DL11 asynchronous serial line interface - Revision history

Jnc: /* External links */ Bitsavers has reorganized a bit

2026-10-04T22:26:44Z

External links: Bitsavers has reorganized a bit

← Older revision		Revision as of 22:26, 4 October 2026
Line 135:		Line 135:
	==External links==		==External links==

	* [http://www.bitsavers.org/pdf/dec/unibus/EK-DL11-OP-001_Sep76.pdf DL11 asynchronous line interface user's manual] (EK-DL11-OP-001)		* [http://www.bitsavers.org/pdf/dec/unibus/DL11/EK-DL11-OP-001_Sep76.pdf DL11 asynchronous line interface user's manual] (EK-DL11-OP-001)
	* [http://www.bitsavers.org/pdf/dec/unibus/EK-DL11-TM-003_DL11_Asynchronous_Line_Interface_Manual_Sep75.pdf DL11 asynchronous line interface manual] (EK-DL11-TM-003) - technical manual		* [http://www.bitsavers.org/pdf/dec/unibus/DL11/EK-DL11-TM-003_DL11_Asynchronous_Line_Interface_Manual_Sep75.pdf DL11 asynchronous line interface manual] (EK-DL11-TM-003) - technical manual
	* [http://www.bitsavers.org/pdf/dec/unibus/DL11_EngrDrws.pdf DL11 asynchronous line interface engineering drawings] - originals		* [http://www.bitsavers.org/pdf/dec/unibus/DL11/DL11_EngrDrws.pdf DL11 asynchronous line interface engineering drawings] - originals
	* [http://www.bitsavers.org/pdf/dec/unibus/DL11_schem_Mar78.pdf DL11 asynchronous line interface engineering drawings] - redrawn		* [http://www.bitsavers.org/pdf/dec/unibus/DL11/DL11_schem_Mar78.pdf DL11 asynchronous line interface engineering drawings] - redrawn
	* [https://chdickman.com/pdp11/Notes/DL11.shtml Notes: DEC DL11]		* [https://chdickman.com/pdp11/Notes/DL11.shtml Notes: DEC DL11]

	[[Category: UNIBUS Asynchronous Serial Interfaces]]		[[Category: UNIBUS Asynchronous Serial Interfaces]]

Jnc: Add links; fmt

2024-09-27T09:23:59Z

Add links; fmt

← Older revision		Revision as of 09:23, 27 September 2024
Line 3:		Line 3:
	The '''DL11 asynchronous serial line interface''' card (M7800) was a [[UNIBUS]] [[peripheral]] for the [[PDP-11]] series of computers which provided a single [[asynchronous serial line]]. It was a [[DEC card form factor\|quad]] format card, and used an [[Small Peripheral Controller\|SPC]] slot.		The '''DL11 asynchronous serial line interface''' card (M7800) was a [[UNIBUS]] [[peripheral]] for the [[PDP-11]] series of computers which provided a single [[asynchronous serial line]]. It was a [[DEC card form factor\|quad]] format card, and used an [[Small Peripheral Controller\|SPC]] slot.

	It provided both [[20mA current loop serial line interface\|20mA]] and (in some versions) [[EIA RS-232 serial line interface\|EIA RS-232]] connectivity at speeds of 110 to 9600 [[baud rate\|baud]] (the range depended on the version); the DL11-E version also provided full [[modem]] control. Line connection was via a 40-pin [[Berg connector]] header on the top edge of the card, using the standard [[DEC asynchronous serial line pinout]]~~. In fact,~~ TTL-level signals ~~are~~ also on this connector.		It provided both [[20mA current loop serial line interface\|20mA]] and (in some versions) [[EIA RS-232 serial line interface\|EIA RS-232]] connectivity at speeds of 110 to 9600 [[baud rate\|baud]] (the range depended on the version); the DL11-E version also provided full [[modem]] control. Line connection was via a 40-pin [[Berg connector]] header on the top edge of the card, using the standard [[DEC asynchronous serial line pinout]]; [[transistor-transistor logic\|TTL]]-level signals were also present on this connector.

