Only two new ones today:
- KIM-1 I/O Board
- KIM-1 64K RAM/EEPROM
So far I have not been overrun with orders for kits, so this is working out well.
Month: November 2021
More Kits!
Due to popular demand I have added kit versions of more boards:
- SS-50 64K RAM Board
- SS-50 65C02 CPU Board
- SS-50 6800 CPU Board
- SS-50 6809 CPU Board
- KIM Clone
The SS-50 64K RAM board is easy to assemble and probably needs no tools other than a low wattage soldering iron and good solder, not the junk sold at the local hardware store, please. I highly recommend Kester 331 as the flux washes off with hot water. A clean looking board sure beats one that has gobs of flux all over it.
The SS-50 65C02 and 6800 CPU boards are more complex but usually work the first time power is applied. The designs are very forgiving and there are few parts.
The 6809 and KIM Clone boards are much more complex and have a lot more components. 6809 boards tend to be the most difficult ones to get running, usually because of a bent pin, jumpers not set right, etc. There is no way to unit test it either; build the board and hopefully it works. If not, plan on spending time with the schematics, a scope and maybe a logic analyzer.
The KIM Clone is built and tested in pieces so it’s easy to find where the problems are. It is extremely rare that one does not work immediately when each section is tested after completion (power supply, USB interface, CPU running with TTY interface, LEDs, then keyboard). The buyer should follow the build process I have on another page, not just solder everything on the board and then see if anything works.
Note that not all parts are tested, so if you thing a bad part has arrived just let me know and a replacement will be sent.