Linked by Kroc on Thu 24th Aug 2006 20:26 UTC
OSNews, Generic OSes GEOS managed to offer nearly all the functionality of the original Mac in a 1 MHz computer with 64 Kilobytes of RAM. It wasn't an OS written to run on a generic x86 chip on a moving hardware platform. It was written using immense knowledge of the hardware and the tricks one could use to maximise speed. Note: After a small break, here is another one of the articles for the Alternative OS contest.
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2600/Intellivision Correction
by martyg on Mon 28th Aug 2006 19:52 UTC
martyg
Member since:
2006-08-28

"GEOS was coded by Dougherty's elite team of programmers, who had cut their teeth on the very restricted Atari 2600 and Intellivision games consoles of the time (usually 4 KB RAM). "

Actually this is incorrect. It wasn't anywhere near "usually 4kb" RAM, and the author might be confused by the ROM address space for cartridges (which was 4kb and up with bankswitching).

The 2600 had 128 bytes of RAM (yes, that's bytes not kb). Later in its life, some companies added their own ram in to their carts effectively doing calculations and such on board before sending it for display on the 2600.


The Intellivision had about 2kb of RAM *if* you add up the regular ram plus graphics and scratchpad ram. Otherwise the main ram was 704 bytes.

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