(This page is still under construction.)
The Positron 9000 computer ..... in England.
Positron 9000 features:
The October 1982 issue of Personal Computer World (PCW) magazine published a lengthy review of the Positron 9000. It sounds like only OS-9 Level I was available at the time of this review, but the machine was designed especially to run Level II.
Looking at these pictures and ROM dumps, I counted approx. 184 ICs on the huge main PCB and another 90 on the large keyboard PCB. That totals 274 ICs! It must have been very expensive to manufacture this computer.
It uses from 1 to 8 of the Motorola MC6829 Memory Management Unit (MMU) chips, which Motorola never put into volume production. The MC6829 app note makes for some interesting reading.
Thank you to Mike Miller who pointed me to information on this very rare computer.
Søren Roug has posted the source code for modules OS9p1, OS9p2, and IOMan for OS-9 Level 2 V1.2 for the Positron 9000. He also has an HTML version of the PCW review.More information:
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