DEC asynchronous serial line pinout - Revision history

Jnc: /* 40 pin header */ complete set

2024-08-02T12:53:31Z

‎40 pin header: complete set

Jnc: Link to new 'D Subminiature Connector' article

2024-08-02T12:50:34Z

Link to new 'D Subminiature Connector' article

Jnc: New cat

2022-06-15T23:17:05Z

New cat

Jnc: /* External links */ +RS232 Connectors

2022-06-03T00:54:20Z

‎External links: +RS232 Connectors

Jnc: /* 40 pin header */ clarify connector sex

2020-10-31T02:26:16Z

‎40 pin header: clarify connector sex

Jnc: Not KL11

2019-07-27T17:34:58Z

Not KL11

Jnc: dup links

2019-07-26T19:28:30Z

dup links

Jnc: /* 10 pin header */ Add links

2019-07-26T19:19:51Z

‎10 pin header: Add links

Jnc: typo

2019-05-23T12:34:07Z

typo

Jnc: +cat

2018-12-16T23:26:38Z

+cat

@@ Line 19: / Line 19: @@
 When looking at a male connector shell (female pins) for the wire, from the side which goes into the header, the pins will be the mirror-image from that, from right to left; from behind the connector shell, where the wires come out, it will be the same as on the header.
-The pins needed for an EIA 'simple' serial line cable (i.e. no modem signals needed), along with the connections for a 'normal' serial cable (i.e. DTE, male DB-25P or DE-9P connector, to plug into a modem), and for a 'null modem' cable (i.e. DCE, female [[D Subminiature Connector|DB-25S]] or [[D Subminiature Connector|DE-9S]], to plug into a terminal) are:
+The pins needed for an EIA 'simple' serial line cable (i.e. no modem signals needed), along with the connections for a 'normal' serial cable (i.e. DTE, male [[D Subminiature Connector|DB-25P]] or [[D Subminiature Connector|DE-9P]] connector, to plug into a modem), and for a 'null modem' cable (i.e. DCE, female [[D Subminiature Connector|DB-25S]] or [[D Subminiature Connector|DE-9S]], to plug into a terminal) are:
 {| class="wikitable"

@@ Line 19: / Line 19: @@
 When looking at a male connector shell (female pins) for the wire, from the side which goes into the header, the pins will be the mirror-image from that, from right to left; from behind the connector shell, where the wires come out, it will be the same as on the header.
-The pins needed for an EIA 'simple' serial line cable (i.e. no modem signals needed), along with the connections for a 'normal' serial cable (i.e. DTE, male DB-25P or DE-9P connector, to plug into a modem), and for a 'null modem' cable (i.e. DCE, female DB-25S or DE-9S, to plug into a terminal) are:
+The pins needed for an EIA 'simple' serial line cable (i.e. no modem signals needed), along with the connections for a 'normal' serial cable (i.e. DTE, male DB-25P or DE-9P connector, to plug into a modem), and for a 'null modem' cable (i.e. DCE, female [[D Subminiature Connector|DB-25S]] or [[D Subminiature Connector|DE-9S]], to plug into a terminal) are:
 {| class="wikitable"

← Older revision		Revision as of 23:17, 15 June 2022
Line 105:		Line 105:
	* [http://avitech.com.au/?page_id=766 RS232 Connectors]		* [http://avitech.com.au/?page_id=766 RS232 Connectors]

−	[[Category: DEC ~~Hardware~~]]	+	[[Category: DEC Electrical]]

← Older revision		Revision as of 00:54, 3 June 2022
Line 100:		Line 100:

	Note also that the 'Clock input' pin allows the stock KDF11-B CPU (11/23+) console cabinet kit to provide baud rate selection on the back panel (using the 'external clock' option on the card). However, an 11/23+ ''will'' work with a stock DLV11-J cable, or a hand-made cable, provided the board is jumpered correctly, to select the desired baud rate. Similarly, the 11/23+ cabinet kit can be used with a DLV11-J, where it will provide external baud rate selection - again, if the board is jumpered correctly (to use the external clock input).		Note also that the 'Clock input' pin allows the stock KDF11-B CPU (11/23+) console cabinet kit to provide baud rate selection on the back panel (using the 'external clock' option on the card). However, an 11/23+ ''will'' work with a stock DLV11-J cable, or a hand-made cable, provided the board is jumpered correctly, to select the desired baud rate. Similarly, the 11/23+ cabinet kit can be used with a DLV11-J, where it will provide external baud rate selection - again, if the board is jumpered correctly (to use the external clock input).
		+
		+	==External links==
		+
		+	* [http://avitech.com.au/?page_id=766 RS232 Connectors]

	[[Category: DEC Hardware]]		[[Category: DEC Hardware]]

