Joe's web site now has a
more up-to-date table.
-- Eric Smith (no relation)
From: jms@tardis.Tymnet.COM (Joe Smith) Newsgroups: alt.folklore.computers Subject: PDP-10: how many different models? Message-ID: <1828@tardis.Tymnet.COM> Date: 12 May 91 08:35:52 GMT Reply-To: jms@tardis.Tymnet.COM (Joe Smith) Organization: BT Tymnet, San Jose, CA Summary: a bunch
I ran across an old file of mine that listed the various modles of PDP-10 that DEC sold. It's incomplete, as it was written 8 years ago, before the 1095 and 2065 became reality. And it does not include 3rd-party compatibles, such as the Systems Concepts SC30M, SC40M, and Foonly F3 and F4. It's missing the non-DEC pagers as well.
I'd like to collect the missing data, then try to reformat this file so that it fits in 80 columns again (it is 132 cols wide now).
PDP-10 Features | 1050 | 1070 | 1080 | 1090PA | 1090PV | 1091 | 2020 | 2040PA | 2040PV | 2050PA | 2050PV | 2060 | "C" | "R" |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CPU type | KA | KI | KL-A | KL-B | KL-D | KL-D | KS | KL-B | KL-D | KL-B | KL-D | KL-E | KL-? | KL-E |
Model-B backplane ucode | -- | -- | No | No | Yes | Yes | -- | No | Yes | No | Yes | Yes | Better | Yes |
Clock speed nanoseconds | async | async | 40 | 40 | 33 | 33 | 50 | 40 | 33 | 40 | 33 | 33 | 33 | 33 |
Extended Sections | No page | None | None | None | 32 | 32 | 1 | None | 32 | None | 32 | 32 | 32 | 32 |
G-floating | No DF | No | No | No | Yes | Yes | ? | No | Yes | No | Yes | Yes | Yes | Yes |
RH20 internal channels | No | No | No | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | CI |
Size of Cache | -- | -- | 2048 | 2048 | 2048 | 2048 | 512 | 0 | 0 | 2048 | 2048 | 2048 | 4096 | 2048 |
I/O bus or Unibus | I/O | I/O | I/O | I/O | I/O | I/O | Uni | No IOB | No IOB | No IOB | No IOB | Option | Option | NI |
Internal memory | No | No | No | No | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Size of cabinets | Tall | Tall | Tall | Tall | Tall | Tall | Short | Short | Short | Short | Short | Short | Short | Jupiter |
Console Front-End | None | None | 11/40 | 11/40 | 11/40 | 11/40 | 8080 | 11/40 | 11/40 | 11/40 | 11/40 | 11/40 | 11/40 | 11/40 |
Bootstrap Device | -- | -- | DECtape | DECtape | DECtape | DECtape | Magtape | Floppy | Floppy | Floppy | Floppy | Floppy | Floppy | Floppy |
Runs TOPS-10 7.01 | No | Yes | Yes | Yes | Yes | Yes | Yes | No | No | No | No | Maybe | Maybe | No |
Runs TOPS-10 7.02 | No | No | No | No | Yes | Yes | Yes | No | No | No | No | Maybe | Maybe | No |
Runs TOPS-10 7.03 | No | No | No | No | Yes | Yes | Yes | No | No | No | No | Maybe | Yes | Yes |
Runs TOPS-20 rel 4 | No | No | No | No | No | Maybe | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No |
Runs TOPS-20 rel 5 | No | No | No | No | No | Maybe | No | Yes | Yes | Yes | Yes | Yes | Yes | No |
Runs TOPS-20 rel 6 | No | No | No | No | No | Maybe | No | No | No | No | No | Yes | Yes | Yes |
The "Model-A backplane" has 1280 words of 96 bit microcode. "Model-B backplane" is 2048 words of microcode. The "Model-C" machine will be a KL10-E with only 2048 words of microcode, but will have 4096 words cache and double pager buffer (1024 instead of 512). The "Model-R" machine is the "FCC-KL", a KL10-E in "Jupiter" cabinets with space enough for CI (HSC/RA81) and NI (Ethernet).
A 2040 is a 2050 without cache, a 2060 is a 2050-PV with MOS memory. A 2060 with an I/O bus is identical to a 1091 painted orange. A 1090 is a 1080 with internal channels. 1090, 2040, and 2050 come with either Model-A or Model-B backplanes. Extended addressing and G-floating both require a Model-B backplane for the microcode (the 2020 uses extended addressing but is limited to a single section). The 1090T was created for ARPANET, it is a blue PDP-20 (floppies instead of DECtapes). 7.02 and Rel 6 require extended addressing. The KA has no paging hardware, therefore it cannot run 7-series monitors or TOPS-20.
1080 | KL10-A(PA) running TOPS-10 |
1088 | Dual processor (1080) system |
1090 | KL10-B(PA) or KL10-D(PV) running TOPS-10 |
1090T | KL10-BC(PA) running TOPS-20 (ARPANET systems only, 1090 with floppies) |
1091 | KL10-E(PV) with cache and DIB20 I/O bus adapter running TOPS-10 |
1092 | KL10-E(PV) with cache and MOS memory running TOPS-10 (there is no longer any distinction between 1091 and 1092) |
1099 | Dual processor (1090) system |
2040 | KL10-C(PA) or KL10-E(PV) without cache running TOPS-20 |
2050 | KL10-C(PA) or KL10-E(PV) with cache running TOPS-20 |
2060 | KL10-E(PV) with MOS memory and cache running TOPS-20 |
Designation | PV | Boot | Cache | DTEs | RH20s | IO bus | Used in |
---|---|---|---|---|---|---|---|
KL10-A | No | DECtape | Yes | 1 | 0 | Yes | 1080 (no internal channels, uses RH10) |
KL10-B | No | DECtape | Yes | 4 | 8 | Yes | 1090 Model-A |
KL10-BC | No | Floppy | Yes | 4 | 8 | Yes | 1090T (ARPANET) |
KL10-C | No | Floppy | Option | 4 | 8 | No | 2040 Model-A, 2050 Model-A |
KL10-D | Yes | DECtape | Yes | 4 | 8 | Yes | 1090 Model-B |
KL10-E | Yes | Floppy | Option | 4 | 8 | Option | 1091, 2050 Model-B, 2060 Model-B |
KL10-fast | Yes | Floppy | Bigger | 4 | 8 | Option | "Model-C" |
KL10-FCC | Yes | Floppy | Yes | 4 | ? | CI/NI | "Model-R" |
-- Joe Smith (408)922-6220 | SMTP: jms@tardis.tymnet.com or jms@gemini.tymnet.com BT Tymnet Tech Services | UUCP: ...!{ames,pyramid}!oliveb!tymix!tardis!jms PO Box 49019, MS-C51 | BIX: smithjoe | CA license plate: "POPJ P," (PDP-10) San Jose, CA 95161-9019 | humorous dislaimer: "My Amiga 3000 speaks for me."
The 1095 and 2065 are apparently the 1091 and 2060 with the cache (and paging?) upgraded to an MCA25.
The KL10 main CPU logic with the old (MCA20) cache is called a KL10-PV. With the MCA25 it is a KL10-PW.
The KL10-PV prints list the following variants:
Variant | Cache | Internal Channels |
---|---|---|
KL10-AA, -AB | yes | no |
KL10-BA, -BB, -BC, -BD | yes | yes |
KL10-CA, -CB | no | yes |
Last updated September 23, 1998
Copyright 1996, 1998 Eric Smith