Difference between revisions of "KD11-Z CPU"
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| − | The '''KD11-Z CPU''' was the [[Central Processing Unit|CPU]] of the [[PDP-11/44]]; the letter code 'Z' was a tip to the fact that it was the last | + | The '''KD11-Z CPU''' was the [[Central Processing Unit|CPU]] of the [[PDP-11/44]]; the terminal letter code 'Z' was a tip to the fact that it was the last [[PDP-11]] CPU to be made out of discrete [[integrated circuit|chips]], and not a [[microprocessor]], and also nearly the last native [[UNIBUS]] CPU (except for the [[KDF11-U CPU|KDF11-U]]). |
The KD11-Z used the [[Extended UNIBUS]] for its [[bus]] to [[main memory]], allowing it to have up to 4 mega-[[byte]]s of main memory. All devices were attached to a semi-separate [[UNIBUS]] (it and the EUB shared data lines, but not address lines); [[Direct Memory Access|DMA]] devices could gain access to the memory via a [[UNIBUS map]] which connected the two, and mapped UNIBUS addresses to main memory addresses. | The KD11-Z used the [[Extended UNIBUS]] for its [[bus]] to [[main memory]], allowing it to have up to 4 mega-[[byte]]s of main memory. All devices were attached to a semi-separate [[UNIBUS]] (it and the EUB shared data lines, but not address lines); [[Direct Memory Access|DMA]] devices could gain access to the memory via a [[UNIBUS map]] which connected the two, and mapped UNIBUS addresses to main memory addresses. | ||
| − | Full [[PDP-11 Memory Management]] and a [[cache]] (the [[KK11- | + | Full [[PDP-11 Memory Management]] and a [[cache]] (the [[KK11-B Cache Memory|KK11-B]]) were standard on all KD11-Z's. It also supported the optional [[FP11-F Floating-Point Processor|FP11-F]] [[floating point]] (full [[FP11 floating point]]) and/or the [[KE44-A Commercial Instruction Set Processor]]; these plugged into dedicated slots in the CPU [[backplane]] (it could work with either, or both). |
==Hardware Details== | ==Hardware Details== | ||
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In addition, a single dual board, the M7090 Console Interface module, held a number of [[Berg connector]] headers used for various [[input/output]] functions. | In addition, a single dual board, the M7090 Console Interface module, held a number of [[Berg connector]] headers used for various [[input/output]] functions. | ||
| − | These were placed in a 14-slot CPU-specific [[backplane]], along with the optional FP11-F and KE44-A, and all the main memory cards (the EUB was only present on the main backplane | + | These were placed in a 14-slot CPU-specific [[backplane]] ([[DEC part number]] 70-16502 for the complete assembly, 54-13593/50-13592 for the [[printed circuit board|PCB]]), along with the optional FP11-F and KE44-A, and all the main memory cards (M8722 [[MS11-M MOS memory|MS11-M]], or later the M8743 [[MS11-P MOS memory|MS11-P]]); the EUB was only present on the main backplane. That left two slots, one [[Modified UNIBUS Device|MUD/SPC]] slot, and one [[Small Peripheral Controller|SPC]] slot, which also contained the 'UNIBUS out'. |
Board locations are: | Board locations are: | ||
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| 8 || colspan="6" style="text-align:center;" | M7098 UNIBUS interface | | 8 || colspan="6" style="text-align:center;" | M7098 UNIBUS interface | ||
|- | |- | ||
| − | | 9 || colspan="6" style="text-align:center;" | | + | | 9 || colspan="6" style="text-align:center;" | main memory |
|- | |- | ||
| − | | 10 || colspan="6" style="text-align:center;" | | + | | 10 || colspan="6" style="text-align:center;" | main memory (optional) |
|- | |- | ||
| − | | 11 || colspan="6" style="text-align:center;" | | + | | 11 || colspan="6" style="text-align:center;" | main memory (optional) |
|- | |- | ||
| − | | 12 || colspan="6" style="text-align:center;" | | + | | 12 || colspan="6" style="text-align:center;" | main memory (optional) |
|- | |- | ||
| 13 || colspan="6" style="text-align:center;" | MUD/SPC | | 13 || colspan="6" style="text-align:center;" | MUD/SPC | ||
| Line 55: | Line 55: | ||
| 14 || colspan="2" style="text-align:center;" | UNIBUS Out || colspan="4" style="text-align:center;" | SPC | | 14 || colspan="2" style="text-align:center;" | UNIBUS Out || colspan="4" style="text-align:center;" | SPC | ||
|} | |} | ||
| + | |||
| + | [[Image:1144Power.jpg|300px|thumb|right|PDP-11/44 power cabling setup]] | ||
