True, for OG cart users... For multi Boyz its pointless.UniBIOS is still useful for those of us that like to collect and play original MVS carts.
awesome, my MVS has a socketed bios so ill keep that info noted when i get going. Thanks @twistedsymphonyMVS that use a socketed bios are typically a: 27c1024
I’ve usually got a few of those exact proms kicking about. Well, I have, so I gave one a go out of curiosity and had no problem burning the UnIBIOS rom first time. I’m only using one of the cheap and cheerful USB TL866II Plus programmers. Though I can’t complain about it, it’s served me well and done everything I’ve asked of it so far, from the BBC Micro up to the, well, Neo Geo now I suppose.Digikey sells one-time programmable EPROMS that are compatible:
https://www.digikey.com/product-detail/en/AT27C1024-70PU/AT27C1024-70PU-ND
I got one to write successfully with my GQ-4X and the ADP-054 adapter. It's working in my 2 slot.
I had issues with the programmer not reading in my written chip consistently, so it failed verification upon writing. On the ADP-054 adapter, I set J5 jumper to the 2-3 position and it cleared up the reading issues, and I verified that the chip was written successfully, which is good since it's a one-time programmable chip...![]()
Awesome! I didn't even consider trying that. Does that work without an adapter for these?USB TL866II Plus
Awesome! I didn't even consider trying that. Does that work without an adapter for these?USB TL866II Plus
Those seem to do a decent job. I actually had a computer bios chip (not remembering part number of form factor off hand) I wanted to program in the GQ-4X, but the adapter needed was crazy expensive. I found a TL866II Plus with adapters included for less than just the adapter I needed for the GQ-4X, and it worked out for me. I guess I give preferential treatment to the GQ-4X if it and the adapters I have are compatible, since I paid so much more for it...![]()
I've never tried it but the 40pin limitation is a big no-no for me.For anything that's 40 pins or less, the TL866 is an absolute performer. I prefer it in many ways to my Xeltek Superpro that was 10 times as expensive.
The T56 would suit you better, it’s more versatile having, as the name suggests, 56 pins. It’s probably going to be my next purchase as an upgrade from the TL866.I've never tried it but the 40pin limitation is a big no-no for me.I burn 42pin devices a lot for repairs (basically any graphic or sample ROM from the mid 90s is 42pin).For anything that's 40 pins or less, the TL866 is an absolute performer. I prefer it in many ways to my Xeltek Superpro that was 10 times as expensive.
I know you can do them on the TL866 with the proper adapter in multiple passes but that's too cumbersome for me.