@@ Line 15: / Line 15: @@
 ==40 pin header==
-For the 40-pin Berg/DuPont male 'header' (on the board), when looking ''at'' the header face-on (from the side the connector shell on the cable will be plugged into), with the board ''component-side up'', pin 'A' is in the lower left corner, with 'B' above it; they then follow the '[[DEC alphabet]]' ('ABCDEFHJKLMNPRSTUVWXYZ', with G, I, O and Q dropped) for the first 19 pins, and then partially repeat for the next 18 pins, AA-VV.
+For the 40-pin Berg/DuPont female 'header' (on the board; male pins), when looking ''at'' the header face-on (from the side the connector shell on the cable will be plugged into), with the board ''component-side up'', pin 'A' is in the lower left corner, with 'B' above it; they then follow the '[[DEC alphabet]]' ('ABCDEFHJKLMNPRSTUVWXYZ', with G, I, O and Q dropped) for the first 19 pins, and then partially repeat for the next 18 pins, AA-VV.
-When looking at a connector shell for the wire, from the side which goes into the header, the pins will be the mirror-image from that, from right to left; from behind the connector shell, where the wires come out, it will be the same as on the header.
+When looking at a male connector shell (female pins) for the wire, from the side which goes into the header, the pins will be the mirror-image from that, from right to left; from behind the connector shell, where the wires come out, it will be the same as on the header.
 The pins needed for an EIA 'simple' serial line cable (i.e. no modem signals needed), along with the connections for a 'normal' serial cable (i.e. DTE, male DB-25P or DE-9P connector, to plug into a modem), and for a 'null modem' cable (i.e. DCE, female DB-25S or DE-9S, to plug into a terminal) are:

@@ Line 1: / Line 1: @@
 DEC [[asynchronous serial line]] interface boards which supported one, or a small number of, lines all tended to use one of two physical interfaces: a 40 pin [[Berg connector]] .100" header (now often called DuPont or IDC connectors), and later, a 10 pin IDC header; both with a standard pin-out across all instances. Thus, all the interfaces of a given header type all took standard interface cables.
-So, for the [[UNIBUS]], the [[KL11 asynchronous serial line interface|KL11]] (M780), [[DL11 asynchronous serial line|DL11]] (M7800) and DL11-W (M7856) all used the 40-pin format, as did, on the [[QBUS]], the DLV11 (M7940), DLV11-E (M8017), and DLV11-F (M8028).
+So, for the [[UNIBUS]], the [[DL11 asynchronous serial line|DL11]] (M7800) and [[DLV11-W asynchronous serial line interface|DL11-W]] (M7856) both used the 40-pin format, as did, on the [[QBUS]], the [[DLV11 asynchronous serial line interface|DLV11]] (M7940), [[DLV11-E asynchronous serial line interface|DLV11-E]] (M8017), and [[DLV11-F asynchronous serial line interface|DLV11-F]] (M8028).
 On the QBUS, the [[DLV11-J asynchronous serial line interface|DLV11-J]] (M8043), the [[KDF11-B CPU]] (M8189, [[PDP-11/23 PLUS| PDP-11/23+]]), and [[KDJ11-B CPU]] (M8190, used in the [[PDP-11/83]] and [[PDP-11/84]]), used the 10-pin format.

