Open Hardware SNES Repro PCB with FeRAM support

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Oxinar
Posts: 2
Joined: Tue Mar 30, 2021 3:43 am

Re: Open Hardware SNES Repro PCB with FeRAM support

Post by Oxinar » Tue Mar 30, 2021 3:51 am

RetroSwim wrote:
Sun Mar 28, 2021 4:40 pm
I've sent a DM to soniccd, but in a nutshell, it turns out my TL866 adaptor was to blame.

It allows you to program the 32Mbit EPROM in 4Mbit chunks. The A18-A20 selection logic was wired contrary to the silkscreening on my adaptor, so while each 4Mbit chunk was written correctly, they were written in the reverse order.

So with a combination of a byteswapped ROM, and operating my adaptor "correctly", I now got soniccd's board to work.

:)
Hi, I think I have this same problem, no matter what configuration I use, the game just doesn't work and I think the problem is with the adapter I use.
You couldn’t kindly post a picture of the adapter you use, maybe it’s the same one I use, and since you’ve managed to solve your problem, this may be the light at the end of the tunnel I need to make the blessed EPROM work.

RetroSwim
Posts: 11
Joined: Tue Mar 09, 2021 4:09 am

Re: Open Hardware SNES Repro PCB with FeRAM support

Post by RetroSwim » Tue Mar 30, 2021 6:45 pm

Oxinar wrote:
Tue Mar 30, 2021 3:51 am
RetroSwim wrote:
Sun Mar 28, 2021 4:40 pm
I've sent a DM to soniccd, but in a nutshell, it turns out my TL866 adaptor was to blame.

It allows you to program the 32Mbit EPROM in 4Mbit chunks. The A18-A20 selection logic was wired contrary to the silkscreening on my adaptor, so while each 4Mbit chunk was written correctly, they were written in the reverse order.

So with a combination of a byteswapped ROM, and operating my adaptor "correctly", I now got soniccd's board to work.

:)
Hi, I think I have this same problem, no matter what configuration I use, the game just doesn't work and I think the problem is with the adapter I use.
You couldn’t kindly post a picture of the adapter you use, maybe it’s the same one I use, and since you’ve managed to solve your problem, this may be the light at the end of the tunnel I need to make the blessed EPROM work.
Image

Oxinar
Posts: 2
Joined: Tue Mar 30, 2021 3:43 am

Re: Open Hardware SNES Repro PCB with FeRAM support

Post by Oxinar » Wed Mar 31, 2021 9:44 pm

RetroSwim wrote:
Tue Mar 30, 2021 6:45 pm
Oxinar wrote:
Tue Mar 30, 2021 3:51 am
RetroSwim wrote:
Sun Mar 28, 2021 4:40 pm
I've sent a DM to soniccd, but in a nutshell, it turns out my TL866 adaptor was to blame.

It allows you to program the 32Mbit EPROM in 4Mbit chunks. The A18-A20 selection logic was wired contrary to the silkscreening on my adaptor, so while each 4Mbit chunk was written correctly, they were written in the reverse order.

So with a combination of a byteswapped ROM, and operating my adaptor "correctly", I now got soniccd's board to work.

:)
Image
:shock: That's the one I use, can you please give me the dip switch configuration you used?

RetroSwim
Posts: 11
Joined: Tue Mar 09, 2021 4:09 am

Re: Open Hardware SNES Repro PCB with FeRAM support

Post by RetroSwim » Sat Apr 03, 2021 6:29 pm

Literally just the opposite of what you expect.

DIP SW - 1-2-3 -- 1=ON
Bank 0 - 1-1-1
Bank 1 - 0-1-1
Bank 2 - 1-0-1
Bank 3 - 0-0-1
Bank 4 - 1-1-0
Bank 5 - 0-1-0
Bank 6 - 1-0-0
Bank 7 - 0-0-0

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