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Please refer to my Excel chart on this question.

The unknown author is known as Nice Code Software. "Mario Kart" is a hack of Nintendo's "F-1 Race", while "Metal Slug" and "Crash Bandicoot" are original backports of the respective Game Boy Advance titles.

Two more samples: Scanline | PA12 | PPUCycle | Event ---------+------+----------+--------------- 241 | 1 | 28 | NMI 258 | 0 | 261 | $C000=$BC 258 | 0 | 279 | $C001=$00 258 | 0 | 291 | $E001=$00 188 | 0 | 289 | IRQ 188 | 0 | 301 | $E000=$00 189 | 0 | 41 | $E001=$00 189 | 0 | 59 | $C000=$04 193 | 0 | ...

I rewrote the MMC5 emulation for NintendulatorNRS some time ago, and in that test ROM, the ruler does move, but in the wrong direction --- instead of revealing the "A", it lost the "9".

Yes, that is true, I can control how many M2 cycles before ack'ing the IRQ. It is not triggered by the IRQ itself, but since the test stays the same through each loop, I can precisely control which M2 cycle does the ack. I tweak it see it move on the scope to find the right spot. Is not possible th...

rainwarrior wrote:Questforge was NROM stuck on a cheap COOLBOY multicart

The SMD132/SMD133 "Coolboy/Mindkids" PCBs seem to be popping up everywhere these days.

I successfully converted "Hard Drivin'" to Waixing's Mapper 176.

But yes, for Skull & Crossbones, because it needs both scanline and M2 IRQ counters, VRC4 or VRC6 is probably the best choice.

Nintendo's leaked lot check spreadsheets have an interesting unreleased MMC5 game entry: a cartridge conversion of "Famicom Mukashibanashi: Shin Ongashima". It is listed as having used a "HVC-ENROM" circuit board with 256 KiB of PRG-ROM, 8 KiB of PRG-RAM, 8 KiB of CHR-RAM, a battery, and this commen...

Bregalad wrote:MMC5 (officially) only supports CHR-ROM

I didn't know that.

I don't quite understand how you get to a scanline length of 227 M2 cycles, but it should not matter for the purpose of the test, as long as the PA12 rise and fall is appropriately spaced. I check scanline_count and the number of $8000 reads. If it matches the test case, do this sequence: (...) I se...

Show screenshots and/or a gamelist of the 22-in-1 part. If it is the same as the DY-636-42's, then one might just take that one's 1 MiB ROM and replace the 20-in-1 part with yours.

Thank you for the test ROM. I get a picture similar to your FCEUX reference picture in NintendulatorNRS. How is it supposed to look? It's not obvious to me what I should be getting.

Please always specify whether you are working on the rev0 or rev1 ROM file.

Could you post the ROM you are testing with?

You still did not dump it correctly; the second 512 KiB half is identical to the first. Once you have correctly dumped both halves, the correct mapper for the reset-based variant will be 233. 226 is for a non-reset-based variant of various sizes up to 2 MiB. I did not understand earlier that the swi...