The details of how the EUB and UNIBUS interoperated are not yet clear (it is not covered in [[Digital Equipment Corporation|DEC]]'s documentation); it was almost certainly similar to that used in the [[PDP-11/24#Implementation details|-11/24]]. | The details of how the EUB and UNIBUS interoperated are not yet clear (it is not covered in [[Digital Equipment Corporation|DEC]]'s documentation); it was almost certainly similar to that used in the [[PDP-11/24#Implementation details|-11/24]]. | ||
| − | [[ | + | The standard [[mounting box]] for the CPU was the [[BA11-A mounting box|BA11-A]], which is unusual in that it does not use only the standard [[DEC power distribution connectors]]; it provided special connections on a[[bus bar]]s in its power supply, and the KD11-Z backplane uses unique [[Flexprint cable]]s for power, which go to the special connections (see image). |
| − | + | ==External links== | |
| − | + | * [http://bitsavers.org/pdf/dec/pdp11/1144/MP00897_11X44sys_Dec79.pdf 11X44 Field Maintenance Print Set] - the KD11-Z Field Maintenance Print Set (MP00812) is on pp. 10-105 | |
| + | * [http://bitsavers.org/pdf/dec/pdp11/1144/1144_SystemTechMan.pdf PDP-11/44 System Technical Manual] - the KD11-Z is covered in Chapters 2 and 6 | ||
| − | [[Category: UNIBUS Processors]] | + | [[Category: PDP-11 UNIBUS Processors]] |
| − | [[Category: | + | [[Category: Extended UNIBUS]] |
Latest revision as of 14:59, 6 February 2024
The KD11-Z CPU was the CPU of the PDP-11/44; the terminal letter code 'Z' was a tip to the fact that it was the last PDP-11 CPU to be made out of discrete chips, and not a microprocessor, and also nearly the last native UNIBUS CPU (except for the KDF11-U).
The KD11-Z used the Extended UNIBUS for its bus to main memory, allowing it to have up to 4 mega-bytes of main memory. All devices were attached to a semi-separate UNIBUS (it and the EUB shared data lines, but not address lines); DMA devices could gain access to the memory via a UNIBUS map which connected the two, and mapped UNIBUS addresses to main memory addresses.
Full PDP-11 Memory Management and a cache (the KK11-B) were standard on all KD11-Z's. It also supported the optional FP11-F floating point (full FP11 floating point) and/or the KE44-A Commercial Instruction Set Processor; these plugged into dedicated slots in the CPU backplane (it could work with either, or both).
Hardware Details
The basic KD11-Z CPU consisted of five hex boards:
- M7094 Data Path module
- M7095 Control module
- M7096 Multifunction module
- M7097 KK11-B Cache module
- M7098 UNIBUS interface module
In addition, a single dual board, the M7090 Console Interface module, held a number of Berg connector headers used for various input/output functions.
These were placed in a 14-slot CPU-specific backplane (DEC part number 70-16502 for the complete assembly, 54-13593/50-13592 for the PCB), along with the optional FP11-F and KE44-A, and all the main memory cards (M8722 MS11-M, or later the M8743 MS11-P); the EUB was only present on the main backplane. That left two slots, one MUD/SPC slot, and one SPC slot, which also contained the 'UNIBUS out'.
Board locations are:
| Connector | ||||||
|---|---|---|---|---|---|---|
| Slot | A | B | C | D | E | F |
| 1 | M7090 CIM | M7091 CIS | ||||
| 2 | M7092 CIS | |||||
| 3 | M7093 Floating point | |||||
| 4 | M7094 Data paths | |||||
| 5 | M7095 Control | |||||
| 6 | M7096 MFM | |||||
| 7 | M7097 Cache | |||||
| 8 | M7098 UNIBUS interface | |||||
| 9 | main memory | |||||
| 10 | main memory (optional) | |||||
| 11 | main memory (optional) | |||||
| 12 | main memory (optional) | |||||
| 13 | MUD/SPC | |||||
| 14 | UNIBUS Out | SPC | ||||
The details of how the EUB and UNIBUS interoperated are not yet clear (it is not covered in DEC's documentation); it was almost certainly similar to that used in the -11/24.
The standard mounting box for the CPU was the BA11-A, which is unusual in that it does not use only the standard DEC power distribution connectors; it provided special connections on abus bars in its power supply, and the KD11-Z backplane uses unique Flexprint cables for power, which go to the special connections (see image).
External links
- 11X44 Field Maintenance Print Set - the KD11-Z Field Maintenance Print Set (MP00812) is on pp. 10-105
- PDP-11/44 System Technical Manual - the KD11-Z is covered in Chapters 2 and 6
