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Making SEGA Genesis cartridges
pbj:
Yellow is a hypothetical jumper from pin 42 to 5V. Blue is a jumper to ground. Some games/chips work with one, some with the other. Try both.
bulldawg:
So pin 1 and 42 to 5v no go, but both to ground and I get the sega screen followed by a red screen. So some progress. This is the 40 pin nhl 93 pcb with the trace cuts and jumpers. Also just to note I have a socket installed and the legs are down but not touching pcb. I have tmnt hsh 1 mb image on 2mb eeprom.
pbj:
Cut the traces above A8 and A9 above your jumper wires. You don’t want them connecting to any of the SRAM stuff.
If that doesn’t do it, reflow your socket connections. Particularly top row towards the middle.
You’re positive the checksum is correct? Red screen is usually checksum error.
You’re close.
:cheers:
bulldawg:
--- Quote from: pbj on June 12, 2023, 11:05:59 pm ---Cut the traces above A8 and A9 above your jumper wires. You don’t want them connecting to any of the SRAM stuff.
If that doesn’t do it, reflow your socket connections. Particularly top row towards the middle.
You’re positive the checksum is correct? Red screen is usually checksum error.
You’re close.
:cheers:
--- End quote ---
So I cut the traces above a8 and a9, I checked all the pins for continuity and all good and I dumped the rom and test in kega and it works but still no go.
pbj:
Open the rom header on the rom suite program and make sure it matches. I can post a pic tomorrow. Or just email it to me and I’ll test. (Pinballjim at hotmail dot com)
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