North Star Horizon Diskette Catalog

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	by Bill Degnan - 07/08/2008 14:20
The second processor card died, which means that either I am simply unlucky or there is an electrical problem causing the processor cards to get fried. I am going to test the voltages being generated by the power supply, and the processor card's 7805 resistors. It's possible that they need to be replaced, and being of the same age, both fried with extensive use. I was able to make it through over 100 diskettes and test them all for data, OS boot, programs of all sorts. A higher percentage of disks work than I expected. These are the 10 hard-sector disks, but they are fully readable using the Northstar MDS controller and a Tandon 100 2a drive. NOTE: I have three or four NS MDS controllers including a new one I built myself from a kit. I am reasonably confident that the drives, the controller and the terminal are working. New Pictures (note file date 7-8-08) Reply

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