IBM 5150 maximum memory?

Eric Smith eric at
Sun Apr 27 14:06:06 CDT 2008

Roy wrote:
> For that matter,  why not shove most of CP/M into ROM?

You've just reinvented the Intel 80150 "Operating System Processor".
The Intel 80130 and 80150 contain 16KB of masked ROM, three timers, and
an interrupt controller.  The 80130 ROM contains the iRMX-86 kernel;
the 80150 ROM contains CP/M-86.


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