> On Oct 24, 2025, at 6:14 PM, ben via cctalk <[email protected]> wrote:
>
> 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.
> -----
> 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.
I don't know about PDP-8 support. The 11/60 with PDP-8 microcode I know of was
used by the WPS-8 development group when it was in Merrimack, NH, next door to
the Typeset-11 group where I started in 1978.
> Rumour has it that some hacker also did this on a VAX-11/780, which would
> definitely out-run the 11/60 version.
I don't know about that rumor, and depending on the micromachine architecture
it might not outrun the 11/60 version.
> I wonder if the custom microcode is still around?
I asked its author and was told "unfortunately not".
paul