@@ Line 1: / Line 1: @@
 DEC [[asynchronous serial line]] interface boards which supported one, or a small number of, lines all tended to use one of two physical interfaces: a 40 pin [[Berg connector]] .100" header (now often called DuPont or IDC connectors), and later, a 10 pin IDC header; both with a standard pin-out across all instances. Thus, all the interfaces of a given header type all took standard interface cables.
-So, for the [[UNIBUS]], the KL11 (M780), [[DL11 asynchronous serial line|DL11]] (M7800) and DL11-W (M7856) all used the 40-pin format, as did, on the [[QBUS]], the DLV11 (M7940), DLV11-E (M8017), and DLV11-F (M8028).
+So, for the [[UNIBUS]], the [[KL11 asynchronous serial line interface|KL11]] (M780), [[DL11 asynchronous serial line|DL11]] (M7800) and DL11-W (M7856) all used the 40-pin format, as did, on the [[QBUS]], the DLV11 (M7940), DLV11-E (M8017), and DLV11-F (M8028).
-On the QBUS, the DLV11-J (M8043), the [[KDF11-B]] (M8189, [[PDP-11/23 PLUS| PDP-11/23+]]), and [[KDJ11-B]] (M8190, used in the [[PDP-11/83]] and [[PDP-11/84]]), used the 10-pin format.
+On the QBUS, the [[DLV11-J asynchronous serial line interface|DLV11-J]] (M8043), the [[KDF11-B CPU]] (M8189, [[PDP-11/23 PLUS| PDP-11/23+]]), and [[KDJ11-B CPU]] (M8190, used in the [[PDP-11/83]] and [[PDP-11/84]]), used the 10-pin format.
-The 40-pin variant provided both [[EIA RS-232 serial line interface|EIA RS-232]] and [[20mA current loop serial line interface|20mA]] electrical interfaces (on different pins; EIA- and 20mA-specific cables connected to the appropriate pins). The 10-pin variant provided for both EIA RS-232 and [[EIA RS-422 serial line interface|RS-422]] ([[differential pair]]s) (20mA was obsolescent by the time the cards which used this came out).
+The 40-pin variant usually provided both [[EIA RS-232 serial line interface|EIA RS-232]] and [[20mA current loop serial line interface|20mA]] electrical interfaces (on different pins; EIA- and 20mA-specific cables connected to the appropriate pins). The 10-pin variant provided for both EIA RS-232 and [[EIA RS-422 serial line interface|RS-422]] ([[differential pair]]s) (20mA was obsolescent by the time the cards which used this came out).
-Note that the 10-pin variant does not actually include any modem control signals, so one could not connect many actual modems to it.
+Note that the 10-pin variant does not actually include any [[modem]] control signals, so one could not connect many actual modems to it.
 DEC interface cables for these cards (for the 40-pin header, the cable is the BC05C for EIA operation as a DTE, and the BC05M for 20mA current loop; for the 10-pin header, the BC20N is the EIA [[null modem]] DCE cable, and the BC21B is the EIA DTE cable) are now essentially un-obtainable, but they are relatively easy to make; this page provides the information needed to make new cables.
@@ Line 65: / Line 65: @@
 ==10 pin header==
-For the 10-pin male pin [[Berg connector|IDC header]] (on the board), when looking ''at'' the header face-on (from the side the connector shell on the cable will be plugged into), with the board ''component-side up'', pin '1' is in the upper right corner, with pin '2' immediately below it; pin '6' is missing (as an interlock), and pin '10' is in the lower left.
+For the 10-pin male pin IDC header (on the board), when looking ''at'' the header face-on (from the side the connector shell on the cable will be plugged into), with the board ''component-side up'', pin '1' is in the upper right corner, with pin '2' immediately below it; pin '6' is missing (as an interlock), and pin '10' is in the lower left.
-A complete pin-out for the interface is given below. It can be set up to do either [[differential pair|differential]], or [[single-ended signalling|single-ended]]; the usual RS-232 usage is to ground the '-' side of the received data, so it can run single-ended. Again, note that this interface does not include any modem control signals.
+A complete pin-out for the interface is given below. It can be set up to do either differential, or [[single-ended signalling|single-ended]]; the usual RS-232 usage is to ground the '-' side of the received data, so it can run single-ended. Again, note that this interface does not include any modem control signals.
 The table below also gives the connections for a 'normal' serial cable (i.e. DTE, male DB-25P connector, to plug into a 'modem'), and for a 'null modem' cable (i.e. DCE, female DB-25S, to plug into a terminal).
@@ Line 99: / Line 99: @@
 Again, note that DB25 to DB9 adaptors are easily available at modest cost, so it might be desirable to make all PDP-11 cables with DB25 connectors, so that one can be easily interconnect different PDP-11's; a single DB25 to DB9 adaptor will suffice to connect any PDP-11 serial line to a PC.
-Note also that the 'Clock input' pin allows the stock [[KDF11-B CPU]] (11/23+) console cabinet kit to provide baud rate selection on the back panel (using the 'external clock' option on the card). However, an 11/23+ ''will'' work with a stock [[DLV11-J synchronous serial line interface|DLV11-J]] cable, or a hand-made cable, provided the board is jumpered correctly, to select the desired baud rate. Similarly, the 11/23+ cabinet kit can be used with a DLV11-J, where it will provide external baud rate selection - again, if the board is jumpered correctly (to use the external clock input).
+Note also that the 'Clock input' pin allows the stock KDF11-B CPU (11/23+) console cabinet kit to provide baud rate selection on the back panel (using the 'external clock' option on the card). However, an 11/23+ ''will'' work with a stock DLV11-J cable, or a hand-made cable, provided the board is jumpered correctly, to select the desired baud rate. Similarly, the 11/23+ cabinet kit can be used with a DLV11-J, where it will provide external baud rate selection - again, if the board is jumpered correctly (to use the external clock input).
 [[Category: DEC Hardware]]

← Older revision		Revision as of 23:26, 16 December 2018
Line 100:		Line 100:

	Note also that the 'Clock input' pin allows the stock KDF11-B (11/23+) console cabinet kit to provide baud rate selection on the back panel (using the 'external clock' option on the card). However, an 11/23+ ''will'' work with a stock DLV11-J cable, or a hand-made cable, provided the board is jumpered correctly, to select the desired baud rate. Similarly, the 11/23+ cabinet kit can be used with a DLV11-J to provide external baud rate selection - again, if the board is jumpered correctly (to use the external clock input).		Note also that the 'Clock input' pin allows the stock KDF11-B (11/23+) console cabinet kit to provide baud rate selection on the back panel (using the 'external clock' option on the card). However, an 11/23+ ''will'' work with a stock DLV11-J cable, or a hand-made cable, provided the board is jumpered correctly, to select the desired baud rate. Similarly, the 11/23+ cabinet kit can be used with a DLV11-J to provide external baud rate selection - again, if the board is jumpered correctly (to use the external clock input).
		+
		+	[[Category: DEC Hardware]]