character, POG *
;--------------------------------------------------------------------
SUBR(DPYSTR,TEXT)
;USES AC 1,3
LAC 3,TEXT↔LIPI 3,440700
ILDB 3↔JUMPE POP1J.
CALL(DTYO,0)↔GO DPYSTR+2
ENDR DPYSTR;---------------------------------------------------------
SUBR(DTYO,CHAR)
;USES AC 1
;DPYSTR DEPENDS ON DTYO NOT CLOBBERING 3
SKIPE SIZBRT
GO [ PUSHP 0↔PUSHP 2↔PUSHP 3
CALL(RIVECT,[0],[0])
POPP 3↔POPP 2↔POPP 0
GO .+1]
LAC 1,CHAR
CAIN 1,15
SETOM DPYCOL
CAIN 1,11
GO DOTAB
DTYO1: IDPB 1,DPYPTR
AOS DPYCOL
CDR 1,DPYPTR↔CAML 1,BUFEND
SETOM IGNORE↔POP1J
DOTAB: CALL(DTYO,[" "]) ;We got a tab, put out spaces until
LAC 1,DPYCOL ;column is divisible by 8
TRNE 1,7
GO DOTAB
CDR 1,DPYPTR
POP1J
ENDR DTYO;-----------------------------------------------------------
SUBR(DPYOUT,POG)
COMMENT ⊗------------------------------------------------------------
⊗↔ SKIPN A,BUFHD↔GO L1
LAC 2,DPYPTR↔DAC 2,-2(1)
LACI 2,2(2)↔SUB 2,1↔DAC 2,-1(1)
L1: CDR B,DPYPTR↔SUB B,BUFHD ;BUFFER LENGTH.
AOS B↔DAC B,BUFHD+1
LACM A,POG↔DPB A,[POINT 4,UPGOP,12] ;GLASS TO AC FIELD.
XCT UPGOP
POP1J
UPGOP: 703B8+BUFHD
ENDR DPYOUT;---------------------------------------------------------
;SUBRS OCTDPY,DECDPY,FLODPY ;Numeric display *
;--------------------------------------------------------------------
SUBR(OCTDPY,INTEGER) ;OCTAL NUMBER DISPLAY.
Q←15 ↔ N←13
SKIPA↔GO L2
LAC 14,INTEGER↔LAC Q,[POINT 3,14,-1]↔LACI N,6
L1: ILDB Q↔IORI 60↔CALL(DTYO,0)↔SOJG N,L1
CALL(DTYO,[" "])
L2: LAC 14,INTEGER↔LAC Q,[POINT 3,14,17]↔LACI N,6
L3: ILDB Q↔IORI 60↔CALL(DTYO,0)↔SOJG N,L3
POP1J
ENDR OCTDPY;3/25/73(BGB)---------------------------------------------
SUBR(DECDPY,INTEGER) ;DECIMAL NUMBER DISPLAY.
LAC 1,INTEGER↔POPP -1(P) ;FETCH ARG AND LAC RET. ADR.
L1: JUMPGE 1,L2 ;TEST FOR NEGATIVE NUMBER.
MOVM 2,1↔CALL(DTYO,["-"]) ;PRINT MINUS SIGN.
LAC 1,2
L2: IDIVI 1,12↔PUSH P,2 ;MODULO TEN AND SAVE.
SKIPE 1↔PUSHJ P,L2 ;TEST FOR DONE.
POP P,1↔ADDI 1,60↔CALL(DTYO,1) ;RESTORE & PRINT.
POP0J
ENDR DECDPY;12/17/72(BGB)--------------------------------------------
SUBR(FLODPY,FLONUM,PLACES) ;FLOATING NUMBER DISPLAY.
LAC FLONUM
JUMPL[CALL(DTYO,["-"])↔LACM FLONUM↔GO .+1]
LACM 2,PLACES↔CAILE 2,6↔LACI 2,6↔DAC 2,PLACES
FMPR[1.↔10.↔100.↔1000.↔10000.↔100000.↔1000000.](2)↔FIXX
IDIV[=1↔=10↔=100↔=1000↔=10000↔=100000↔=1000000](2)
PUSHP 1↔CALL(DECDPY,0)↔POPP 0
LAC 2,PLACES
ADD[=1↔=10↔=100↔=1000↔=10000↔=100000↔=1000000](2)
PUSHP DPYPTR↔CALL(DECDPY,0)↔POPP 1
LACI "."↔IDPB 0,1
POP2J
ENDR FLODPY;12/17/72(BGB)--------------------------------------------
END
III.FAI - EOF.