Posted By
SukkoPera
on 2024-12-30
11:55:59
|  Plus4i8255 - Intel 8255 Interface
I know I'm late, but please welcome my first Xmas present for you this year!
This is Plus4i8255, an Intel 8255 Interface based on the article published in Rádiótechnika 1988/12 by Ferenc Garay and Dr. János Rohonczy with a few improvements: the board has been made much smaller, the ICs doing address decoding have been turned into a GAL for easy reconfigurability (both GAL20 and GAL22 are supported) and pull-up resistors have been added on all inputs.
As usual, the board is a 100% open project and if you want a PCB, just ask! 
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