Elektor Junior Paperware 3 in German!

Thanks to Martin Seine I have added the Paperware 3 in German book to the Junior book collection.


Elektor 6502 clock

In 1981 and 1982 the magazine Elektor (Elektuur) published a small 6502 system. Small since it only contained a 6502, a 6532 RRIOT and a 2716 2K EPROM and some logic IC’s and powersupply, all on a small PCB.
Several applications around this baord were publsihed, like a DCF77 clock, a general purpose clock, and a darkroom computer. Also a talking clock baord, around the speech IC UAA1003 was published.

Recently I obtained a DCF77 talking clock system, and I took it apart and cleaned it up to experiment with the boards, and I do not want to use the heavy lineair power circuits anymore. See the bottom of the page how it looked in the original form.

Circuit of CPU module, 6502, 6532, 2716, clock, power supply, decode logic

LEDs and keyboard of clock module

LEDs and keyboard of darkroom module

CPU board

Talking clock with UAA1003

LED and keyboard of talking DCF77 clock

Talking clock circuit UAA1003

Memory map

Memory map, only decoded up to A11, so everything is mirrored in the 64K memory space in 4K blocks.

0000 - 007F zeropage/stack
0080        6532 registers
0400        latch 4 bit output
0800 - 0FFF 2k ROM 2716
FFFA - FFFF vectors in ROM

Magazine articles

Elektuur/Elektor published the articles around this 6502 system in 1981 and 1982. Not all were published everywhere. The DCF77 clock was not published for example in the UK (and that makes sense, nor reception there from Frankfurt). Only in the Dutch articles, sources were published in addition to the hex dumps of the firmware.
Here the scanned articles

Dutch articles:
– DCF77 clock
– Alarmclock with listing of sources
– Doka computer
– Errors in articles
German articles:
– DCF77 clock
– alarm clock
– Duka Clock
EPROM image

Elektor clock EPS-82137_ checked
English articles:
– 6502 housekeeper
– Talking clock
– Darkroom computer
UAA1003 ITT datasheet

Listing of DCF77 clock

Listing of changes for alarmclock

Original DCF77 housing


PC utilities updated

The PC utilities page has seen an update of th4 Conversion hex formats utility.

Programs to manipulate the binary and hex formatted files of interest for SBC owners. Intel hex, MOS papertape, Motorola S-record, binary, hex conversion fort eh 8 bit world.
Runs on Windows, Linux, Mac due to Lazarus and Freepascal. Source included.


Elektor Computing 5 German

Thanks to Martin Seine I have added the German evrsion of Elektor COmputing 5, dedicated to the EC65 systen, Z80 card, 65818 etc.

And have a look at the EC65 Z80 card page also



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.


Multi-purpose Z80 card

Universal Multipurpose Z80 card. Elektor 1992.

Universele Z80 kaart deel 1 en 2 Dutch
Multi-purpose Z80 card part 1 (English)
Multi-purpose Z80 card part 2 (English)

Mini Z80 System

A very small but versatile Z80 system. Elektor 1992.

Mini Z80 System
RAM extension for Mini Z80 System

EPROM Programmer for Z80

Simple EPROM  programmer for the Z80 for 2716EPROMs. Published in January/February 1984.

Scan in Dutch, German and English.






EC65(K) Z80-card: CP/M on Octopus

Z80 CPU card for the EC65(K) Octopus system, to run CP/M

CP/M Z80 card articles in Dutch from EC 5

The German text is in Elektor Computing 5.

Z80_EPROM.bin EC65 Z80 card ROM
The original EPROM was 2732, the image is for 2764.
But it is just twice the code, so that upper address line does not matter.

Z80-A CPU Card 1982

Z80-A CPU card articles in Dutch, German and English May 1982