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Its funny seeing an article on the 99/4A here on HN :) I'm too young to have had any experience with the home computer generation. A friend of mine, however, c
by yoshamano 14y ago
Its funny seeing an article on the 99/4A here on HN :)
I'm too young to have had any experience with the home computer generation. A friend of mine, however, cut his teeth on the 99/4A, and he still has a soft spot for it. So much so that his first big project he ever did with an FPGA was to recreate and expand upon the TMS9918A video chip. He finished it a year or so ago and if anyone is interested in reading about it he documented the whole thing on his site http://codehackcreate.com/archives/30 http://codehackcreate.com/archives/30
- ams6110 14y agoThe CPU in the 99/4A was interesting. It didn't have registers. It had a "workspace pointer" that pointed to a space in RAM where your "register" slots were. So you could have multiple "workspaces" (sets of registers) and switch among them by simply setting the workspace pointer. Instant new context. Much slower than real registers of course but also quite flexible.