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abcprintd protocol
FF 00 -> end of print job
FF FF -> FF as part of print job
All other bytes are part of a print job
File sharing commands:
----------------------
All commands start with FF <opcode> <seq>, and all responses begin
with FF <opcode> <seq> <err>, where <err> is 0 for OK and otherwise
0x80+ABC80 error code.
FF A0 ss ixix NNNNNNNNEEE OPEN TEXT
ixix = Address of IX-map (used as a handle)
Open an existing file for reading in text mode
If the filename is empty (all spaces), read the directory
FF A1 ss ixix NNNNNNNNEEE OPEN BINARY
Open an existing file for reading in binary (block) mode
FF A2 ss ixix NNNNNNNNEEE PREPARE TEXT
Create a new file for writing in text mode
FF A3 ss ixix NNNNNNNNEEE PREPARE BINARY
Create a new file for writing in binary (block) mode
FF A4 ss ixix INPUT
Read a text line; response followed by len (2 bytes) + data
FF A5 ss ixix len READ BLOCK
Read a data block of specified len; response: len + data
FF A6 ss ixix len data... PRINT
Write a text line or data block
FF A7 ss ixix CLOSE
Close a file handle
FF A8 ss xxxx CLOSE ALL
All files are closed and forgotten. xxxx ignored.
FF A9 ss xxxx CLOSE ALL NO REPLY
All files are closed and forgotten. xxxx ignored.
No response token is sent.
Debug console
-------------
FF C0 .... 00
Text between FF C0 and terminating 00 are written out on
stdout for abcprintd if the -c option was given. Intended to
be used for debugging messages.
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