Difference between revisions of "LSI-11"
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The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] processor, using the [[QBUS]]. Several different LSI-11 models exist, including the KDF11-F (quad form factor), and the KD11-HA (dual form factor), also called the '''LSI-11/2'''. | The '''LSI-11''' was DEC's first cost-reduced [[PDP-11]] processor, using the [[QBUS]]. Several different LSI-11 models exist, including the KDF11-F (quad form factor), and the KD11-HA (dual form factor), also called the '''LSI-11/2'''. | ||
| − | However, they all use the same chip set internally, the Western Digital WD16/CP1600 (alternative designations). The chip set consists of a data path chip, a control chip, and two or three [[microcode]] ROMs (each holding 512 words which are 22 bits wide). The third uROM is optional, and is the KEV11, for the EIS/FIS instructions. | + | However, they all use the same chip set internally, the Western Digital WD16/CP1600 (alternative designations). The chip set consists of a data path chip, a control chip, and two or three [[microcode]] ROMs (each holding 512 words which are 22 bits wide). |
| + | |||
| + | The third uROM is optional, and a number of different choices are available. One is the KEV11-A, for the EIS/FIS instructions; the KEV11-B provides EIS without FIS. The KEV11-C provides a subset of the PDP-11 [[PDP-11 Commercial Instruction Set|CIS]], sometimes known as DIS ([[DIBOL]] instruction set). | ||
==LSI-11== | ==LSI-11== | ||
| − | The LSI-11 is a quad board (M7264) with additional functionality on-board (making possible a single-board computer): the base KD11-F version includes 4KW of MOS RAM; the KD11-H version has the RAM deleted; the KD11-Q includes | + | The LSI-11 is a quad board (M7264) with additional functionality on-board (making possible a single-board computer): the base KD11-F version includes 4KW of MOS RAM; the KD11-H version has the RAM deleted; the KD11-Q includes the KEV11-C. The chip order (from the left, with the contact finger edge down, and the component side facing the viewer) is KEV11, uROM 1, uROM 0, Control, Data Path. |
==LSI-11/2== | ==LSI-11/2== | ||
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There are a number of variants of all the various uROM chips; it is not known if all variants are completely interoperable (i.e. any revision of any chip can be replaced with any other, and have the machine still work), so combinations will be listed. | There are a number of variants of all the various uROM chips; it is not known if all variants are completely interoperable (i.e. any revision of any chip can be replaced with any other, and have the machine still work), so combinations will be listed. | ||
| − | For the KEV11-A | + | For the KEV11-A, one version is a 3015 23-003B5, which is |
suitable for the M7270 quad card etch revisions E and F, and the M7264 dual card. Another version is reported to be the 23-091A5, suitable for the M7270 quad card, etch revisions C and D. | suitable for the M7270 quad card etch revisions E and F, and the M7264 dual card. Another version is reported to be the 23-091A5, suitable for the M7270 quad card, etch revisions C and D. | ||
| − | + | For the KEV11-B, one version is known, the 23-090A5; it is suitable for the M7270 quad module etch revisions C and D. | |
| − | module etch revisions C and D | ||
| − | The KEV11-C | + | The KEV11-C uses two uROMs, the 23-004B5 and 23-005B5. (There may also be a hybrid - i.e. single DIP carrier - version of the KEV11-C, but the part number is unknown.) |
==Links== | ==Links== | ||
Revision as of 15:07, 5 January 2016
The LSI-11 was DEC's first cost-reduced PDP-11 processor, using the QBUS. Several different LSI-11 models exist, including the KDF11-F (quad form factor), and the KD11-HA (dual form factor), also called the LSI-11/2.
However, they all use the same chip set internally, the Western Digital WD16/CP1600 (alternative designations). The chip set consists of a data path chip, a control chip, and two or three microcode ROMs (each holding 512 words which are 22 bits wide).
The third uROM is optional, and a number of different choices are available. One is the KEV11-A, for the EIS/FIS instructions; the KEV11-B provides EIS without FIS. The KEV11-C provides a subset of the PDP-11 CIS, sometimes known as DIS (DIBOL instruction set).
