R65 – A late seventies computer built with a KIM-1 by Rene Richarz.
An amazing showcase of how far a KIM-1 and Pascal as programming language can go!

All information on the R65 and the emulator of this computer on the github archive of Rene Richarz, a work in progress!
Including sources and full documentation.

Original Job computer built 1977-1979
The R65 computer has been built 1977-1979 by Rene Richarztogether with Rudolf Baumann, who has built his own JOB computer at the same time with similar hardware. The picture above shows the open JOB computer. The original R65 computer has not survived. The floppy disks have also not survived.

Hardware specifications of the original R65 Computer:
– 6502 8-bit microprocessor
– 1 MHz clock speed
– 17 kByte, 33 kByte, 49 kByte RAM (expanded 2 times between 1977 an 1979)
– 2 kByte graphics RAM
– 10 kByte ROM
– 40 x 16 char monochrome display
– 224 x 118 dot monochrome graphics display (switchable with char display)
– 2 floppy disk drives. Formatted capacity 199680 bytes each.
– Interfaces: Teletype, RS232, parallel printer, audio tape, golf-ball typewriter, tv

More on the R65 system here!

The DIY KIM-1 keypad case and button 3D designs have been slightly improved:

The case has a small cutout around the top edges as the original.

The button has some ribbles as the original has.

After cleaning up and repairing the keyboard of a white KIM-1 Rev D I found a second one, as new!

MTU K-1013 FDC emulation added to the KIM-1 Simulator.

Eduardo Casino added the FDC support. Now not only the SD Shield but also the upd765 based FDC support allows to run CP/M-65 and the native CODOS for KIM-1 operating systems.