byuu says:
Changelog:
- sfc/ppu/sprite updated to use new .bit(s) functions; masked sizes
better; added valid flags instead of using magic numbers
- ws/ppu updates to use new .bit(s) functions
- ws/ppu: added line compare interrupt support
- added ws/eeprom; emulation of WS/WSC internal EEPROM and cartridge
EEPROM (1kbit - 16kbit supported)
- added basic read/write handlers for remaining WS/WSC PPU registers
WS EEPROM emulation is basically a direct copy of trap15's code. Still
some unknown areas in there, but hopefully it's enough to get further
into games that depend on EEPROM support. Note that you'll have to
manually add the eeprom line to the manifest for now, as icarus doesn't
know how to detect EEPROM/sizes yet.
I figured the changes to the SNES PPU sprites would slow it down a tad,
but it actually sped it up. Most of the impact from the integer classes
are gone now.
byuu says:
More V30MZ implemented, a lot more to go.
icarus now supports importing WS and WSC games. It expects them to have
the correct file extension, same for GB and GBC.
> Ugh, apparently HiDPI icarus doesn't let you press the check boxes.
I set the flag value in the plist to false for now. Forgot to do it for
higan, but hopefully I won't forget before release.
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