Digital Ethernet Large-scale-integration UNIBUS Adapter
From Computer History Wiki
The Digital Ethernet Large-scale-integration UNIBUS Adapter (short, and usual, name DELUA) was DEC's second UNIBUS to Ethernet network interface. It consisted of one hex board, the M7521.
A number of complex chips are used:
- Motorola MC68000 microprocessor
- LANCE Ethernet chip
- DEC part number 21-22703-02 (function currently unknown)
The DELUA has 128KB of DRAM (using 64Kx1 DRAM chips), probably with parity, used for both buffers, and also to hold the microprocessor's code; there is also 16KB of ROM containing its firmware, which is copied to DRAM on startup, as the latter is faster.
See also
- DEUNA, the DELUA's predecessor
Further reading
- DELUA Technical Description (EK-DELUA-TD)
- DELUA Field Maintenance Print Set (MP-01787)
External links
- DELUA User's Guide (EK-DELUA-UG-002)
- DELUA - firmware
