Replacing 6550s

From: Ethan Dicks <>
Date: Mon Dec 7 08:57:45 1998

> On Mon, 30 Nov 1998 wrote:
> Where would you put ROM expansion? There's no empty sockets in this model
> PET.

For the few products that existed back then, the vendors supplied a sidecar
cartridge/board. It had a lead to go around the back of the PET to the
2nd cassette port. I have a crude line drawing in the manual of one of my
PET products, somewhere. My first PET was a 32K, 9" white, upgrade ROM (3.0),
so I stuffed the firmware in the available sockets.

Received on Mon Dec 07 1998 - 08:57:45 GMT

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