exxos's Atari, Amiga & retro forum

I am looking to upgrade the TOS in my 520STFM, it has a C103253 Rev 1 motherboard with 2 x RP231024 mask ROMs, (28 pin)

It would seem to me fairly straight forwards to use a pair of small adapter boards 28 pins -> plcc32 socket tracked for a 27C010 EPROM or ATF39SF010 are there any such designs arround or are there any issues (height etc) with doing this. I note that there are several pcbs avaialble that plug into both chips so are motherboard specific.

Thanks

Peter

Given the ROMs are under the PSU on that mainboard, you might find yourself a bit short on space, especially if your adapter boards will be plugging into sockets, and will have sockets on themselves.

I think you'd be just as well adding the extra 4 sockets and using 27C256s. Just my opinion.

Adapters under the power supply generally do not work because of height restrictions. As RJ says, 6 chip TOS is probably the simplest method.