Memory Plus manual and photo

Thanks to Dirk Dral, an old friend from the days of the Kim Kenner Club, with articles in KIM Kenner 13 and 16 (traffic control, cassette Interface) I have published a quality photo of his Memory Plus and a quality scan of the manual.

He also sent me photosof his KIM-1 and the Radio Bulletin RAM and EPROM cards.

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Z80 Elektor articles

A new Elektor page in the Z80 department: Z80 CP/M with ROM (thanks Martin Seine!)cards for the Elektor EC65 bus, mini card, universal card.

PAL-1 extensions

Motherboard 6 slot, 32K RAM , second 6532 board, now on Tindie for the PAL-1 (and Micro-KIM)

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NOP testers

I built two NOP testers, simple standalone devices to do a simple sanity check test if this CPU is at least doing something that can be expected. Not a thorough test of speed, instructions, all address lines or datalines or control lines. 

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CM630P 6502 clone

CM603P, a 6502 by MICRO ELEKTRONIKA BULGARIA. Used in Apple II clones like Pravetz-82 and IMKO-1 and Oric Atmos clone Pravetz-8D. Not an official 6502 licensed CPU. Pinc compatible, can be used in 6502 systems without issues.

Added to my 65XX IC collection.

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VDU card for Junior with OS65D

Philippe Roehr has remade a VDU PCB as featured in the Elektor Junior articles and put it to work with his OS65D system.

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KIM-1 clones and replica’s

The KIM-1. my first computer. Still have it, and it is still operational.

But I fear to use it for experiments and daily use, it is too valuable for me.

So I invested in KIM-1 clones and replica’s:
– Micro-KIM by Vince Briel
– KIM Clone by Bob Applegate, Corsham Technologies
– MOS KIM-1 Reproduction by Dave Williams
– KIM Uno by Oscar Vermeulen

Each has it advantages. And not all are still for sale.
Corsham is till in business and has an awful KIM Clone, with motherboard, I/O card, experimenters board and SD file system. A real enhanced KIM-1 on real KIM-1 hardware.
The KIM Uno is also available, affordable,now an emulator on an Arduino, soon on ESP32. Fun to have a KIM-1 look and feel.

All are documented on the KIM-1 replica’s and clone page.
KIM replica’s and clones



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Apple 1 Replica’s

I have two Apple 1 Replica’s, the Vince Briel Replica 1 SE and the Achatz A-ONE.
Both have a 6502 and a 6821 and the original software. Video generation sid one in a affordable modern way, so not real clones.

Fun computers to work with, the first ‘personal computer’ in a very primitive format!

Pages with information on teh Apple 1 and these Replica’s

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Another Junior build by Philippe Roca

Another Junior build! By philippe Roca. Faithful reproductions, including EPROM 2708 and PROM 82S33 programmers.

Photos and gerbers of some PCB. Work in progress, I hope to see more photos and Gerbers!

Build an Elektor Junior

Page on building now an Elektor Junior.
Two designs complete with PCB design (Bram Prosman), reports of a complete build ( Philippe Roehr, Philippe Roca).