ShootTheCore
Legendary
I have an Irem Major Title 2 board that I'm converting over to R-Type Leo by following the directions in the thread here: http://www.jammaplus.co.uk/forum/fo...rem-m92-major-title-2-to-rtype-leo-conversion
I've carefully followed the instructions step-by-step. The game boots up and looks and plays perfectly, but there's sound problems with the final output. In the sound test, all of the music tracks play their base track (with some details missing), and only two sound effects in the entire list work. Any ideas? Here's details and troubleshooting steps I've tried so far:
* The donor Major Title 2 worked perfectly beforehand.
* The checksums on all of the files check out against the checksums listed in the directions.
* The checksums on the two sound ROMs verify against the source files.
* I tried using two different ROM EPROMS for the sound - same symptoms with both pairs of chips.
* I replaced the capacitors on the board with fresh ones. Verified continuety with the multimeter on each capacitor with its circuit.
* Double-checked every jumper setting with the full list of jumpers listed in the directions.
* Verified continuety on every jumper setting with the multi-meter.
* Verified that my Major Title 2 board uses the same Nanao 08J27291A7 017 9227NK700 sound CPU that the conversion author had on his board.
I'm taking a break on it for now. I'm considering testing out the Main Program EPROMs next, and if that doesn't help, switching it back to Major Title 2 again and double-checking that the board is still fully functional there. Any other suggestions?
I've carefully followed the instructions step-by-step. The game boots up and looks and plays perfectly, but there's sound problems with the final output. In the sound test, all of the music tracks play their base track (with some details missing), and only two sound effects in the entire list work. Any ideas? Here's details and troubleshooting steps I've tried so far:
* The donor Major Title 2 worked perfectly beforehand.
* The checksums on all of the files check out against the checksums listed in the directions.
* The checksums on the two sound ROMs verify against the source files.
* I tried using two different ROM EPROMS for the sound - same symptoms with both pairs of chips.
* I replaced the capacitors on the board with fresh ones. Verified continuety with the multimeter on each capacitor with its circuit.
* Double-checked every jumper setting with the full list of jumpers listed in the directions.
* Verified continuety on every jumper setting with the multi-meter.
* Verified that my Major Title 2 board uses the same Nanao 08J27291A7 017 9227NK700 sound CPU that the conversion author had on his board.
I'm taking a break on it for now. I'm considering testing out the Main Program EPROMs next, and if that doesn't help, switching it back to Major Title 2 again and double-checking that the board is still fully functional there. Any other suggestions?