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2010-09-10XXX UNDO LATER: Performance degrading change to make debugging easierDuncan Smith
2010-09-10Underef routine now should work correctlyDuncan Smith
2010-09-10How could I forget to actually write characters in 'writestr'?Duncan Smith
2010-09-10I think I nailed all the remaining wrong-sized moves of address registers ...Duncan Smith
2010-09-10Widened spacing to 64 bytes/instr to give myself some breathing room for nowDuncan Smith
2010-09-10CALL was mistakenly fetching an extra word and jumping to JP NZ instead of JPDuncan Smith
2010-09-10Fix to make PUSHW use d2 instead of d0Duncan Smith
2010-09-10Two more fixesDuncan 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.
2010-09-10Lazy, slow hack to FETCHW and FETCHWI becuase I forgot about endiannessDuncan Smith
2010-09-10Trying to get the zexdoc testbench to run.Duncan Smith
Now, at least, it's integrated into the build system and will be automatically included in built executables.
2010-09-10Added stubs for putting the emulated screen into a TIOS-drawn window.Duncan Smith
2010-09-10Completely patched zexdoc to assemble with SPASM.Duncan Smith
2010-09-08Some more changes, spasm almost doesn't complain anymore!Duncan Smith
2010-09-08Working on adapting zexdoc to work in spasmDuncan Smith
2010-09-07Blank files for multibyte opcodes createdDuncan Smith
2010-09-07Added testbenches folderDuncan Smith
2010-09-07Fixed the last movea that wasn't size-suffixedDuncan Smith
2010-09-07IO port framework now worksDuncan Smith
A68k is defaulting all my address moves to word size, rather than long. I don't know whether I've expunged all this nonsense yet, but I'm trying. This version executes an infinite loop which writes 'A' to port 00h. I've patched in a write-to-console function on port 00h, so this can be used as a sort of debug monitor.
2010-09-06I actually have a Makefile now, thank you very much.Duncan Smith
2010-09-06Assembler is picky about EQUR apparently ...Duncan Smith
2010-09-06Registers holding emulated registers are now named.Duncan Smith
Hopefully 'esp', 'epc', 'eaf', and friends will be less troublesome than 'a4', 'a6', and 'd3'.
2010-09-06Registers holding emulated registers are now named.Duncan Smith
Hopefully 'esp', 'epc', 'eaf', and friends will be less troublesome than 'a4', 'a6', and 'd3'.
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.
2010-08-02HACK XXX UNDO LATER Made relative flag references absolute.Duncan Smith
A68k wanted to add relocations, but couldn't figure out how. Undo this later when it's speed time, as this (probably) slows things down a bit.
2010-08-02No-code fixes to make it compileDuncan Smith
2010-08-02Fixed target executable nameDuncan Smith
2010-07-24Again, I shouldn't be trusted to write C ...Duncan Smith
2010-07-24Created ROM packager utility stubDuncan Smith
2010-07-24Clearly, I shouldn't be trusted to write C.Duncan Smith
2010-07-24Created MakefileDuncan Smith
2010-07-23Merge branch 'master' of git@github.com:chronomex/680Duncan Smith
2010-07-23Comments about speedinessDuncan Smith
2010-07-23First go at program loader created, as yet untestedDuncan Smith
2010-07-23Tiny changeDuncan Smith
2010-07-18TODO updateDuncan Smith
2010-07-17deref wasn't working properly because of insufficient shifting, fixedDuncan Smith
2010-07-17Now initializing PC correctlyDuncan Smith
2010-07-03Now it compiles properly. Still doesn't seem to run without address error, ↵Duncan Smith
though.
2010-07-02Created initial spec for image formatDuncan Smith
2010-07-02Temporary fixes for alignment issuesDuncan Smith
2010-07-02GCC complained about pages array being of undefined length, fixed.Duncan Smith
2010-07-02Fix/refactor: bankswap_4000_write -> bankswap_b_writeDuncan Smith
2010-06-30Readme editDuncan Smith
2010-06-30fooDuncan Smith
2010-06-28Minor comment changesDuncan Smith
2010-06-26Added bank-swapping routines (incomplete: doesn't implement memory map mode 1)Duncan Smith
2010-06-26Rewrote loader routine in CDuncan Smith
2010-06-26Corrected address error when accessing f_host_ccr.Duncan Smith
2010-06-26Completed CP macro-instructionDuncan Smith
2010-06-26Parted out remaining un-written ALU instructions.Duncan Smith
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