On 1/25/21 10:27 PM, Mike Loewen via vcf-midatlantic wrote:
Some weeks ago, I pulled out my Heathkit H19 monitor to connect to my H8, and the H19 promptly blew a fuse (and other nasty things). I finally got the last parts in today to fix it, and the H8 is up and running CP/M 2.2.04 from a Z87 dual-drive unit.
http://q7.neurotica.com/Oldtech/Heathkit/H8/H19H8-2L.jpg
The H8 only has two boards installed: the H17 hard-sectored floppy controller, and a Z80 board from a recent Norberto Collado design. The Z80 board has 64KB of RAM, two serial ports and a real-time clock. Here's the design:
http://koyado.com/Heathkit/H8-Z80-64K-RTC-ORG0-V3.html
Norberto also has a new storage controller design, to replace the H37 (soft-sector), H17 (hard-sector) and H67 (hard drive) controllers, plus a USB interface. I have the PCBs, and am waiting for some final testing before ordering parts.
Very nice! I have one of Norberto's V3 boards as well, but I've not yet built it out. My personal H8 is currently running with its original Heath 8080 CPU board. -Dave -- Dave McGuire, AK4HZ New Kensington, PA