DL11 asynchronous serial line interface - Revision history

Jnc: Add links; fmt

2024-09-27T09:23:59Z

Add links; fmt

Jonathanjo: Explanation of TTL portion

2024-09-27T07:47:38Z

Explanation of TTL portion

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

2024-02-06T15:22:11Z

‎External links: + Notes: DEC DL11

Jnc: Used a UART

2023-02-18T02:06:04Z

Used a UART

Jnc: New cat scheme

2023-02-17T09:51:48Z

New cat scheme

Jnc: New cat

2022-08-17T12:19:27Z

New cat

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

2021-12-02T00:19:00Z

‎External links: +Manuals, eng drws

Jnc: Add image

2019-09-25T21:52:18Z

Add image

Jnc: Better cat, link

2018-11-20T20:23:50Z

Better cat, link

Jnc: /* Configuration */ clarify

2018-09-08T21:59:50Z

‎Configuration: clarify

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 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]].
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 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.
 ==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.

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 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]].
@@ 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).
-==Programing interface==
+==Connection==
 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.
-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).
 ==See also==

@@ 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_schem_Mar78.pdf DL11 asynchronous line interface engineering drawings] - redrawn
 [[Category: UNIBUS Asynchronous Serial Interfaces]]

@@ 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 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).

← Older revision		Revision as of 09:51, 17 February 2023
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	* [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]]

← Older revision		Revision as of 12:19, 17 August 2022
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	[[Category: UNIBUS Serial Interfaces]]		[[Category: UNIBUS Serial Interfaces]]
		+	[[Category: DEC Asynchronous Serial Interfaces]]

← 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]]

← Older revision		Revision as of 21:52, 25 September 2019
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		+	[[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.

@@ 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]].
@@ 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.
-{{PDP-11}}
+[[Category: UNIBUS Serial Interfaces]]

@@ Line 17: / Line 17: @@
 ==Configuration==
-The bus address, interrupt vector, and line parameters ([[parity]], stop bits, and data bits) were selected by soldered [[jumper]]s; the baud rate was set by a combination of a replaceable crystal (several different ones were standard), and a pair of 10-position dial selectors (one for transmit, one for receive) which selected a rate:
+The bus address, interrupt vector, and line parameters ([[parity]], number of stop and data bits) were selected by soldered [[jumper]]s; the baud rate was set by a combination of a replaceable crystal (several different ones were standard), and a pair of 10-position dial selectors (one for transmit, one for receive) which selected a rate:
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