Contents
LSI-11
The LSI-11 is a quad board (M7264) with additional functionality on-board (making possible a single-board computer): the base KD11-F version includes 4KW of MOS RAM; the KD11-H version has the RAM deleted; the KD11-Q includes the KEV11-C. The chip order (from the left, with the contact finger edge down, and the component side facing the viewer) is KEV11, uROM 1, uROM 0, Control, Data Path.
LSI-11/2
The LSI-11 is a dual board (M7270); it contains the processor, and nothing else.
Note that the image in the "Microcomputer Products Handbook" (pg. C-18) is erroneous; the order of the chips (from the handle end) is, in fact, KEV11, Control, uROM 1, uROM 0, Data Path (per the KD11-HA print set); the order given in the handbook is that for the LSI-11 (no doubt an image was re-used without checking).
Chip variants
There are a number of variants of all the various uROM chips; it is not known if all variants are completely interoperable (i.e. any revision of any chip can be replaced with any other, and have the machine still work), so combinations will be listed.
For the KEV11-A, one version is a 3015 23-003B5, which is suitable for the M7270 quad card etch revisions E and F, and the M7264 dual card. Another version is reported to be the 23-091A5, suitable for the M7270 quad card, etch revisions C and D.
For the KEV11-B, one version is known, the 23-090A5; it is suitable for the M7270 quad module etch revisions C and D.
The KEV11-C uses two uROMs, the 23-004B5 and 23-005B5. (There may also be a hybrid - i.e. single DIP carrier - version of the KEV11-C, but the part number is unknown.)
Links
| v • d • e PDP-11 Computers and Peripherals |
|---|
| UNIBUS PDP-11s - PDP-11/20 • PDP-11/15 • PDP-11/35 • PDP-11/40 • PDP-11/45 • PDP-11/50 • PDP-11/55 • PDP-11/70 PDP-11/05 • PDP-11/10 • PDP-11/04 • PDP-11/34 • PDP-11/60 • PDP-11/44 • PDP-11/24 • PDP-11/84 • PDP-11/94 QBUS PDP-11s - PDP-11/03 • PDP-11/23 • PDP-11/23+ • MicroPDP-11/73 • MicroPDP-11/53 • MicroPDP-11/83 • MicroPDP-11/93 QBUS CPUs: LSI-11 • LSI-11/2 • KDF11-A • KDF11-B • KDJ11-A • KDJ11-B • KDJ11-D • KDJ11-E Buses: UNIBUS • UNIBUS map • SPC • MUD • EUB • QBUS • CD interconnect • PMI Also: PDP-11 architecture • PDP-11 Extended Instruction Set • FP11 floating point • PDP-11 Memory Management |
| UNIBUS CPUs: KA11 • KC11 • KB11-A • KB11-B • KB11-C • KB11-D • KD11-A • KD11-B • KD11-D • KD11-E • KD11-EA • KD11-K • KD11-Z • KDF11-U
Co-processors: FP11-A • FP11-B • FP11-C • FP11-E • FP11-F • KE44-A • FPF11 Chips: LSI-11 • KEV11-A • KEV11-B • KEV11-C • F-11 • KEF11-A • KTF11-A • T-11 • J-11 • FPJ11 CPU options: KE11-E • KE11-F • KJ11-A • KT11-C • KT11-D • KK11-A • KK11-B • KT24 • KTJ11-B Rare CPU options: KS11 Memory Protection and Relocation option • KT11-B Paging Option • KUV11 Writeable Control Store Front panels: KY11-A • KY11-D • KY11-J • KY11-LA • KY11-LB • KY11-P More on buses: UNIBUS and QBUS termination • Bus Arbitration on the Unibus and QBUS • CTI BUS PDT-11s - PDT-11/110 • PDT-11/130 • PDT-11/150 CTI PDP-11s - PRO-325 • PRO-350 • PRO-380 Other: FIS floating point • PDP-11 Commercial Instruction Set • PDP-11 stacks • PDP-11 family differences |
