Difference between revisions of "QBUS ROMs"
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| − | [[Digital Equipment Corporation|DEC]] produced several generations of '''[[QBUS]] [[Read-only memory|ROM]] | + | [[Digital Equipment Corporation|DEC]] produced several generations of '''[[QBUS]] [[Read-only memory|ROM]]''' cards, initially specialized to a [[bootstrap]]ping use. Those early ones also included QBUS [[terminator]]s; some of the later were multi-function cards, and included other functionality. |
* The first was the [[REV11 DMA Refresh/Bootstrap/Terminator]] [[DEC card form factor|dual]] card. <!-- ; it contains 128 words, using 2 [[PROM]] chips. --> | * The first was the [[REV11 DMA Refresh/Bootstrap/Terminator]] [[DEC card form factor|dual]] card. <!-- ; it contains 128 words, using 2 [[PROM]] chips. --> | ||
* The second was the [[BDV11 Bus Terminator/ROM]], a [[DEC card form factor|quad]] card. | * The second was the [[BDV11 Bus Terminator/ROM]], a [[DEC card form factor|quad]] card. | ||
| + | |||
| + | A number of ROM memory cards were also available: | ||
| + | |||
| + | * [[MRV11-A Read-Only Memory Module]] (also known as the 'MRV11) | ||
| + | * [[MRV11-B UV PROM-RAM Memory Module]] | ||
* [[MRV11-C Read-Only Memory Module]] | * [[MRV11-C Read-Only Memory Module]] | ||
* [[MRV11-D Universal Programmable Read-Only Memory]] | * [[MRV11-D Universal Programmable Read-Only Memory]] | ||
Revision as of 15:10, 4 July 2023
DEC produced several generations of QBUS ROM cards, initially specialized to a bootstrapping use. Those early ones also included QBUS terminators; some of the later were multi-function cards, and included other functionality.
- The first was the REV11 DMA Refresh/Bootstrap/Terminator dual card.
- The second was the BDV11 Bus Terminator/ROM, a quad card.
A number of ROM memory cards were also available:
- MRV11-A Read-Only Memory Module (also known as the 'MRV11)
- MRV11-B UV PROM-RAM Memory Module
- MRV11-C Read-Only Memory Module
- MRV11-D Universal Programmable Read-Only Memory
Multi-function cards which included ROMs included:
