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Total: 14 results found.

... Model 1 FreHD Interface and found that the Shift Keys had stopped working.     Failure of individual keys is a pretty normal occurance on machines this age.  Failure of a single ...
Fred Vecoven's FreHD Hard Disk emulator has been a very popular upgrade for TRS-80 Model 3 and 4 users since its launch in 2014.   If you have a Model 1 with a Radio Shack expansion interface ...
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 ...
Following on from the post about the Model 4 FreHD installation, here are a few pictures showing the installation of a FreHD Hard Disk Emulator in my TRS-80 Model 4P. The mounting chassis is the ...
A few pictures showing the installation of a FreHD Hard Disk Emulator in one of my TRS-80 Model 4's. The mounting chassis is the frame from a dead Seagate ST4766N hard drive.  I picked ...
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 ...
The thing that struck me when I initially got involved with Fred Vecoven to test the FreHD was the potential for the device to be used on machines other than the TRS-80.   The FreHD emulates ...
... design.  This is particularly true for the expansion bus on the back of the machine and the design of the expansion interface. This difference in expansion design means that the FreHD cannot ...
So with a power supply, working power switch, restored Expansion Interface and a suitable case, things were looking good for a quick test of the Model 1 / FreHD adaptor and move on to the next project. ...
Included in Ian's box of "things from the junk box" for FreHD testing was a Model 1 Expansion Interface PCB. Ian tells me that a common problem is people shipping Expansion Interfaces with ...
With the success of the FreHD on the TRS-80 Model III and 4 it was time to start testing on the Model 1. The first step was finding a Model 1 and Expansion Interface.  While they may ...
... with modern accessories like the FreHD but still retain as much of the original operating experience as possible. Both my machines are in the "standard" New Zealand 64k configuration and I don't ...

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Contact Andrew Quinn

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