Digital Ethernet Large-scale-integration UNIBUS Adapter: Difference between revisions

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The '''DELUA''' was [[DEC]]'s second [[UNIBUS]] to [[Ethernet]] [[network interface]]. It consisted of one [[DEC card form factor|hex]] board, the M7521.
The '''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:
* [[Motorola MC68000]] [[microprocessor]]
* [[LANCE]] Ethernet chip
* [[DEC part number]] 21-22703-02 (function currently unknown)
The DELUA has 128KB of [[Dynamic RAM|DRAM]] (using 64Kx1 DRAM chips), probably with [[parity]], used for both [[buffer]]s, and also to hold the microprocessor's [[object code|code]]; there is also 16KB of [[ROM]] containing its [[firmware]], which is copied to DRAM on startup, as the latter is faster.
{{semi-stub}}


==See also==
==See also==
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* [[DEUNA]], the DELUA's predecessor
* [[DEUNA]], the DELUA's predecessor


{{semi-stub}}
==Further reading==
 
* ''DELUA Technical Description'' (EK-DELUA-TD)
* ''DELUA Field Maintenance Print Set'' (MP-01787)
 
==External links==
 
* [http://www.bitsavers.org/pdf/dec/unibus/EK-DELUA-UG-002.pdf DELUA User's Guide] (EK-DELUA-UG-002)
* [http://www.bitsavers.org/pdf/dec/unibus/firmware/DELUA/ DELUA] - firmware


[[Category: UNIBUS Network Interfaces]]
[[Category: UNIBUS Network Interfaces]]

Revision as of 00:38, 5 November 2021

M7521

The 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:

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

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