I recently acquired a good looking KIM-3B myself. Nothing new, all is already known about it. Now with photos made by myself!

The KIM-1 Interface permits easy access to the input/output ports on the KIM-1. Other connections such as power, ground, tape recorder input and input and output are accessible by solderless connectors.

Scroll, copy paste of the console.

New versions of KIM-1 and TIM Simulator with thanks to Eduardo Casino.

It looks like an ASCII keyboard with more function keys (F1-F8) than usual.
Production date is probably not before 1984 since the ICs have date codes from 1983.
No documentation or description is known.

On the PCB you see:

1. The MC6802, an 6800 with 128bytes RAM and an internal clock oscillator
2. The 74LS138 glue logic IC
3. A 74LS14 with a potmeter and capacitor
4. A MC145028 dual flip flop with some resistors and capacitors, perhaps a clock oscillator
5. 2x MC6821 PIAs to sense the keyboard matrix and presumably serial I/O via bit-banging.
6. A K1/K2 connector, where three wires are connected. One wire goes to a pin of the 6821 PIA, the other two are power supply 5V and ground.
   When a key is pressed, the 6821 pin goes to 0V, so it looks like a (poor mens) rs232 signal.
7. A keyboard matrix with many extra keys (F1-F8, cursor keys, CHAR Insert/Delete, numerical keyboard.

	MTU K-1008 Visable Memory KIM-1 Introduction
	MTU Catalog October 1978 A1
	INSMUS-8 INSNOTRAN Music compiler
	Datamover-256 Hardware Manual 1982-06 Rev A
	MTU-130 MACASM Release 1.2 User Manual 1982-10
	Preliminary KGP Doc
	MTU K-1032 Banker RAM ROM manual Rev E

Optional Software (added May 2026, thanks VintageTech again)

• Distribution Disk 1.4 1982 – MACASM
• Distribution Disk 1983 – Wordpic 1.0 NEC 8023 Printer Version
• MTU-130 User Group Disk 3
• MTU-140 User Group Disk 5
• Option Software Disk 1.6 1984 – MTU-Forth79 2.1 – fixed
• Optional Software Disk 1.0 1982 – DMXMON
• Optional Software Disk 1.0 1982 – Wordpic
• Optional Software Disk 1.2 1982 – MTU-C
• Optional Software Disk 1.6 – MAGIC-L Language

I have populated a replica PCB with as much as I have in my junk boxes ‘time period correct’ parts. It does look good compared to photos of the original Jolt.
I am waiting for a ‘white’ 6502 to arrive, the purple one is already period correct.
This Jolt is meant to be a ‘museum’ part and will end up above my desk next to an original SuperJolt.
The next Jolt I will build will be a functional one with ‘black’ ICs and less attention to perfection.

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!

He updated his archive on github with a PCB for a low cost variant.