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Re: A simple cpufreq(9)

On 09/29/2011 02:50 PM, Mouse wrote:
The cache and mmu are probably harder than the cpu :-)
I'm not sure the PDP-10 even _had_ cache; I'd have to do some digging
on that score.  And I have no idea what it had for an MMU.  The only
non-power-of-two-word-size machine I've ever actually used, as far as I
can recall, was a PDP-8.  I'm interested in NetBSD/pdp10 less for
personal nostalgia value than for the code cleanup it would enforce.
I did a basic implementation of PDP10 instruction set in Verilog a few
years ago for a Xilinx FPGA, using only on-chip memory.  which made
it easy.  The tricky part is the memory management which is quite odd
on all PDP10 CPUs (and totally different between them!).

-- Ragge

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