DRV11 Parallel Line Unit - Revision history

Jnc: /* Further reading */ +DR11-C vs. DRV11

2024-07-27T11:30:34Z

‎Further reading: +DR11-C vs. DRV11

Jnc: /* External links */ another section

2023-07-07T17:18:08Z

‎External links: another section

Jnc: +flat cables, +links to manual, FMPS

2023-07-05T09:52:35Z

+flat cables, +links to manual, FMPS

Jnc: avoid redir

2020-06-10T02:06:20Z

avoid redir

Jnc: proper sub-cat

2020-06-10T01:48:29Z

proper sub-cat

Jnc: img nm

2020-05-10T17:25:19Z

img nm

Jnc: basically the same as a DR11-C

2020-05-10T16:32:06Z

basically the same as a DR11-C

New page

[[Image:DRV11.jpeg|thumb|200px|right|DRV11 board]]

The '''DRV11 Parallel Line Unit''' was a [[QBUS]] [[device controller]] which provided a pair of 16-[[bit]] parallel ports, one input, and one output. It was a [[DEC card form factor|dual]] format card (M7941); it used [[programmed I/O]]. It was fully [[program compatible]] with the [[UNIBUS]] [[DR11-C general device interface]].

Connection to the [[user]]'s device was via a pair of 40-[[pin]] [[Berg connector]]s. Data going out to the user's device was latched in the DRV11, so may be read at leisure; data coming in from the user's device was merely sampled by the DRV11, so must be held until it has been read.

==Registers==

The device had three control and [[buffer]] [[register]]s, which could be configured to any three sequential [[word]] locations in the I/O page. The first DRV11 was normally configured to [[address]]es 767770-767774; the second to 767760-767764, the third to 767750-767754, and so on.

{| border=1
! Register !! Abbreviation !! Address
|-
|Control and Status Register || DRCSR || 767770
|-
|Output Buffer Register || DROUTBUF || 767772
|-
|Input Buffer Register || DRINBUF || 767774
|}

In the register contents (below), bits which are read/write or unused are shown in normal font, those which are read-only are in ''italics''.

===Status Register (DRCSR)===
{{16bit-header}}
| ''REQ B'' || colspan=7 | Unused || ''REQ A'' || INT ENB A || INT ENB B || colspan=3 | Unused || CSR1 || CSR0
{{16bit-bitout}}

* REQ B - Request B - Signal from user's hardware which can be tested, or cause an [[interrupt]] (below)
* REQ A - Request A
* INT ENB A - Interrupt Enable A - When set, allows setting REQ A to cause an interrupt
* INT ENB B - Interrupt Enable B
* CSR1 - Signal to user's hardware (on connector 1)
* CSR0 - Signal to user's hardware (on connector 2)

===Output Buffer Register (DROUTBUF)===
{{16bit-header}}
| colspan=16 | OUT15 <-> OUT0
{{16bit-bitout}}

===Input Buffer Register (INBUF)===
{{16bit-header}}
| colspan=16 | ''IN15 <-> IN0''
{{16bit-bitout}}

[[Category: QBUS Peripherals]]

@@ Line 45: / Line 45: @@
 ==External links==
-* [http://www.bitsavers.org/pdf/dec/pdp11/1103/EK-LSI11-TM-002.pdf LSI-11, PDP-11/03 user's manual] (EK-LSI11-TM-002) - the DRV11 is covered in Section 6.3 (pp. 96-106 of the PDF)
+* [http://www.bitsavers.org/pdf/dec/pdp11/1103/EK-LSI11-TM-002.pdf LSI-11, PDP-11/03 user's manual] (EK-LSI11-TM-002) - the DRV11 is covered in Sections 4.8 (pp. 73-77 of the PDF) and 6.3 (pp. 96-106)
 * [https://manx-docs.org/collections/hcps/DRV11.pdf DRV11 Field Maintenance Print Set] (MP00054)
 [[Category: QBUS Parallel Interfaces]]

