MS750 Memory System: Difference between revisions
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The MS750 Memory System consists of: | The '''MS750 Memory System''' is the [[main memory]] for the [[VAX-11/750]]; it consists of: | ||
* one Memory Controller (MCM) | * one Memory Controller (MCM) | ||
* one to eight Memory Modules | * one to eight Memory Modules | ||
| Line 5: | Line 6: | ||
The Memory Controller is a [[CMI]] Module, either L0011, L0016, or L0022 placed in CMI Slot 10. | The Memory Controller is a [[CMI]] Module, either L0011, L0016, or L0022 placed in CMI Slot 10. | ||
The Memory Modules have their own backplane with 8 slots. | The Memory Modules have their own [[backplane]] slots (the physical backplane itself, [[DEC part number]] 50-13821/70-16486, is shared with the [[CPU]]), 8 slots in total. | ||
==VAX-11/750 Memory Controllers== | ==VAX-11/750 Memory Controllers== | ||
There were three different Memory Controller Modules for the MS750: | |||
* | |||
- | * L0011 - up to eight [[M8728]] 256K Memory Modules = 2M max. | ||
* L0016 - up to eight [[M8750]] 1M Memory Modules = 8M max. | |||
* L0022 - up to two [[M7199]] 4M Memory Modules and six [[M8750]] 1M Memory Modules = 14M max. | |||
- | |||
(14M of Memory are the architectural limit of the VAX-11/750) | |||
The earlier modules are also used with the [[MK11 memory system]] of the [[PDP-11/70]]. | |||
14M of Memory are the architectural limit of the VAX-11/750. | |||
==External links== | |||
* [http://www.bitsavers.org/pdf/dec/vax/750/EK-MS750-TD-001_VAX-11_750_Memory_System_Technical_Description_198009.pdf VAX-11/750 Memory System Technical Description] (EK-MS750-TD-001) | |||
* [http://www.bitsavers.org/pdf/dec/vax/750/MP01404_750_Engineering_Drawings_Memory_Controller_198206.pdf Comet Memory Unit Field Maintenance Print Set] (MP01404) - covers the L0016 | |||
[[Category: VAXen]] | |||
[[Category: DEC Memories]] | |||
Revision as of 12:05, 2 June 2022
The MS750 Memory System is the main memory for the VAX-11/750; it consists of:
- one Memory Controller (MCM)
- one to eight Memory Modules
The Memory Controller is a CMI Module, either L0011, L0016, or L0022 placed in CMI Slot 10.
The Memory Modules have their own backplane slots (the physical backplane itself, DEC part number 50-13821/70-16486, is shared with the CPU), 8 slots in total.
VAX-11/750 Memory Controllers
There were three different Memory Controller Modules for the MS750:
- L0011 - up to eight M8728 256K Memory Modules = 2M max.
- L0016 - up to eight M8750 1M Memory Modules = 8M max.
- L0022 - up to two M7199 4M Memory Modules and six M8750 1M Memory Modules = 14M max.
(14M of Memory are the architectural limit of the VAX-11/750)
The earlier modules are also used with the MK11 memory system of the PDP-11/70.
External links
- VAX-11/750 Memory System Technical Description (EK-MS750-TD-001)
- Comet Memory Unit Field Maintenance Print Set (MP01404) - covers the L0016
