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The Amiga Future 153 will be released on the 4th November.

The Amiga Future 153 will be released on the 4th November.
The Amiga Future 153 will be released on the 4th November.

The Amiga Future 153 will be released on the 4th November.
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A1200_keyb_MPU: DIY replacement for A1200 keyboard MPU

Published 22.11.2021 - 08:39 by osz

A1200_keyb_MPU: DIY replacement for A1200 keyboard MPU

The Motorola 68HC05 is a microcontroller that is used in the Amiga 1200 under the chip designation 391508-01 to control the keyboard. If this chip breaks, a replacement must be found. Since the prices for these chips are now increasing more and more, Oleg Mishin would like to ensure a more cost-effective replacement with his project A1200_keyb_MPU. The project consists of a tiny circuit board on which some components are soldered, which itself is soldered to the mainboard instead of the original chip. Its heart is the 8-bit microcontroller ATMEGA324PB-20MU, which can be programmed using an STK500 programmer on an ISP interface and AVRdude, for example. With a little manual work and manual skill, you can get a replacement chip as a do-it-yourself project that requires neither a quartz nor a voltage monitoring IC to operate and can be updated in terms of software in the future.

The A1200_keyb_MPU project by Oleg Mishin is located as a GitHub repository at the following address: https://github.com/OlegMishin/A1200_keyb_MPU
News Source: GitHub

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