MRV11-A Read-Only Memory Module
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.
- MRV11-B UV PROM-RAM Memory Module
- MRV11-C Read-Only Memory Module
- MRV11-D Universal Programmable Read-Only Memory