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2010-09-06Fixes to actually run codeDuncan Smith
This is the version to run the first (trivial) infinite loop correctly. I hacked up the loader slightly to replace one of the (nonexistent) pages with a static byte array. z80 code executed: $4000: JP $4000 4000 c3 40 00 4003 This version also draws the opcode executed on the screen, to aid in debugging the emulator: move.b d0,$4c00+32*(128/8) Also, it turns out that I was mixing up the emulated SP (a4) and emulated PC (a6). That has been fixed. Further, it seems that movea defaults to a word operation in a68k. This led to pointer corruption, which has been fixed.
2010-07-23Merge branch 'master' of git@github.com:chronomex/680Duncan Smith
2010-07-23Comments about speedinessDuncan Smith
2010-07-23Tiny changeDuncan Smith
2010-06-28Minor comment changesDuncan Smith
2010-06-26Parted out remaining un-written ALU instructions.Duncan Smith
2010-06-26Parted out ADC macro-instructionDuncan Smith
2010-06-26Parted out ADD macro-instructionDuncan Smith
2010-06-21Parted out F_SUB_B to alu_sub.Duncan Smith
2010-06-21Parted out F_SBC_B to alu_sbc.Duncan Smith
2010-06-21Moved DONE macro to a more sensible locationDuncan Smith
2010-06-20Moved macros into opcodes fileDuncan Smith
2010-06-20Moved emulation core into opcodes.asmDuncan Smith