After that I’ve putted the SNES driver in a better shape, I’ve started to look at the Sharp X-1 HW on the MESS side. After some days of coding, I’ve started to get reasonable results…

As you can see from some snaps, there’s still a long way to go…

For fun I’m currently looking at some long standing Super Nes video plagues in MESS:

Fixed a flag bug with blending effects:

Added basic support for horizontal mosaic effects for all games in the driver:

Fixed a 16×16 tile switch bug in 2bpp mode:

EDIT1 (3-ago-2009):

Fixed Super Kick Boxing sound and booting, caused by an undefined register read (graphics are still quite off, HDMA?):

Shien The Blade Chaser / Shien’s Revenge instead tests a register that in theory must be 0xff (the NMITIEN), still investigating…

EDIT2: (4-ago-2009): Fixed mode 5/6 tilemap drawings cutted in half bug, there are still issues caused by something else…

(will update the post as long that I’ll get & fix new ideas)

Last week Olivier Galibert and Wilbert Pol did some efforts in identifying the CPUs in Pachi Fever and Hit Poker. While the former uses a TMS9900 but we didn’t made any noticeable progress (HW looks awkward or there are CPU bugs, take your pick), the latter one uses a MC68HC11 (that’s used on the Taito-JC HW, some other MESS-related systems and in Deroon Dero Dero / Angel Eyes as MCU). The HC11 CPU core was in pretty bad shape (the Taito-JC really makes small use of it), so after something like 100 implemented opcodes, a bunch of bug fixes and some really basic irq system, here’s the results:

*EDIT*: Fixed 4bpp / 8bpp switches, fixes mostly the cards display:

Now it needs EEPROM emulation (that’s non-standard) and inputs to get it working…