More on CUBIX - Was: newbie building a scratch-built computer

Ok - I'm terribly busy at the moment, but over the next few months I'll try and organize some material for a "build your own classic computer" section on my site. The number of people who express interest will determine to some extent how agressively I try and make time for it... There's a few changes I should probably make to the design as well. It was originally designed with a 74138 as the primary memory decoder with an 8K (2764) EPROM at the top, 8K of I/O space at the bottom, and 6 6264 8K SRAM chips for 48k of main memory. Nowadays it would make more sense to use bigger SRAMs (at least 32k) and moving the I/O to the top would simplify decoding. I could also shrink the area reserved for I/O and increase system memory. Probably also time to update the design to use a 3.5" diskette drive. Dave -- dave06a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.classiccmp.org/dunfield/index.html