Help: PDP-11 instruction classification (again!)
bqt at Update.UU.SE
Thu May 11 15:56:02 AEST 2000
On Wed, 10 May 2000, Tim Shoppa wrote:
> >J11 = KDJ-11A or KDJ-11B
> And lots of other systems. Some DEC peripherals (most noticably the
> early HSC storage controllers for VAXclusters) have J11's, several Xerox
> laserprinters used J11's, DEC PRO380's used J11's. Many third-party
> CPU boards use J11's, it's not unusual to see them scrounging the used
> market for HSC's to strip the J11 from, as the HSC's generally had late-rev
> J11's. (And Harris hasn't made the J11 chips for many years now.)
Actually, the first HSCs (HSC-50 and HSC-70) have an F11. Hmmm, a bit
unsure about the HSC-70 come to think of it. The HSC-50 is definitely F-11
anyway, and that's the oldest one. Boots of DECtape II. Slow as hell
because of it. :-)
> You can find T11 chips in several Q-bus and Unibus peripherals, most notably
> the RQDX1, 2, and 3 (the chip labeled "27-17311-01").
What cpu is in the DEUNA and DEQNA? I think those also have a T11.
> The CPU chipset used in the LSI-11/02 and /03 is a Western Digital chipset,
> and the same set was used (with different microcode) by other CPU makers.
> In particular, the Alpha Micro two-board S-100 set.
And I think DEC even supported the possibility of writing your own
microcode for this one.
Johnny Billquist || "I'm on a bus
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email: bqt at update.uu.se || Reading murder books
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