DLV11-F asynchronous serial line interface - Revision history

Jnc: /* Further reading */ +DLV11-F Replacement for the DLV11

2024-07-25T13:16:40Z

‎Further reading: +DLV11-F Replacement for the DLV11

Jnc: New cat scheme

2023-02-16T23:19:58Z

New cat scheme

Jnc: New cat

2022-08-16T19:48:42Z

New cat

Jnc: Config, manual, FMPS

2022-01-21T22:33:46Z

Config, manual, FMPS

Jnc: +img

2020-10-16T22:25:51Z

+img

Jnc: Fairly complete

2019-07-27T18:56:25Z

Fairly complete

New page

The '''DLV11-F asynchronous serial line interface''' card (M8028) was a [[QBUS]] [[peripheral]] for the [[PDP-11]] series of computers which provided an [[asynchronous serial line]] on a single [[DEC card form factor|dual-width]] card.

It provided both [[EIA RS-232 serial line interface|EIA RS-232]] (with vestigial [[modem]] control), and active or passive [[20mA current loop serial line interface|20 mA]] connectivity. [[Baud rate]]s from 50 to 19,200 were available; receive and transmit can be set independently via configuration [[jumper]]s, or can be set via the [[register]]s, if desired (although not independently; either transmit only, or both).

Line connection was via 40-pin [[Berg connector]] headers on the top edge of the card, using the standard [[DEC asynchronous serial line pinout]].

==Programing interface==

Like the ancestral [[KL11 asynchronous serial line interface|KL11]], the DLV11 has 2 device registers for the receive side (one Control and Status Register - CSR - and one data [[buffer]] register), and similarly, two for the transmit side. Each line has two [[interrupt vector]]s - again, one receive, and one transmit.

For the PDP-11 main console (which is always a KL11/DL11 compatible device), the standard is that 0777560 is the base address (so the receiver registers are 0777560-2, and the transmitter are 0777564-6), and 060 is the base vector. It can be set to [[halt]] the [[Central Processing Unit|CPU]] when a '[[asynchronous serial line|break]]' is seen; it can also send a 'break'.

The first line after the console is always assigned the address 0776500, and vector 0300. Additional lines are assigned addresses and vectors immediately following, for DL11's #1-#16 (i.e. 0776500-676 and 0300-0476).

==Layout==

The 'Revison C' [[printed circuit board|PCB]] layout is significantly different from the earlier ones; it is easy to recognize this version visually, as the large [[asynchronous serial line#UART|UART]] chip is parallel to the long axis of the card. This version is not covered in most DLV11-F documentation; it can be found in the ''"Microcomputer Interfaces Handbook"'' (1983-84), on pg. 244.

==See also==

* [[DLV11 asynchronous serial line interface]]
* [[DLV11-E asynchronous serial line interface]]
* [[DLV11-J asynchronous serial line interface]]

[[Category: QBUS Serial Interfaces]]

← Older revision		Revision as of 23:19, 16 February 2023
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	* [https://manx-docs.org/collections/hcps/DLV11.pdf DLV11-F Field Maintenance Print Set] (MP00461)		* [https://manx-docs.org/collections/hcps/DLV11.pdf DLV11-F Field Maintenance Print Set] (MP00461)

−	[[Category: QBUS ~~Serial Interfaces]]~~	+	[[Category: QBUS Asynchronous Serial Interfaces]]
−	~~[[Category: DEC~~ Asynchronous Serial Interfaces]]

← Older revision		Revision as of 19:48, 16 August 2022
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	[[Category: QBUS Serial Interfaces]]		[[Category: QBUS Serial Interfaces]]
		+	[[Category: DEC Asynchronous Serial Interfaces]]

@@ Line 26: / Line 26: @@
 * [[DLV11-E asynchronous serial line interface]]
 * [[DLV11-J asynchronous serial line interface]]
 ==External links==

@@ Line 3: / Line 3: @@
 The '''DLV11-F asynchronous serial line interface''' card (M8028) was a [[QBUS]] [[peripheral]] for the [[PDP-11]] series of computers which provided an [[asynchronous serial line]] on a single [[DEC card form factor|dual-width]] card.
-It provided both [[EIA RS-232 serial line interface|EIA RS-232]] (with vestigial [[modem]] control), and active or passive [[20mA current loop serial line interface|20 mA]] connectivity. [[Baud rate]]s from 50 to 19,200 were available; receive and transmit can be set independently via configuration [[jumper]]s, or can be set via the [[register]]s, if desired (although not independently; either transmit only, or both).
+It provided both [[EIA RS-232 serial line interface|EIA RS-232]] (with vestigial [[modem]] control), and [[20mA current loop serial line interface#'Active' and 'passive' modes|active or passive]] [[20mA current loop serial line interface|20 mA]] connectivity. [[Baud rate]]s from 50 to 19,200 were available; receive and transmit can be set independently via configuration [[jumper]]s, or can be set via the [[register]]s, if desired (although not input and output independently; either transmit only, or both).
 Line connection was via 40-pin [[Berg connector]] headers on the top edge of the card, using the standard [[DEC asynchronous serial line pinout]].
 ==Programing interface==
@@ Line 17: / Line 19: @@
 ==Layout==
-The 'Revison C' and later [[printed circuit board|PCB]] layouts are significantly different from the earlier ones; it is easy to recognize these versions visually, as the large [[asynchronous serial line#UART|UART]] chip is parallel to the long axis of the card. These versions are not covered in most DLV11-F documentation; they can be found in the ''"Microcomputer Interfaces Handbook"'' (1983-84), on pg. 244.
+The 'Revison C' and later [[printed circuit board|PCB]] layouts are significantly different from the earlier ones; it is easy to recognize these versions visually, as the large [[asynchronous serial line#UART|UART]] chip is parallel to the long axis of the card. These versions are not covered in most DLV11-F documentation; they can be found in the ''"Microcomputer Interfaces Handbook"'' (1980), on pg. 207.
 ==See also==
@@ Line 24: / Line 26: @@
 * [[DLV11-E asynchronous serial line interface]]
 * [[DLV11-J asynchronous serial line interface]]
 [[Category: QBUS Serial Interfaces]]