Rare Vintage ISA Cards, Prometheus Applesurance 3.0, DTACK Grounded Co-Processor For Sale
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Rare Vintage ISA Cards, Prometheus Applesurance 3.0, DTACK Grounded Co-Processor
Price: US $174.95
Rare Vintage ISA Cards, Prometheus Applesurance 3.0, DTACK Grounded Co-Processor. NOTE: The included box is not the original box for the cards. Since these cards are found in this box, likely they are some sort of Disk Controller for Apple II, and were upgraded/replaced with the content of the box! The following information regarding the cards are my research result! Please do your own research to find out the actual usage/kind of the card!
Up for sale is a set of two rare vintage computer cards:
Prometheus Applesurance 3.0 ISA Card (Circa 1984)
Serial Number: S/N 127-05
Features:
Two 20-pin connectors for ribbon cable interfacing.
Contains multiple ICs, including a PROM chip (firmware onboard).
Possible use: Backup system, data recovery, or custom Apple/PC device Grounded Co-Processor Card (Circa 1981)
Model: 11-093
Features:
Simple design with a focus on data transfer acknowledgment signals (DTACK).
Likely used with Motorola 68000-based systems or as an auxiliary cards were likely part of a specialized hardware solution for interfacing with Apple systems or expanding PC capabilities. They are perfect for vintage computing enthusiasts or collectors looking to restore or document historic hardware.