	It was a functionally identical single-board replacement for the [[KL11 asynchronous serial line interface]], which consisted of a dual card, along with two standard single card [[FLIP CHIP]]s. The DL11 also made use of the then-new [[Universal Asynchronous Receiver/Transmitter\|UART]] [[MSI]] [[integrated circuit\|chip]].		It was a functionally identical single-board replacement for the [[KL11 asynchronous serial line interface]], which consisted of a dual card, along with two standard single card [[FLIP CHIP]]s. The DL11 also made use of the then-new [[Universal Asynchronous Receiver/Transmitter\|UART]] [[MSI]] [[integrated circuit\|chip]].
Line 13:		Line 13:
	Selecting between current-loop and EIA interface inputs is done by loopbacks on the Berg connector, called "interlock".		Selecting between current-loop and EIA interface inputs is done by loopbacks on the Berg connector, called "interlock".

	* The actual input is TTL on E: labelled "Serial Input TTL" and "Interlock In"		* The actual input is TTL on pin 'E' (labelled "Serial Input TTL" and "Interlock In")
	* The current loop receiver has input on K and S, output on H "20 mA Interlock Out"		* The current loop receiver has input on 'K' and 'S', output on 'H' ("20 mA Interlock Out")
	* The current loop output is on AA and KK		* The current loop output is on 'AA' and 'KK'
	* (optional) EIA level receiver has input on J, output on M "EIA Interlock Out"		* (optional) EIA level receiver has input on 'J', output on 'M' ("EIA Interlock Out")
	* (optional) EIA output is on F		* (optional) EIA output is on 'F'

	So, for current loop, we join H to E (and connect K, S, AA, KK to the communicating system). For EIA we join M to E (and connect at least J, F		So, for current loop, we join H to E (and connect K, S, AA, KK to the communicating system). For EIA we join M to E (and connect at least J, F to the other system.) These configurations are normally done in the cable; see the DL11 manual, tables 3-3 to 3-6.
	to the other system.) These configurations are normally done in the cable; see the DL11 manual, tables 3-3 to 3-6.

	==Programming interface==		==Programming interface==

	The DL11 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 DL11 has two interrupt vectors - again, one receive, and one transmit.		The DL11 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 DL11 has two interrupt vectors - again, one receive, and one transmit.

	For the PDP-11 main console (which is always a KL11/DL11 compatible device), the 'zeroth' DL11, 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.		For the PDP-11 main console (which is always a KL11/DL11 compatible device), the 'zeroth' DL11, 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.

Jonathanjo: Explanation of TTL portion

2024-09-27T07:47:38Z

Explanation of TTL portion

← Older revision		Revision as of 07:47, 27 September 2024
Line 3:		Line 3:
	The '''DL11 asynchronous serial line interface''' card (M7800) was a [[UNIBUS]] [[peripheral]] for the [[PDP-11]] series of computers which provided a single [[asynchronous serial line]]. It was a [[DEC card form factor\|quad]] format card, and used an [[Small Peripheral Controller\|SPC]] slot.		The '''DL11 asynchronous serial line interface''' card (M7800) was a [[UNIBUS]] [[peripheral]] for the [[PDP-11]] series of computers which provided a single [[asynchronous serial line]]. It was a [[DEC card form factor\|quad]] format card, and used an [[Small Peripheral Controller\|SPC]] slot.

	It provided both [[20mA current loop serial line interface\|20mA]] and (in some versions) [[EIA RS-232 serial line interface\|EIA RS-232]] connectivity at speeds of 110 to 9600 [[baud rate\|baud]] (the range depended on the version); the DL11-E version also provided full [[modem]] control. Line connection was via a 40-pin [[Berg connector]] header on the top edge of the card, using the standard [[DEC asynchronous serial line pinout]].		It provided both [[20mA current loop serial line interface\|20mA]] and (in some versions) [[EIA RS-232 serial line interface\|EIA RS-232]] connectivity at speeds of 110 to 9600 [[baud rate\|baud]] (the range depended on the version); the DL11-E version also provided full [[modem]] control. Line connection was via a 40-pin [[Berg connector]] header on the top edge of the card, using the standard [[DEC asynchronous serial line pinout]]. In fact, TTL-level signals are also on this connector.

