00100		Floppy disk serial protocol.
00200	
00300	EC = Error code.
00400	"A" = ASCII = 101.
00500	<Xxxx> = 1 Byte.
00600	0 <= n <= 16.
00700	
00800	Host		Floppy
00900	--------------------------------
01000		Write
01100	--------------------------------
01200	 1
01300	"W"
01400	 4
01500			6 or EC
01600	 2
01700	<Data> * 256
01800	<Check sum>
01900			6 or EC
02000	--------------------------------
02100		Read
02200	--------------------------------
02300	 1
02400	"R"
02500	 4
02600			6 or EC
02700			2
02800			<Data> * 256
02900			<Check sum>
03000	--------------------------------
03100		Define file
03200	--------------------------------
03300	 1
03400	"E"
03500	<File name> * 9
03600	 4
03700			6 or EC
03800	--------------------------------
03900		Close
04000	--------------------------------
04100	 1
04200	"C"
04300	 4
04400			6 or EC
04500	--------------------------------
04600		Select file
04700	--------------------------------
04800	 1
04900	"O"
05000	<File name> * 9
05100	 4
05200			6 or EC
05300	--------------------------------
05400		Delete file
05500	--------------------------------
05600	 1
05700	"K"
05800	<File name> * 9
05900	 4
06000			6 or EC
     

00100	Host		Floppy
00200	--------------------------------
00300		Request directory
00400	--------------------------------
00500	 1
00600	"D"
00700	 4
00800			6 or EC
00900	--------------------------------
01000		Send next directory
01100	--------------------------------
01200	 1
01300	"N"
01400	 4
01500			6 or EC
01600			2
01700			n * (<":"> <File name>*9 <File length>)
01800			4
01900	--------------------------------
02000		Request free blocks
02100	--------------------------------
02200	 1
02300	"B"
02400	 4
02500			6 or EC
02600			2
02700			<Lsbyte of free blocks>
02800			<Msbyte>
02900			4
03000	--------------------------------
03100		Perform special function
03200	--------------------------------
03300	 1
03400	"P"
03500	 4
03600			6 or EC
03700	--------------------------------
03800		Format disk
03900	--------------------------------
04000	 1
04100	"F"
04200	 4
04300			6 or EC
04400	--------------------------------
04500		Initialize directory
04600	--------------------------------
04700	 1
04800	"I"
04900	 4
05000			6 or EC
05100	--------------------------------
05200		Compress disk
05300	--------------------------------
05400	 1
05500	"Q"
05600	 4
05700			6 or EC
     

00100		Error codes.
00200	All error codes are in octal.
00300	
00400	2	File already exists.
00500	
00600	3	File does not exist.
00700	
00800	4	Illegal command.
00900	
01000	5	Disk full.
01100	
01200	6	End of file.
01300	
01400	7	Initialize error.
01500	
01600	10	File already open.
01700	
01800	11	Communication error.
01900	
02000	13	Directory read error.
02100	
02200	14	Block check error.