Here’s something fun from our hacker [Piers]: Software Defined ROMs.
In this series of three videos, [Piers] runs us through what a software defined ROM is, how to make them, and then how to use them.
As [Piers] explains, one frustration a retro technician will face is a failed ROM chip. In the era he’s interested in, there are basically three relevant kinds of ROM chip, all 24-pin Dual Inline Package (DIP):
- 2364 ROM chip: 8KB; 1x chip-select line
- 2332 ROM chip: 4KB; 2x chip-select lines
- 2316 ROM chip: 2KB; 3x chip-select lines