	It was a functionally identical single-board replacement for the [[KL11 asynchronous serial line interface]], which consisted of a dual card, along with two standard single card [[FLIP CHIP]]s. The DL11 also made use of the then-new [[Universal Asynchronous Receiver/Transmitter\|UART]] [[MSI]] [[integrated circuit\|chip]].		It was a functionally identical single-board replacement for the [[KL11 asynchronous serial line interface]], which consisted of a dual card, along with two standard single card [[FLIP CHIP]]s. The DL11 also made use of the then-new [[Universal Asynchronous Receiver/Transmitter\|UART]] [[MSI]] [[integrated circuit\|chip]].
Line 9:		Line 9:
	The [[TU58]] tape drive is connected to a DL11-type device, so the device [[address]], etc for TU58's are as for DL11's - the [[register]] addresses and [[interrupt vector]]s are those given below for the 'first' DL11 (DL11 #1).		The [[TU58]] tape drive is connected to a DL11-type device, so the device [[address]], etc for TU58's are as for DL11's - the [[register]] addresses and [[interrupt vector]]s are those given below for the 'first' DL11 (DL11 #1).

	==~~Programing~~ interface==		==Connection==

			Selecting between current-loop and EIA interface inputs is done by loopbacks on the Berg connector, called "interlock".

			* The actual input is TTL on E: labelled "Serial Input TTL" and "Interlock In"
			* The current loop receiver has input on K and S, output on H "20 mA Interlock Out"
			* The current loop output is on AA and KK
			* (optional) EIA level receiver has input on J, output on M "EIA Interlock Out"
			* (optional) EIA output is on F

			So, for current loop, we join H to E (and connect K, S, AA, KK to the communicating system). For EIA we join M to E (and connect at least J, F
			to the other system.) These configurations are normally done in the cable; see the DL11 manual, tables 3-3 to 3-6.

			==Programming interface==

	The DL11 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 DL11 has two interrupt vectors - again, one receive, and one transmit.		The DL11 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 DL11 has two interrupt vectors - again, one receive, and one transmit.
Line 113:		Line 126:
	Only the -C through -E could be ordered with the 4th (9600-baud capable) crystal (it is not known whether the earlier ones would work if this crystal were inserted). Only the -E provided full modem control.		Only the -C through -E could be ordered with the 4th (9600-baud capable) crystal (it is not known whether the earlier ones would work if this crystal were inserted). Only the -E provided full modem control.

	The -A and -C versions are easy to identify visually; they are both missing a large number of components. How to tell the others apart (if, indeed, there is any difference between the -D and -E) is not yet documented.		The -A and -C versions are easy to identify visually; they are both missing a large number of components (five 14-pin chips including 1488, 1489 which are RS-232 receiver and driver chips).

			How to tell the others apart (if, indeed, there is any difference between the -D and -E) is not yet documented.

	==See also==		==See also==

Jnc: /* External links */ + Notes: DEC DL11

2024-02-06T15:22:11Z

External links: + Notes: DEC DL11

← Older revision		Revision as of 15:22, 6 February 2024
Line 125:		Line 125:
	* [http://www.bitsavers.org/pdf/dec/unibus/DL11_EngrDrws.pdf DL11 asynchronous line interface engineering drawings] - originals		* [http://www.bitsavers.org/pdf/dec/unibus/DL11_EngrDrws.pdf DL11 asynchronous line interface engineering drawings] - originals
	* [http://www.bitsavers.org/pdf/dec/unibus/DL11_schem_Mar78.pdf DL11 asynchronous line interface engineering drawings] - redrawn		* [http://www.bitsavers.org/pdf/dec/unibus/DL11_schem_Mar78.pdf DL11 asynchronous line interface engineering drawings] - redrawn
			* [https://chdickman.com/pdp11/Notes/DL11.shtml Notes: DEC DL11]

