Difference between revisions of "MS750 Memory System"
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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 13:05, 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
