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I have written in earlier posts of my project to interface the FreHD hard disk emulator to my Kaypro 4/83.   The standard Kaypro ROM does not include hard disk support so a third party ROM ...
A friend from out of town was visiting so he was able to being his Kaypro II with him to we could try the Kaypro '83 FreHD SHIM adaptor. The physical arrangement of the Kaypro II PCB (81-110-n) ...
The Kaypro / FreHD adaptor uses a 28C256 EEPROM chip that contains multiple ROM images.  The active image is controlled by jumpers on the high address lines.   The challenge I had ...
Following on from the post about the development of the Kaypro / FreHD adaptors this post covers the SHIM board that I designed for the Kaypro 4/83 (81-240-n). Design objectives for the board were ...
... business machines so in addition to the TRS-80's I have a Kaypro 4/83 (81-240-n) that I picked up in early 2013 on the local auction site.  The Kaypro worked fine after the standard power supply capacitor ...

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Contact Andrew Quinn

jaquinn@ihug.co.nz http://twitter.com/jaquinn