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Proof of concept - CDP1802 compatible CPU

A project log for Microcoding for FPGAs

A microcode compiler developed to fit into FPGA toolchain and validated to develop CPU and text-based video controller

zpekiczpekic 05/30/2020 at 18:001 Comment

Before digging into the implementation which can be found here, why 1802?

For better understanding of the 1802 CPU from the "black box" perspective (and especially to understand its states during each instruction execution) it is useful to look at the data sheets as a refresher: 

http://www.cosmacelf.com/publications/data-sheets/cdp1802.pdf

http://datasheets.chipdb.org/Intersil/1805-1806.pdf

Going inside the box, here is the great reverse engineering description:

http://visual6502.org/wiki/index.php?title=RCA_1802E

(to be continued...)

Discussions

zpekic wrote 06/09/2020 at 05:41 point

A very bad video, but shows the basic working of the system https://www.youtube.com/watch?v=CQuC0hO-Ga4

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