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Address Decoders for Stack Memories

A project log for ED-64: A discrete 8-bit computer

ED-64 will be an 8-bit computer built with discrete components, and will feature a ferrite core memory (documented as a separate project).

andrew-starrAndrew Starr 09/22/2015 at 08:480 Comments

The Data and Return Stacks will each consist of a 64-byte ferrite core array. 64 bytes requires a 6-bit pointer to address the stack contents. This 6-bit pointer must be decoded to select one of 8 columns and 8 rows in the core matrix.

Below is a closeup of some of the edge connectors I will be using throughout this project. They are 44-pin Multibus II connectors from Digikey:

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