Difference between revisions of "Digital Ethernet Large-scale-integration UNIBUS Adapter"
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[[Image:m7521.jpg|thumb|right|250px|M7521]] | [[Image:m7521.jpg|thumb|right|250px|M7521]] | ||
| − | The '''Digital Ethernet Large-scale | + | 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 [[DEC card form factor|hex]] board, the M7521. |
A number of complex [[integrated circuit|chips]] are used: | A number of complex [[integrated circuit|chips]] are used: | ||
Revision as of 02:22, 5 November 2021
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
