Difference between revisions of "DW780 Unibus Adapter"

From Computer History Wiki
Jump to: navigation, search
m (syntax)
m (External links: +VAX-11/780 Installation Manual, has section on DW780)
 
(4 intermediate revisions by the same user not shown)
Line 15: Line 15:
 
|} -->
 
|} -->
 
{{semi-stub}}
 
{{semi-stub}}
 +
 +
==See also==
 +
 +
* [[RH780 Massbus Adapter]]
  
 
==External links==
 
==External links==
Line 20: Line 24:
 
* [http://www.bitsavers.org/pdf/dec/vax/780/EK-DW780-TD-001_DW780_Unibus_Adapter_Technical_Description_197805.pdf DW780 Unibus Adapter Technical Description] (EK-DW780-TD-001)
 
* [http://www.bitsavers.org/pdf/dec/vax/780/EK-DW780-TD-001_DW780_Unibus_Adapter_Technical_Description_197805.pdf DW780 Unibus Adapter Technical Description] (EK-DW780-TD-001)
 
* [http://www.bitsavers.org/pdf/dec/vax/780/MP00497_DW780_Dec77.pdf DW780 Field Maintenance Print Set] (MP-00497)
 
* [http://www.bitsavers.org/pdf/dec/vax/780/MP00497_DW780_Dec77.pdf DW780 Field Maintenance Print Set] (MP-00497)
 +
* [https://archive.org/details/digital_mast_1_10_5 Modular Approach to Systems Test] - contains a section on the DW780 (on pp. 22-37 of the PDF); includes detailed installation instructions
 +
* [http://bitsavers.org/pdf/dec/vax/780/EK-SI780-IN-002_VAX-11_780_Installation_Manual_198201.pdf VAX-11/780 Installation Manual] (EK-SI780-IN-002) - contains a section on the DW780, Chapter 5 (on pp. 40-52 of the PDF)
  
[[Category: VAXen]]
 
 
[[Category: UNIBUS]]
 
[[Category: UNIBUS]]
 +
[[Category: SBI]]

Latest revision as of 21:03, 15 May 2024

The DW780 Unibus Adapter was a UNIBUS bus translator for the VAX-11/780's Synchronous Backplane Interconnect.

It was implemented on four hex cards:

  • M8270 - UBA SBI Interface (USI)
  • M8271 - UBA Control Board (UCB)
  • M8272 - UBA Map and Data Path (UMD)
  • M8273 - UNIBUS Address and Interrupt (UAI)

They mount in a custom 6-slot backplane (normally mounted next to the main CPU backplane). 2 slots (on the back of the backplane) are used to hold double-width i) M9044 UNIBUS terminator, and ii) an M9042 paddle card, which carries the UNIBUS out on three flat cables (DEC part number 70-133622-00), normally to an 'expansion I/O connector' on the side of the cabinet, and thence to a BA11-K mounting box mounted in an expansion cabinet. (There are some 'UNIBUS VAX' configurations where there is a DD11-C or DD11-D backplane in the main cabinet; in these, the flat cables run directly to an M9014 paddle card in the DD11. See pp. 15-16 and 65 of MP00539 for coverage of this configuration; see also chapter 12 of the 'VAX-11/780 Installation Manual'.)

See also

External links