TRS-80 Model I
trixter at oldskool.org
Mon Feb 5 22:47:36 CST 2007
Roger Merchberger wrote:
> The last two - the HX & EX, were all-in-one units with the keyboard
> built-into the system unit, one floppy, minimal and specialized
> expansion - maybe those didn't have DMA???
Internally they had DMA as well (there were hard drive expansions for
them at some point).
I'm pretty sure you're thinking of the PCjr, which has the distinction
of being the only IBM PC compatible that is *slower* than the original
machine due to slow RAM (first 128K) and lack of DMA. Later upgrades
added faster RAM and DMA, but on stock delivery, it was slower.
But we love our bastard children :-)
Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/
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