https://github.com/amarok24/a1k-simpleclock

A neat RTC for Commodore Amiga 500 and 1000 which fits under the M68k CPU.
https://github.com/amarok24/a1k-simpleclock

amiga amiga-hardware realtime-clock rtc-module

Last synced: 2 months ago
JSON representation

A neat RTC for Commodore Amiga 500 and 1000 which fits under the M68k CPU.

• Host: GitHub
• URL: https://github.com/amarok24/a1k-simpleclock
• Owner: Amarok24
• License: gpl-2.0
• Created: 2021-02-25T17:51:54.000Z (about 5 years ago)
• Default Branch: main
• Last Pushed: 2022-06-28T10:07:41.000Z (almost 4 years ago)
• Last Synced: 2025-10-19T12:25:54.617Z (6 months ago)
• Topics: amiga, amiga-hardware, realtime-clock, rtc-module
• Homepage: https://gitlab.com/marceljaehne/a1k-simpleclock
• Size: 20.9 MB
• Stars: 4
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

          
A1k SimpleClock

===============  

This is an easy to build D.I.Y. Realtime Clock (RTC) for Amiga 500 and Amiga 1000 Computers, which\

will fit under the 68k CPU or any turboboard for 68k sockets.\

\

![Alt-Text](https://gitlab.com/marceljaehne/a1k-simpleclock/-/raw/master/Bilder/21-02-26_21-03-18_5550.jpg)\

\

For use in Amiga1000 and Kick1.3 you need a patched setclock binary.\

For use in Amiga1000 and Kick >= 2.0 you need a patched battclock_resource modul.\

All these needed files are in (A1kSimpleClock.lha)

\

\

1 * MSM62X42BGS (Clockchip),\

alternative you can use an Epson RTC-72423A instead (pincompatible and in Digikey BOM)\

\

1 * MS920SE (3V Lithium Accu Cell)\

\

These both are available at Mouser or Aliexpress, the Epson Chip is available at Digikey,too.\

\

JP1\

ON = Amiga1000\

OFF = Amiga500/2000\

\

IMPORTEND,\

IC3 needs to be an AC/ACT Type, slower types like HC or HCT won't work!\

\

**Diode orientation**\

\

D1 = Kathode on the right -->|--\

D2 = Kathode on the left --|<--\

D3 = Kathode down\

ah, btw. every SOD123 Schottky Diode with uf<=0.3V will work\

\

**DISCLAIMER!!!!**\

**THIS IS A HOBBYIST PROJECT! I'M NOT RESPONSIBLE IF IT DOESN'T WORK OR DESTROYS YOUR VALUABLE DATA OR HARDWARE!**\

\

https://mytube.madzel.de/videos/watch/4dbfa021-77f8-47c4-a0fa-2a3ab73ecad1 \

\

You can find more information at:\

https://www.a1k.org/forum/index.php?threads/77371/ 

\

\

Original Source is: https://gitlab.com/marceljaehne/a1k-simpleclock/