Commit Graph

5 Commits

Author SHA1 Message Date
Tim Allen a7ffbd784b Update to release v000r08.
byuu says:

Changelog:
- rewrote sprite rendering, grabs first ten sprites, draws them in
  revere order of a: X-index, b: OAM appearance order
- simplified tile decoding to use less variables
- added MBC3 emulation (for now, RTC is always enabled)
- STOP can be broken via joypad IF, this may not be correct though (it
  may trigger even without P10-13 being modified)
- cleaned up all MBC emulation to use masks instead of ranges
- MBC2 uses 512-byte table now, ignores high 4-bits. Easier this way I guess
- tools menu temporarily has a console tracer enable option
- some other stuff

No real visible improvements :(
2011-01-04 21:42:27 +11:00
Tim Allen ebd6a52811 Update to release v000r06.
byuu says:

Added MBC1 emulation, although battery RAM doesn't save or load to disk
yet.
Made up a fake MBC0 which is really just saying 'no MBC', for consistent
handling of all MBCs.
Added bumpers to stop ROM/RAM out of bounds accesses.
Added STAT interrupts for LY coincidence, Vblank and Hblank (not for OAM
access yet, I don't know the timings.)
Fixed timer interrupt [Jonas Quinn]
Made all interrupts call a CPU function instead of just setting a flag
for better control (to allow below addition.)
Added HALT and STOP emulation, the latter permanently locks the Game Boy
for now. The former breaks on interrupts.
Rewrote all the rendering code to suck 50% less, though it's still
absolutely miserable and scanline-based.
Added pixel-level horizontal scrolling to BGs.
Fixed OBJ rendering error that was making them render upside down (I was
flipping to compensate before.)
Added OBJ 8x16 mode.
Added OBJ priority support.
Added window (but it's broken to all hell on Mega Man II.)
2011-01-02 15:46:54 +11:00
Tim Allen 2330ed6e8c Update to release v000r04.
byuu says:

[screenshot of the Tetris title screen]

Less than fourty-eight hours after starting on this. I guess you weren't
kidding, Exophase.
2010-12-30 18:18:47 +11:00
Tim Allen 1c3c7fe0a7 Update to release v000r02.
byuu says:

314 of 512 opcodes implemented, can execute the first 67,450
instructions of Tetris.

I also added an MMIO bus, ala bsnes, so that I can map and access
individual registers with a single indirection.
2010-12-29 22:03:42 +11:00
Tim Allen e0a9f1cf2c Update to release v000r01.
byuu says:

Hooked up a scheduler to enter/exit the CPU core wherever I want. Added
basic 4*1024*1024hz clock, and about eleven or so opcodes. Creating the
disassembler as I encounter each new opcode, not skipping ahead to do
all 'like other' opcodes, eg if I add 'dec b', I don't then add 'dec c'
until I encounter it.
2010-12-28 17:03:02 +11:00