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I am working on a Z80 replica in 180 nm and would love some ideas and sketches for the Free and Open Source Silicon (FOSSi) Z80 logo - to "bake" it directly int

by __rej__ 9mo ago

I am working on a Z80 replica in 180 nm and would love some ideas and sketches for the Free and Open Source Silicon (FOSSi) Z80 logo - to "bake" it directly into the silicon on the chip! Here are some cool examples of the chip art: https://hackaday.io/page/11717-chip-graffiti-hilarious-arts-of-integrated-circuits https://hackaday.io/page/11717-chip-graffiti-hilarious-arts-... This Z80 replica will be manufactured with the new https://wafer.space https://wafer.space service.

java-man 9mo ago
Is it possible to place some low power SRAM and flash/EEPROM on the same die as well?
- __rej__ 9mo ago
  It is a very good idea about SRAM! Around 16KB of SRAM can fit on the die (Wafer.Space provides 20 mm^2 area per chip) - that could be useful for both fixing old computers like ZX Spectrum and handy for turning Z80 into a tiny MCU. However Flash/EEPROM is currently out of the question. I don't know of any open-source versions available. That would have been a very serious undertaking on it's own!
  - java-man 9mo ago
    Maybe 64k or even more with 2-transistor SRAM cells like those described in https://ieeexplore.ieee.org/document/8993520 https://ieeexplore.ieee.org/document/8993520 ?