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My bad. I should have studied better the code (I got confused by the 512 above), before jumping to the wrong fix...

Thanks for fixing it, Arbee.

Bug report: Notice that sprites have up and left wraparound issues, especially noticeable in Super Mario World, you can easily test it in water levels by going off-screen with Mario.

Anyway, time for me to check how the Nintendo Super System BIOS works, it's a z80 plus external video output (M50458 - Mitsubishi M50458-001SP On-Screen Display (OSD) Chip (NDIP32), I haven't found any manual so far, Stiletto? ). I've got to the point that it loads the Instruction ROM, and then it waits for a vblank irq ... by doing this:

13EC: 3E 10 ld a,$10
13EE: ED 47 ld i,a
13F0: ED 57 ld a,i
13F2: FE 10 cp $10
13F4: 28 FA jr z,$13F0
13F6: C9 ret

RISC-style IRQs anyone?

Offscreen in which direction? right-left wraparound should be quite good (e.g. Super Bomberman 5 title screen uses sprites wrap for the leftmost character and it's fine with current code)
up-down wraparound is otoh not that good: I noticed it when I fixed the Sim City problem, but my first attempts to improve it were breaking some other games...

I plan to do some more experiments after 0.138 is out (to avoid further regressions before the full release)

EDIT: and good luck with NSS! the menus have always been a mystery to me (and Reip too, iirc)

I thought the NSS menu processor code was unknown and didn't disassemble meaningfully. Was it decrypted?

It's just a plain z80, according also to Guru^TM readme. Probably there was an old dump that didn't disassemble correctly ... or not? I've always thought that was a z80 anyway, fwiw ...

Probably major issues comes with the VDP stuff ... I'm getting some results now, the BIOS is really complex and I bet whatever you want that without major z80 dasm skills you won't go to anywhere, first thing that comes to mind are the 2 (yeah, TWO) EEPROM devices.

M50458 - hm, okay.

Related patent: http://www.google.com/patents?id=MZ..._r&cad=0#v=onepage&q&f=false
and we will never see that user manual...

Datasheet... Sangmeister has it, I'll go ping him.

[EDIT] Al may also have it, we'll see who's first...

Go go Stiletto Power!

with latest svn, the following is now possible in MESS:



given that it's not possible for carts to enable subslots, I had to create a new driver "snesst" which (similarly to snessfx) emulates a SNES+Sufami Base Cart and offers 2 cartslot to the user to mount the st carts

More screens







some games work, some freeze at start.

also, mounting two carts is acknowledged by the emulated systems, e.g. because it warns you about carts inserted in the wrong slot



and it sees both mounted carts



but I don't think all data are read correctly...

I also had some work on the BS-X memory mapping which seemed promising (the CPU was able to reach reasonable code), but it turned out to be busted. so I threw it away and I left only the BS-X cartslot work. Due to device limitations, also the bsx unit is emulated with a separate driver: snesbsx offers two cartslots, the first for the base BS-X cart or for a compatible cart (like Same Game) and the second for the flash cart. However, the driver does nothing at the moment.

Just a small request: Please split unrelated commits, this makes testing for regressions and viewing changes easier.

sorry. I feared I could miss some makefile change, breaking the compilation (which, of course, I managed to nevertheless, by missing one .h file)