	[[Category: UNIBUS Asynchronous Serial Interfaces]]		[[Category: UNIBUS Asynchronous Serial Interfaces]]

Jnc: Used a UART

2023-02-18T02:06:04Z

Used a UART

← Older revision		Revision as of 02:06, 18 February 2023
Line 5:		Line 5:
	It provided both [[20mA current loop serial line interface\|20mA]] and (in some versions) [[EIA RS-232 serial line interface\|EIA RS-232]] connectivity at speeds of 110 to 9600 [[baud rate\|baud]] (the range depended on the version); the DL11-E version also provided full [[modem]] control. Line connection was via a 40-pin [[Berg connector]] header on the top edge of the card, using the standard [[DEC asynchronous serial line pinout]].		It provided both [[20mA current loop serial line interface\|20mA]] and (in some versions) [[EIA RS-232 serial line interface\|EIA RS-232]] connectivity at speeds of 110 to 9600 [[baud rate\|baud]] (the range depended on the version); the DL11-E version also provided full [[modem]] control. Line connection was via a 40-pin [[Berg connector]] header on the top edge of the card, using the standard [[DEC asynchronous serial line pinout]].

	It was a functionally identical single-board replacement for the [[KL11 asynchronous serial line interface]], which consisted of a dual card, along with two standard single card [[FLIP CHIP]]s.		It was a functionally identical single-board replacement for the [[KL11 asynchronous serial line interface]], which consisted of a dual card, along with two standard single card [[FLIP CHIP]]s. The DL11 also made use of the then-new [[Universal Asynchronous Receiver/Transmitter\|UART]] [[MSI]] [[integrated circuit\|chip]].

	The [[TU58]] tape drive is connected to a DL11-type device, so the device [[address]], etc for TU58's are as for DL11's - the [[register]] addresses and [[interrupt vector]]s are those given below for the 'first' DL11 (DL11 #1).		The [[TU58]] tape drive is connected to a DL11-type device, so the device [[address]], etc for TU58's are as for DL11's - the [[register]] addresses and [[interrupt vector]]s are those given below for the 'first' DL11 (DL11 #1).

Jnc: New cat scheme

2023-02-17T09:51:48Z

New cat scheme

← Older revision		Revision as of 09:51, 17 February 2023
Line 126:		Line 126:
	* [http://www.bitsavers.org/pdf/dec/unibus/DL11_schem_Mar78.pdf DL11 asynchronous line interface engineering drawings] - redrawn		* [http://www.bitsavers.org/pdf/dec/unibus/DL11_schem_Mar78.pdf DL11 asynchronous line interface engineering drawings] - redrawn

	[[Category: UNIBUS ~~Serial Interfaces]]~~		[[Category: UNIBUS Asynchronous Serial Interfaces]]
	~~[[Category: DEC~~ Asynchronous Serial Interfaces]]

Jnc: New cat

2022-08-17T12:19:27Z

New cat

← Older revision		Revision as of 12:19, 17 August 2022
Line 127:		Line 127:

	[[Category: UNIBUS Serial Interfaces]]		[[Category: UNIBUS Serial Interfaces]]
			[[Category: DEC Asynchronous Serial Interfaces]]

Jnc: /* External links */ +Manuals, eng drws

2021-12-02T00:19:00Z

External links: +Manuals, eng drws

← Older revision		Revision as of 00:19, 2 December 2021
Line 114:		Line 114:

	The -A and -C versions are easy to identify visually; they are both missing a large number of components. How to tell the others apart (if, indeed, there is any difference between the -D and -E) is not yet documented.		The -A and -C versions are easy to identify visually; they are both missing a large number of components. How to tell the others apart (if, indeed, there is any difference between the -D and -E) is not yet documented.

