Difference between revisions of "MSV11-B MOS memory"
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Revision as of 22:28, 2 August 2022
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 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
- 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)
- MSV11-B Field Maintenance Print Set (MP00067)
- M7944 MSV11-B 4-Kword RAM - board images
