~xmc/680 - Unnamed repository; edit this file 'description' to name the repository.

Age	Commit message (Collapse)	Author
2010-11-09	Added guards around all routines that touch ePC or eSP.	Astrid Smith
	These guards have one major fault I can see. I put them as early in the routine as possible, but it's still a distinct possibility that the 68k interrupt will fire between move.b (epc)+,d0 in macro DONE of one instruction and the call to HOLD_INTS in the following instruction. I don't have a good solution to this. I can use the hardware interrupt holding support to make everything a critical section except for the cycle gap before that instruction, but that makes _every_ instruction 24 cycles slower. I don't consider that an acceptable solution.
2010-09-14	Conditional jumps work now.	Astrid Smith
	Holy shit that was a hairy debug session. I have a lot to look forward to.
2010-09-14	Trivial changes.	Astrid Smith

2010-09-13	CCF flags :(	Astrid Smith

2010-09-13	Documentation update	Astrid Smith

2010-09-13	Timing correction macro added (as yet nonfunctional)	Astrid Smith

2010-09-13	Fixed glaring bug in arithmetic routines affecting (HL)	Astrid Smith

2010-09-13	Speed improvements to some instructions.	Astrid Smith

2010-09-13	Fixed bug in conditional instructions which take an argument	Astrid Smith

2010-09-13	More testcases and a few fixes	Astrid Smith

2010-09-13	Comments saying what opcodes haven't been tested yet	Astrid Smith

2010-09-13	Started out on my own test suite	Astrid Smith

2010-09-13	Endianness fixes, I don't know how correct these are ...	Astrid Smith

2010-09-13	Made HALT instruction halt, even if it's not a very good way to halt	Astrid Smith

2010-09-13	Small patch to make JR reliable	Astrid Smith

2010-09-10	XXX UNDO LATER: Performance degrading change to make debugging easier	Astrid Smith

2010-09-10	I think I nailed all the remaining wrong-sized moves of address registers ...	Astrid Smith

2010-09-10	Widened spacing to 64 bytes/instr to give myself some breathing room for now	Astrid Smith

2010-09-10	CALL was mistakenly fetching an extra word and jumping to JP NZ instead of JP	Astrid Smith

2010-09-10	Fix to make PUSHW use d2 instead of d0	Astrid Smith

2010-09-10	Two more fixes	Astrid Smith
	The underef function will now return 0 if a match is not found, rather than returning something undefined. The routine for CALL immed.w was mistakenly calling deref with a truncated address. This has been fixed.
2010-09-10	Lazy, slow hack to FETCHW and FETCHWI becuase I forgot about endianness	Astrid Smith

2010-09-06	Registers holding emulated registers are now named.	Astrid Smith
	Hopefully 'esp', 'epc', 'eaf', and friends will be less troublesome than 'a4', 'a6', and 'd3'.
2010-09-06	Fixes to actually run code	Astrid 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.
2010-07-23	Merge branch 'master' of git@github.com:chronomex/680	Astrid Smith

2010-07-23	Comments about speediness	Astrid Smith

2010-07-23	Tiny change	Astrid Smith

2010-06-28	Minor comment changes	Astrid Smith

2010-06-26	Parted out remaining un-written ALU instructions.	Astrid Smith

2010-06-26	Parted out ADC macro-instruction	Astrid Smith

2010-06-26	Parted out ADD macro-instruction	Astrid Smith

2010-06-21	Parted out F_SUB_B to alu_sub.	Astrid Smith

2010-06-21	Parted out F_SBC_B to alu_sbc.	Astrid Smith

2010-06-21	Moved DONE macro to a more sensible location	Astrid Smith

2010-06-20	Moved macros into opcodes file	Astrid Smith

2010-06-20	Moved emulation core into opcodes.asm	Astrid Smith