Difference between revisions of "DR11-L general-purpose interface"
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The '''DR11-L general-purpose interface''' was a [[UNIBUS]] [[device controller]] which provided a pair of 16-[[bit]] parallel ports, both input-only. It was a [[DEC card form factor|quad]] format card ('''M7864'''), and used an [[Small Peripheral Controller|SPC]] slot; it used [[programmed I/O]]. | The '''DR11-L general-purpose interface''' was a [[UNIBUS]] [[device controller]] which provided a pair of 16-[[bit]] parallel ports, both input-only. It was a [[DEC card form factor|quad]] format card ('''M7864'''), and used an [[Small Peripheral Controller|SPC]] slot; it used [[programmed I/O]]. | ||
Revision as of 20:25, 16 April 2020
The DR11-L general-purpose interface was a UNIBUS device controller which provided a pair of 16-bit parallel ports, both input-only. It was a quad format card (M7864), and used an SPC slot; it used programmed I/O.
Connection to the user's device is via a pair of 40-pin Berg connectors; each is controlled by a separate set of registers (identical for the two connectors).
The DR11-L is roughly an input-only version of the earlier DR11-C general device interface, but is not program compatible with the DR11-C.
