Difference between revisions of "MRV11-A Read-Only Memory Module"
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The '''MRV11-A Read-Only Memory Module''' (also known as the '''MRV11''') was the first [[QBUS]] [[Read-only memory|ROM]] card. It held up to 32 4-bit-wide [[PROM]] [[integrated circuit|chips]], either 256x4 or 512x4; it thus held up to 8KB when fully populated with 512x4 chips. The MRV11-A was a [[DEC card form factor|dual]]-height card, the '''M7942'''. | The '''MRV11-A Read-Only Memory Module''' (also known as the '''MRV11''') was the first [[QBUS]] [[Read-only memory|ROM]] card. It held up to 32 4-bit-wide [[PROM]] [[integrated circuit|chips]], either 256x4 or 512x4; it thus held up to 8KB when fully populated with 512x4 chips. The MRV11-A was a [[DEC card form factor|dual]]-height card, the '''M7942'''. | ||
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==See also== | ==See also== | ||
Latest revision as of 20:18, 27 December 2023
The MRV11-A Read-Only Memory Module (also known as the MRV11) was the first QBUS ROM card. It held up to 32 4-bit-wide PROM chips, either 256x4 or 512x4; it thus held up to 8KB when fully populated with 512x4 chips. The MRV11-A was a dual-height card, the M7942.
See also
- MRV11-B UV PROM-RAM Memory Module
- MRV11-C Read-Only Memory Module
- MRV11-D Universal Programmable Read-Only Memory
External links
- microcomputer processor handbook - the MRV11-A is covered on pp. 395-405 of the PDF
- LSI-11, PDP-11/03 user's manual (EK-LSI11-TM-002) - the MRV11-A is covered in Section 4.4 (pp. 62-65 of the PDF), Chapter 9 (pp. 113-117 of the PDF)
- MRV11-A Field Maintenance Print Set (MP00066)