@@ Line 3: / Line 3: @@
 The '''DRV11 Parallel Line Unit''' was a [[QBUS]] [[parallel interface]] [[device controller]] which provided a pair of 16-[[bit]] parallel ports, one input, and one output. It was a [[DEC card form factor|dual]] format card (M7941); it used [[programmed I/O]]. It was fully [[program compatible]] with the [[UNIBUS]] [[DR11-C general device interface]].
-Connection to the [[user]]'s device was via a pair of 40-[[pin]] [[Berg connector]]s. Data going out to the user's device was latched in the DRV11, so may be read at leisure; data coming in from the user's device was merely sampled by the DRV11, so must be held until it has been read.
+Connection to the [[user]]'s device was via a pair of 40-[[pin]] [[Berg connector]]s, into which [[flat cable]]s could plug. Data going out to the user's device was latched in the DRV11, so may be read at leisure; data coming in from the user's device was merely sampled by the DRV11, so must be held until it has been read.
 ==Registers==
@@ Line 42: / Line 42: @@
 | colspan=16 | ''IN15 <-> IN0''
 {{16bit-bitout}}
 [[Category: QBUS Parallel Interfaces]]

@@ Line 1: / Line 1: @@
 [[Image:DRV11.jpg|thumb|200px|right|DRV11 board]]
-The '''DRV11 Parallel Line Unit''' was a [[QBUS]] [[device controller]] which provided a pair of 16-[[bit]] [[parallel port]]s, one input, and one output. It was a [[DEC card form factor|dual]] format card (M7941); it used [[programmed I/O]]. It was fully [[program compatible]] with the [[UNIBUS]] [[DR11-C general device interface]].
+The '''DRV11 Parallel Line Unit''' was a [[QBUS]] [[parallel interface]] [[device controller]] which provided a pair of 16-[[bit]] parallel ports, one input, and one output. It was a [[DEC card form factor|dual]] format card (M7941); it used [[programmed I/O]]. It was fully [[program compatible]] with the [[UNIBUS]] [[DR11-C general device interface]].
 Connection to the [[user]]'s device was via a pair of 40-[[pin]] [[Berg connector]]s. Data going out to the user's device was latched in the DRV11, so may be read at leisure; data coming in from the user's device was merely sampled by the DRV11, so must be held until it has been read.

@@ Line 1: / Line 1: @@
 [[Image:DRV11.jpg|thumb|200px|right|DRV11 board]]
-The '''DRV11 Parallel Line Unit''' was a [[QBUS]] [[device controller]] which provided a pair of 16-[[bit]] parallel ports, one input, and one output. It was a [[DEC card form factor|dual]] format card (M7941); it used [[programmed I/O]]. It was fully [[program compatible]] with the [[UNIBUS]] [[DR11-C general device interface]].
+The '''DRV11 Parallel Line Unit''' was a [[QBUS]] [[device controller]] which provided a pair of 16-[[bit]] [[parallel port]]s, one input, and one output. It was a [[DEC card form factor|dual]] format card (M7941); it used [[programmed I/O]]. It was fully [[program compatible]] with the [[UNIBUS]] [[DR11-C general device interface]].
 Connection to the [[user]]'s device was via a pair of 40-[[pin]] [[Berg connector]]s. Data going out to the user's device was latched in the DRV11, so may be read at leisure; data coming in from the user's device was merely sampled by the DRV11, so must be held until it has been read.
@@ Line 43: / Line 43: @@
 {{16bit-bitout}}
-[[Category: QBUS Peripherals]]
+[[Category: QBUS Parallel Interfaces]]

← Older revision		Revision as of 17:25, 10 May 2020
Line 1:		Line 1:
−	[[Image:DRV11.~~jpeg~~\|thumb\|200px\|right\|DRV11 board]]	+	[[Image:DRV11.jpg\|thumb\|200px\|right\|DRV11 board]]

	The '''DRV11 Parallel Line Unit''' was a [[QBUS]] [[device controller]] which provided a pair of 16-[[bit]] parallel ports, one input, and one output. It was a [[DEC card form factor\|dual]] format card (M7941); it used [[programmed I/O]]. It was fully [[program compatible]] with the [[UNIBUS]] [[DR11-C general device interface]].		The '''DRV11 Parallel Line Unit''' was a [[QBUS]] [[device controller]] which provided a pair of 16-[[bit]] parallel ports, one input, and one output. It was a [[DEC card form factor\|dual]] format card (M7941); it used [[programmed I/O]]. It was fully [[program compatible]] with the [[UNIBUS]] [[DR11-C general device interface]].