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

From Computer History Wiki
Jump to navigationJump to search
← Older editNewer edit →
m typo
m New cat
Line 10: Line 10:


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.
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==


* [[Digital Ethernet UNIBUS Network Adapter|DEUNA]], the DELUA's predecessor
* [[Digital Ethernet UNIBUS Network Adapter|DEUNA]], the DELUA's predecessor
{{semi-stub}}


==Further reading==
==Further reading==
Line 28: Line 28:


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

Revision as of 21:34, 17 August 2022

M7521

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:

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

Retrieved from "https://gunkies.org/w/index.php?title=Digital_Ethernet_Large-scale-integration_UNIBUS_Adapter&oldid=27415"