[TUHS] merry christmas

Peter Jeremy peter at rulingia.com
Wed Dec 28 17:14:22 AEST 2016

On 2016-Dec-25 17:21:31 -0500, Steve Nickolas <usotsuki at buric.co> wrote:
>On Mon, 26 Dec 2016, Nick Downing wrote:
>> I became frustrated with the limitations of both UZI and NOS and decided to
>> port 2.11BSD to the cash register as the next step, my goal was (a) make it
>> cross compile from Linux to PDP-11, (b) check it can build an identical
>> release tape through cross compilation, (c) port it to Z80 using my
>> existing cross compiler.
>A Z180 is powerful enough to run 2.11BSD? o.o;

I suspect shoe-horning 2.11BSD onto a Z180 would be difficult - 2.11BSD
on a PDP-11 requires split I+D and has kernel and userland in separate
address spaces.  Even with that, keeping the non-overlay part of the
kernel in 64KB is difficult.  Equivalent Z180 code is going to be much
larger than PDP-11 code.

I'd be happy to be proved wrong.

Peter Jeremy
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