			==See also==

			* [[DL11-W serial line unit/real-time clock option]]

			==External links==

			* [http://www.bitsavers.org/pdf/dec/unibus/EK-DL11-OP-001_Sep76.pdf DL11 asynchronous line interface user's manual] (EK-DL11-OP-001)
			* [http://www.bitsavers.org/pdf/dec/unibus/EK-DL11-TM-003_DL11_Asynchronous_Line_Interface_Manual_Sep75.pdf DL11 asynchronous line interface manual] (EK-DL11-TM-003) - technical manual
			* [http://www.bitsavers.org/pdf/dec/unibus/DL11_EngrDrws.pdf DL11 asynchronous line interface engineering drawings] - originals
			* [http://www.bitsavers.org/pdf/dec/unibus/DL11_schem_Mar78.pdf DL11 asynchronous line interface engineering drawings] - redrawn

	[[Category: UNIBUS Serial Interfaces]]		[[Category: UNIBUS Serial Interfaces]]

Jnc: Add image

2019-09-25T21:52:18Z

Add image

← Older revision		Revision as of 21:52, 25 September 2019
Line 1:		Line 1:
			[[Image:M7800DL11E.jpg\|300px\|thumb\|right\|DL11-E card]]

	The '''DL11 asynchronous serial line interface''' card (M7800) was a [[UNIBUS]] [[peripheral]] for the [[PDP-11]] series of computers which provided a single [[asynchronous serial line]]. It was a [[DEC card form factor\|quad]] format card, and used an [[Small Peripheral Controller\|SPC]] slot.		The '''DL11 asynchronous serial line interface''' card (M7800) was a [[UNIBUS]] [[peripheral]] for the [[PDP-11]] series of computers which provided a single [[asynchronous serial line]]. It was a [[DEC card form factor\|quad]] format card, and used an [[Small Peripheral Controller\|SPC]] slot.

Jnc: Better cat, link

2018-11-20T20:23:50Z

Better cat, link

← Older revision		Revision as of 20:23, 20 November 2018
Line 1:		Line 1:
	The '''DL11 asynchronous serial line interface''' card (M7800) was a [[UNIBUS]] ~~card~~ for the [[PDP-11]] series of computers~~; it~~ was a [[DEC card form factor\|quad]] format card, and used an [[Small Peripheral Controller\|SPC]] slot.		The '''DL11 asynchronous serial line interface''' card (M7800) was a [[UNIBUS]] [[peripheral]] for the [[PDP-11]] series of computers which provided a single [[asynchronous serial line]]. It was a [[DEC card form factor\|quad]] format card, and used an [[Small Peripheral Controller\|SPC]] slot.

	It provided both [[20mA current loop serial line interface\|20mA]] and (in some versions) [[EIA RS-232 serial line interface\|EIA RS-232]] connectivity at speeds of 110 to 9600 [[baud rate\|baud]] (the range depended on the version); the DL11-E version also provided full [[modem]] control. Line connection was via a 40-pin [[Berg connector]] header on the top edge of the card, using the standard [[DEC asynchronous serial line pinout]].		It provided both [[20mA current loop serial line interface\|20mA]] and (in some versions) [[EIA RS-232 serial line interface\|EIA RS-232]] connectivity at speeds of 110 to 9600 [[baud rate\|baud]] (the range depended on the version); the DL11-E version also provided full [[modem]] control. Line connection was via a 40-pin [[Berg connector]] header on the top edge of the card, using the standard [[DEC asynchronous serial line pinout]].
Line 113:		Line 113:
	The -A and -C versions are easy to identify visually; they are both missing a large number of components. How to tell the others apart (if, indeed, there is any difference between the -D and -E) is not yet documented.		The -A and -C versions are easy to identify visually; they are both missing a large number of components. How to tell the others apart (if, indeed, there is any difference between the -D and -E) is not yet documented.

	~~{{PDP-11}}~~		[[Category: UNIBUS Serial Interfaces]]

	[[Category:UNIBUS ~~Peripherals~~]]