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dfd5bcab1b
Early data sheets listed BRK as one byte, but RTI after a BRK skips the following byte, effectively making BRK a 2-byte instruction. Sometimes, such as when diassembling Apple /// SOS code, it's handy to treat it that way explicitly. This change makes two-byte BRKs optional, controlled by a checkbox in the project settings. In the system definitions it defaults to true for Apple ///, false for all others. ACME doesn't allow BRK to have an arg, and cc65 only allows it for 65816 code (?), so it's emitted as a hex blob for those assemblers. Anyone wishing to target those assemblers should stick to 1-byte mode. Extension scripts have to switch between formatting one byte of inline data and formatting an instruction with a one-byte operand. A helper function has been added to the plugin Util class. To get some regression test coverage, 2022-extension-scripts has been configured to use two-byte BRK. Also, added/corrected some SOS constants. See also issue #44.
57 lines
1.4 KiB
Plaintext
57 lines
1.4 KiB
Plaintext
; Copyright 2018 David Schmidt. All Rights Reserved.
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; See the LICENSE.txt file for distribution terms (Apache 2.0).
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;
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; Source: SOS programmer's guide
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; SOS Reference Manual, Volume 2 (Apple 1982)
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*SYNOPSIS Apple /// Sophisticated Operating System constants.
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; SOS MLI function codes.
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*TAG SOS-MLI-Functions
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SOS_REQUEST_SEG = $40
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SOS_FIND_SEG = $41
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SOS_CHANGE_SEG = $42
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SOS_GET_SEG_INFO = $43
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SOS_GET_SEG_NUM = $44
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SOS_RELEASE_SEG = $45
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SOS_SET_FENCE = $60
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SOS_GET_FENCE = $61
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SOS_SET_TIME = $62
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SOS_GET_TIME = $63
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SOS_GET_ANALOG = $64
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; SOS ref: "TERMINATE"
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; SOS ref: "No errors are possible. This is an excellent call for beginners."
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SOS_QUIT = $65
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SOS_READBLOCK = $80
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SOS_WRITEBLOCK = $81
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SOS_D_STATUS = $82
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SOS_D_CONTROL = $83
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SOS_GET_DEV_NUM = $84
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SOS_D_INFO = $85
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SOS_CREATE = $C0
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SOS_DESTROY = $C1
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SOS_RENAME = $C2
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SOS_SET_FILE_INFO = $C3
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SOS_GET_FILE_INFO = $C4
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SOS_VOLUME = $C5
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SOS_SET_PREFIX = $C6
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SOS_GET_PREFIX = $C7
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SOS_OPEN = $C8
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SOS_NEWLINE = $C9
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; SOS ref: "READ"
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SOS_READFILE = $CA
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; SOS ref: "WRITE"
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SOS_WRITEFILE = $CB
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SOS_CLOSE = $CC
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SOS_FLUSH = $CD
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SOS_SET_MARK = $CE
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SOS_GET_MARK = $CF
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SOS_SET_EOF = $D0
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SOS_GET_EOF = $D1
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SOS_SET_LEVEL = $D2
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SOS_GET_LEVEL = $D3
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