Hack the M20

In this section, you will find several hardware and software tricks which could be useful when using the Olivetti M20.

Building an APB 8086 clone for the M20 in 2024
Scott Baker's YouTube Channel
Jumper settings for the Olivetti M20
The Olivetti M20 schematics
The black and white video cable connection by Davide Bucci
An 8 bit ISA to M20 converter by Davide Bucci and Christian Groessler
Modifying RAM expansion cards by Dwight Elvey
Making a 384KiB memory expansion, part I by Davide Bucci
Making a 384KiB memory expansion, part II by Davide Bucci
Configure the mainboard for 128KiB expansion cards, by Davide Bucci, Dwight K. Elvey and Andreas Senk
Description of the M20 RAM mapping by Dwight Elvey
Connecting a hard disk to the M20 by Dwight Elvey
128kB RAM B/W expansion schematics
Using an Olivetti DSM1219 monitor on the M20 by Carlo Merlano
The M20 firmware by Davide Bucci

Page log

Oct. 6, 2024, Changed the title of the M20 firmware page (was Description of the M20 bootstrap procedure).
Feb. 12, 2024, Added article about the APB 8086 clone.
Jul. 26, 2023, Added page about jumper configuration.
Jul. 24, 2023, Added the links to high resolution scan of the schematics.
2005-2007 First versions of the page.

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