Difference between revisions of "DR11-B parallel interface"

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m (Implementation: update)
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The modules are:
 
The modules are:
  
* M112 - NOR gates
+
* M112 - 10 x 2-input NOR gates
 
* M113 - 10 x 2-input NAND gates
 
* M113 - 10 x 2-input NAND gates
* M116 - NOR gates
+
* M116 - 6 x 4-input NOR gates
 
* M205 - 5 x 'D' flip flops
 
* M205 - 5 x 'D' flip flops
* M208 - 8-bit buffer / shift-register
+
* 2 x M208 - 8-bit buffer / shift-register
* M239 - Status and Command Register
+
* M239 - 3 x 4-bit counter/register
 
* 2 x M611 - High speed power inverters
 
* 2 x M611 - High speed power inverters
 
* M796 - UNIBUS Master Control
 
* M796 - UNIBUS Master Control
 
* M7821 - Interrupt Control
 
* M7821 - Interrupt Control
 
* M7219 - Bus Interface
 
* M7219 - Bus Interface
 +
 +
The M239's are used to hold the Status and Command Register.
  
 
The M7219 is a [[DEC card form factor|quad]] card; the others are all single. (The M796 and M7821 are [[DEC card form factor|extended length]]; the others are all standard length.)
 
The M7219 is a [[DEC card form factor|quad]] card; the others are all single. (The M796 and M7821 are [[DEC card form factor|extended length]]; the others are all standard length.)
  
 
Connection to the user device is via either a pair of M957 Split-Lug Cable boards, or via an M9760 (dual) Twisted Pair Cable Connector board. The M9680 (dual) board is a loopback test board, which can be used in place of the user connection board(s).
 
Connection to the user device is via either a pair of M957 Split-Lug Cable boards, or via an M9760 (dual) Twisted Pair Cable Connector board. The M9680 (dual) board is a loopback test board, which can be used in place of the user connection board(s).

Revision as of 18:13, 4 June 2017

The DR11-B was a parallel interface for the UNIBUS which used DMA to transfer data.

Implementation

It was constructed from a number of smaller Flip Chips which were installed in custom 4-slot system unit backplane. The extant DR11-B documentation does not show either the modules used in the DR11-B, or their locations in the backplane.

The modules are:

  • M112 - 10 x 2-input NOR gates
  • M113 - 10 x 2-input NAND gates
  • M116 - 6 x 4-input NOR gates
  • M205 - 5 x 'D' flip flops
  • 2 x M208 - 8-bit buffer / shift-register
  • M239 - 3 x 4-bit counter/register
  • 2 x M611 - High speed power inverters
  • M796 - UNIBUS Master Control
  • M7821 - Interrupt Control
  • M7219 - Bus Interface

The M239's are used to hold the Status and Command Register.

The M7219 is a quad card; the others are all single. (The M796 and M7821 are extended length; the others are all standard length.)

Connection to the user device is via either a pair of M957 Split-Lug Cable boards, or via an M9760 (dual) Twisted Pair Cable Connector board. The M9680 (dual) board is a loopback test board, which can be used in place of the user connection board(s).