On 2025-10-24 2:23 p.m., Cameron Kaiser via cctalk wrote:
OS level caching of disk devices is a gennable option in M+ with split I/D.
Oh, *disk* caching! Sorry, I read that as *processor* cache. That makes sense.
That did seem to speed things up too,as well.
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From the PDP-11 FAQ.
Fastest PDP-8
Trivia item: did you note anywhere that the 11/60 was used to implement
the world's fastest PDP-8? The 8 support group for years used an 11/60
RSTS system down the hall, running custom microcode addons to implement
a high speed PDP8 emulator.
Rumour has it that some hacker also did this on a VAX-11/780, which
would definitely out-run the 11/60 version.
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I wonder if the custom microcode is still around?
Ben.
