Uploaded March 2021 | Updated September 2026, 1 week ago

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In Part 91 I described my plans for a shadow ram system that copies from a rom chip to ram to give me lots more memory flexibility. Behind the scenes I designed a small pcb to help prototype that, so in this video I solder that up and build the copy circuit.

0:00 Introduction
1:22 Schematic EDA
3:21 Unbox
4:45 Soldering
6:00 Test Code
9:14 Basic Counter
16:06 Memory Interfacing
25:09 Outro