- Joined: 11 Mar 2013
- Posts: 12
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Raphnet sms adapter - bios stack
 Posted: Mon Apr 13, 2020 6:42 pm
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Hi I have a question.
I've build the raphnet sms adapter and so far I had only 1 game that plays nicely....sonic the hedgehog.
I've build this adapter because the master system I was given wasn't working so I salvaged the good parts (z80, audio chip, srams, cartridge slot) and put them away for future use.
Now I found the cartridge slot again and had a none working copy of sonic 1 for the genesis and decided to build the adapter.
I've read the thing about the bios stack and tried to put the on my adapter but I can't get it to work.
The AVR I use is just fine, I've tested it with another project where I blink some LED's and measured the clock with a scope....all working fine.
I think something is wrong with the way I am hooking up the AVR.
I've done it like this:
SMS signal (D1 to D7) => AVR => genesis signal (D1 - D7)
Genesis CE => 1,5k resistor =>AVR & SMS CE
SMS RD => AVR => Genesis
SMSD0 => Genesis D0 & 1,5k Resistor to +5V
Is this the right way?
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- Joined: 11 Mar 2013
- Posts: 12
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Posted: Sat Apr 18, 2020 7:56 pm
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