34 lines
2.0 KiB
Plaintext
34 lines
2.0 KiB
Plaintext
This is a modified version of MEGA65 Open ROMs (https://github.com/MEGA65/open-roms),
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forked at upstream commit ad178dbe4d48cd6a317737a8e0e7e662f7e33d32.
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Modified by Christian Werner, 2026-10-14 and 2026-10-15, for the mc64 computers of
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arnitech, a set of Minecraft mods (https://git.susdog.de/chris/arnitech). The fork lives
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at https://git.susdog.de/chris/open-roms, branch mc64.
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Changes:
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- src/,,config_mc64.s: a new build configuration, copied from src/,,config_c64.s, with its
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own config ID ($6D), the brand "MC64", and BCD_SAFE_INTERRUPTS turned off.
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- Makefile: targets for that configuration, build/kernal_mc64.rom and build/basic_mc64.rom,
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made the same way as the c64 ones.
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- src/kernal/iec/ciout.s (2026-10-15): CIOUT buffers its byte in TBTCNT, where the send
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routine takes it from, not in BSOUR (upstream PR #113).
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- src/kernal/iec/close_iec.s (2026-10-15): CLOSE sends LISTEN, $E0 plus the secondary
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address, and UNLISTEN; it sent a command ORed with zero page $E0 and no LISTEN.
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- src/kernal/iec/chkin_iec.s, ckout_iec.s (2026-10-15): CHKIN and CHKOUT take the secondary
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address from SAT, not from LAT, the logical file numbers.
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- src/kernal/iec/tksa.s (2026-10-15): TKSA sends the secondary address it is given, without
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ORing $90 into it (upstream issue #116).
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- src/kernal/iec/iec_tx_byte.s (2026-10-15): a data byte that no listener holds DATA for
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sets ST to $80 (device not present) and returns, instead of waiting forever.
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- src/kernal/iec/close_iec.s (2026-10-15): a CLOSE that finds no device sets ST to $80
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(device not present), and still frees the file number.
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- src/kernal/iec/unlsn.s, untlk.s (2026-10-15): UNLSN and UNTLK end with CLK, DATA, and ATN
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released; UNLSN left CLK pulled, and UNTLK waited for a talker to pull CLK, which after
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UNTALK none does, and then left CLK pulled.
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- src/kernal/iec/iec_return.s (2026-10-15): a serial routine that finds no device releases
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CLK, DATA, and ATN; it left CLK pulled.
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- NOTICE: this file.
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The licence terms are unchanged; see LICENSE, COPYING, and COPYING.LESSER.
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