I was trying to make a cart of Seirei Gari English translated by snark.
Game works fine in an emulator and on Everdrive.
Game was burnt to a 27c040 and it was wired like shown in other posts by me:
Pin 1,2,24,30,31,32 were lifted
Pin 2 to hole 22 MaskROM (A16)
Pin 24 to GND
Pin 30 and 32 VCC
Pin 31 NC
Game boots, works but has graphic glitches.
I've checked mirroring. All set properly.
I checked my wirings again and again. All correct.
Desoldered the EPROM, read it, all correct and verified properly.
Soldered it in again. Same problem.
Measured all contacts with a multimeter. All present and correct.
So I came to the conclusion that the CHR RAM might be corrupted, so I replaced it with another one.
No change, still.
Had a 74HC161 lying around. No change either.
Sadly I don't have any 74HC32 left but I bought some and was wondering if it really can be destroyed? Here's pictures of the game running.
Title Screen looks fine, except the cursor, which is glitched.
After that it's a pure mess, as you can see.
Can the 74HC32 really cause such weird problems?
Problem solved. Seirei Gari uses UOROM and is marked as UNROM in emulators.
I wired accordingly and it works now!
[Subject Fairy was here]