[Coco] Need a FD 502 controller that can accept 28 pin roms

Darren A mechacoco at gmail.com
Wed Oct 13 02:29:33 EDT 2010

On 10/13/10, Little John <sales at gimechip.com> wrote:
> Okay - I thought that was what Darren A was saying but wasn't sure.

Yes. The FD-502 ROM socket is only wired for 8K (A0-A12).  You need to
run a jumper wire for A13 if you want to use a 16K EPROM.

The other pins which become address lines on larger EPROMS are all
tied to Vcc, thus the need to put the code in the upper-most 8K of the


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