[Coco] 24-pin ECB ROM Part #

[Boisy G. Pitre]

Hi everyone,

I resurrected an old CoCo 1 that was in one of my storage cabinets. It was a reject from a previous Fest that I picked up. After taking it apart and cleaning both the motherboard and case, then changing out some bad RAM chips, it’s purring like a kitten. I even replaced the old MC1741 op-amp with a newer TI one that allows me to now use DriveWire at 57.6K speeds like a CoCo 2.

The only thing that this CoCo 1 doesn’t have is Extended Color BASIC. The motherboard holds two 24-pin ROMs, one of which is Color BASIC. The other socket is empty.

Does anyone know the part number stamped on the 24-pin ECB ROM?