10 May
2000
10 May
'00
8:03 p.m.
53 (see J11) (KDJ-11D?)
Yes, the 11/53 is a KDJ11-D. And lots of other systems. Some DEC peripherals (most
noticably the
early HSC storage controllers for VAXclusters) have J11's, several Xerox
HSC was F11, J11 or T11??? I thought T11 or f11 in the early models.
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.)
T11 = ?
Never sold as a "PDP-11" system, though the chip does implement the
basic PDP-11 instruction set (and some of the add-ons.) It was sold
by DEC in the KXT11-CA single board computer, which had a T11, 32K RAM,
up to 32K of EPROM, 3 serial lines, some parallel I/O, and a Q-bus
interface. For more information see
From a functional view that would be like using a
LSI-11/2 card and it
runs the same stuff.
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").
Also used in VT240/241 terminals.
My collection have some marked DEC DC311/es (T-11 engineering samples).
I's a nice chip with a straightforward interface. Anyone that knows 8085,
nsc800 would like interfacing t-11. Instruction set is base LSI11.
Allison
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From: Tim Shoppa <SHOPPA(a)trailing-edge.com>
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Subject: Re: Help: PDP-11 instruction classification (again!)
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> Yes, the 11/53 is a KDJ11-D.
Not KDF-11B????
The KDF11-B (why are people putting the hyphens in all the wrong places?) is
the quad-height 11/23 with two SLU's and boot ROM.
Tim.