Difference between revisions of "Digital Ethernet Large-scale-integration UNIBUS Adapter"

From Computer History Wiki
Jump to: navigation, search
m (rm dup cat)
m (typo)
(4 intermediate revisions by the same user not shown)
Line 1: Line 1:
 
[[Image:m7521.jpg|thumb|right|250px|M7521]]
 
[[Image:m7521.jpg|thumb|right|250px|M7521]]
  
The '''DELUA''' was [[DEC]]'s second [[UNIBUS]] to [[Ethernet]] [[network interface]]. It consisted of one [[DEC card form factor|hex]] board, the 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 [[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==
  
* [[DEUNA]], the DELUA's predecessor
+
* [[Digital Ethernet UNIBUS Network Adapter|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: DEC Boards]]
 
 
[[Category: UNIBUS Network Interfaces]]
 
[[Category: UNIBUS Network Interfaces]]

Revision as of 02:22, 5 November 2021

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