ZX81 rom adpater for AT28C128/AT28C256-JU

author: CyberSwindy
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2 layer board of 0.85 x 3.20 inches (21.6 x 81.3 mm)
Uploaded: January 26, 2022
Shared: June 29, 2022
Total Price: $13.60

Adapter board for zx81 (issue 3), for AT28C128-JU/256-JU. This board is a through-hole solder version, enabling easy soldering, whilst making use of PLCC packaged eeproms. As the eeproms support more than the 8k, up to 4 ROM images can be burned, and selected by pin headers.
I designed this as I could only source PLCC packaged EEPROMS (due to the “chip” shortage), but could not find an adaper supporting these chips.

Adapter board for zx81 (issue 3), for AT28C128-JU/256-JU. This board is a through-hole solder version, enabling easy soldering, whilst making use of PLCC packaged eeproms. As the eeproms support more than the 8k, up to 4 ROM images can be burned, and selected by pin headers.
I designed this as I could only source PLCC packaged EEPROMS (due to the “chip” shortage), but could not find an adaper supporting these chips.

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