Difference between revisions of "MSV11-B MOS memory"
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<!-- [[Image:M7944.jpg|150px|thumb|right|M7944 memory card]] --> | <!-- [[Image:M7944.jpg|150px|thumb|right|M7944 memory card]] --> | ||
| − | The '''MSV11-B''' (M7944) was a [[DEC card form factor|dual]]-height [[QBUS]] [[Dynamic RAM|DRAM]] [[main memory]] card. They held 8KB when fully populated with 4Kx1 DRAM [[integrated circuit|chips]]. They required external [[refresh]], typically performed by the [[LSI-11]] [[Central Processing Unit|CPU]]. | + | The '''MSV11-B''' (M7944) was a [[DEC card form factor|dual]]-height [[QBUS]] [[Dynamic RAM|DRAM]] [[main memory]] card. They held 8KB when fully populated with 4Kx1 DRAM [[integrated circuit|chips]]. They required external [[memory refresh]], typically performed by the [[LSI-11]] [[Central Processing Unit|CPU]]. |
They are [[QBUS#Variable address size|Q16]] cards (hence, could not be used in Q18 or Q22 systems, such as [[PDP-11/23]]'s with more than 64KB of memory). Their starting [[address]] is configured by use of [[jumper]]s. | They are [[QBUS#Variable address size|Q16]] cards (hence, could not be used in Q18 or Q22 systems, such as [[PDP-11/23]]'s with more than 64KB of memory). Their starting [[address]] is configured by use of [[jumper]]s. | ||
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==External links== | ==External links== | ||
| + | * [http://www.bitsavers.org/pdf/dec/pdp11/1103/EK-LSI11-TM-002.pdf LSI-11, PDP-11/03 user's manual] (EK-LSI11-TM-002) - the MSV11-B is covered in Section 4.5 (pp. 65-67 of the PDF) and Chapter 7 (pp. 107-109 of the PDF) | ||
* [http://bitsavers.org/pdf/dec/pdp11/handbooks/Microcomputer_Handbook_1976-1977.pdf Microcomputer Handbook (1976-77)] - the MSV11-B is covered on pp. 4-33—4-36 and 5-9—5-11 (pp. 116-119 and 162-164 of the PDF) | * [http://bitsavers.org/pdf/dec/pdp11/handbooks/Microcomputer_Handbook_1976-1977.pdf Microcomputer Handbook (1976-77)] - the MSV11-B is covered on pp. 4-33—4-36 and 5-9—5-11 (pp. 116-119 and 162-164 of the PDF) | ||
| − | + | * [http://www.bitsavers.org/pdf/dec/qbus/Digital_Microcomputer_Processor_Handbook_1979_80.pdf microcomputer processor handbook] - the MSV11-B is covered in Chapter 12, pp. 445-450 (pp. 455-460 of the PDF) | |
* [https://shop-pdp.net/~stuff/PDFs/DEC/MP00067_MSV11-B_Field_Maintenance_Print_Set_Mar76.pdf MSV11-B Field Maintenance Print Set] (MP00067) | * [https://shop-pdp.net/~stuff/PDFs/DEC/MP00067_MSV11-B_Field_Maintenance_Print_Set_Mar76.pdf MSV11-B Field Maintenance Print Set] (MP00067) | ||
* [https://shop-pdp.net/~stuff/Pictures/index.php?dslct=/DEC_M7944_4K-RAM&index=0&size=0&debug=0 M7944 MSV11-B 4-Kword RAM] - board images | * [https://shop-pdp.net/~stuff/Pictures/index.php?dslct=/DEC_M7944_4K-RAM&index=0&size=0&debug=0 M7944 MSV11-B 4-Kword RAM] - board images | ||
[[Category: QBUS Memories]] | [[Category: QBUS Memories]] | ||
Latest revision as of 20:32, 13 July 2023
The MSV11-B (M7944) was a dual-height QBUS DRAM main memory card. They held 8KB when fully populated with 4Kx1 DRAM chips. They required external memory refresh, typically performed by the LSI-11 CPU.
They are Q16 cards (hence, could not be used in Q18 or Q22 systems, such as PDP-11/23's with more than 64KB of memory). Their starting address is configured by use of jumpers.
External links
- LSI-11, PDP-11/03 user's manual (EK-LSI11-TM-002) - the MSV11-B is covered in Section 4.5 (pp. 65-67 of the PDF) and Chapter 7 (pp. 107-109 of the PDF)
- Microcomputer Handbook (1976-77) - the MSV11-B is covered on pp. 4-33—4-36 and 5-9—5-11 (pp. 116-119 and 162-164 of the PDF)
- microcomputer processor handbook - the MSV11-B is covered in Chapter 12, pp. 445-450 (pp. 455-460 of the PDF)
- MSV11-B Field Maintenance Print Set (MP00067)
- M7944 MSV11-B 4-Kword RAM - board images
