Johnny's homebuilt 8080 CPU corner (and other stuff, maybe)


8080 CPU, built using 74HC-logic

March 01, 2018



It's done!


I now have a fully functional CPU hardware emulator that runs at 2 MHz, can execute all opcodes and also feature interrupt logic/functionality.



Top left are the CONTROL section.

To the right we have two sections, REGISTERS at top right and in front the ALU.


To the left I have attached a BUS system I call XBUS. On it there are a 64K SRAM and a memory editor that via RS232 can edit the SRAM. That pcb has been named RatNest.


The breadboard are a small testbed for the IN and OUT opcodes.

I will update these pages with more details as time permits.

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