Brand New KIM-1 with fpga 6530 RRIOT

A close friend of mine and also a neighbor Paul Sajna has been poking at the verilog for an FPGA 6530 that fits in the footprint of the original. The board was created by Dag Lem and kind was an offshoot of Dag Lem’s fpga SID

Paul and I have been building replica KIM-1 boards and I put together some of the late Bob Applegate’s 6530 daughterboards and Paul got his booting with the daughterboard.

Not long after, Paul got the fpga RRIOT working in his KIM-1 which is very slick!

I can’t tell you how delighted I was to see Paul’s KIM-1 come to life in new form with the replica PCB put together by Eduardo Casino and all new passives, 6502, SRAM and various logic gates and keyboard PCB. Great job all!

The KIM-1 was by chance my first computer as a child. My father took an Engineer’s course on microprocessors in Vancouver BC circa 1979 and as part of the course he could take home the KIM-1 used in the course. He gave it to me and the rest is history. :wink:

Links

https://blog.paulsajna.com/fpga-mcs6530-rriot/

Note: the fpga 6530 verilog code is still beta, as not all functions have been fully tested but the RAM/ROM and basic PIA is working well enough to boot up a KIM-1.

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Always good to see a KIM-1 and a remake, but that 40-pin DIP module is a really nice retro platform: Lattice FPGA, two 20-way level shifters, 3V regulator, 5V tolerant. And open source too!

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Digging around to see what a 6530-xxx is, I found you can get FOCAL for the kim.

Indeed, @HansOtten posted here:
Focal-65 V3D reconstruction, from listing for KIm-1 and TIM