byuu says:
Changelog:
- WS: fixed lods, scas instructions
- WS: implemented missing GRP4 instructions
- WS: fixed transparency for screen one
- WSC: added color-mode PPU rendering
- WS+WSC: added packed pixel mode support
- WS+WSC: added dummy sound register reads/writes
- SFC: added threading to SuperDisc (it's hanging for right now; need to
clear IRQ on $21e2 writes)
SuperDisc Timer and Sound Check were failing before due to not turning
off IRQs on $21e4 clear, so I'm happy that's fixed now.
Riviera starts now, and displays the first intro screen before crashing.
Huge, huge amounts of corrupted graphics, though. This game's really
making me work for it :(
No color games seem fully playable yet, but a lot of monochrome and
color games are now at least showing more intro screen graphics before
dying.
This build defaults to horizontal orientation, but I left the inputs
bound to vertical orientation. Whoops. I still need to implement
a screen flip key binding.
byuu says:
Changelog:
- WS: fixed a major CPU bug where I was using the wrong bits for
ModR/M's memory mode
- WS: added grayscale PPU emulation (exceptionally buggy)
GunPey now runs, as long as you add:
eeprom name=save.ram size=0x800
to the manifest after importing with icarus.
Right now, you can't control the game due to missing keypad polling.
There's also a lot of glitchiness with the sprites. Seems like they're
not getting properly cleared sometimes or something.
Also, the PPU emulation is totally unrealistic bullshit. I decode and
evaluate every single tile and sprite on every single pixel of output.
No way in hell the hardware could ever come close to that. The speed's
around 500fps without the insane sprite evaluations, and around 90fps
with it. Obviously, I'll fix this in time.
Nothing else seems to run that I've tried. Not even far enough to
display any output whatsoever. Tried Langrisser Millenium, Rockman
& Forte and Riviera. I really need to update icarus to try and encode
eeprom/sram sizes, because that's going to break a lot of stuff if it's
missing.
byuu says:
I refactored my schedulers. Added about ten lines to each scheduler, and
removed about 100 lines of calling into internal state in the scheduler
for the FC,SFC cores and about 30-40 lines for the other cores. All of
its state is now private.
Also reworked all of the entry points to static auto Enter() and auto
main(). Where Enter() handles all the synchronization stuff, and main()
doesn't need the while(true); loop forcing another layer of indentation
everywhere.
Took a few hours to do, but totally worth it. I'm surprised I didn't do
this sooner.
Also updated icarus gmake install rule to copy over the database.
byuu says:
Lots of improvements. We're now able to start executing some V30MZ
instructions. 32 of 256 opcodes implemented so far.
I hope this goes without saying, but there's absolutely no point in
loading WS/WSC games right now. You won't see anything until I have the
full CPU and partial PPU implemented.
ROM bank 2 works properly now, the I/O map is 16-bit (address) x 16-bit
(data) as it should be*, and I have a basic disassembler in place
(adding to it as I emulate new opcodes.)
(* I don't know what happens if you access an 8-bit port in 16-bit mode
or vice versa, so for now I'm just treating the handlers as always being
16-bit, and discarding the upper 8-bits when not needed.)
byuu says:
So, this WIP starts work on something new for higan. Obviously, I can't
keep it a secret until it's ready, because I want to continue daily WIP
releases, and of course, solicit feedback as I go along.
Tim Allen