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In 1981, IBM released the Personal Computer, model number 5150. Unlike IBM designs of the era, it was based on off-the-shelf components. While this meant that it was relatively cheap to manufacture, it also meant that anyone could manufacture a clone board because all components were readily available in the open market. However, the only […]

Computer Memories, Inc. (CMI for short) was selected by IBM to be the source for the AT’s hard drive. The model in question was the CMI 6426-S, with a capacity of about 20MB formatted (21MB unformatted). In the BIOSes of the era this was a “type 2” drive, with 615 cylinders, 4 heads, and 17 […]

Welcome to my blog. This is where I may write about what I’m currently doing, if I think it may be interesting to others. This will usually mean writing about low-level Linux stuff, plus some software-engineering-related topics. Hope you like it!