KW11-L Line Time Clock - Revision history

Jnc: /* External links */ +eng drw, manual

2022-02-07T23:58:16Z

‎External links: +eng drw, manual

Jnc: avoid redir

2021-12-02T00:01:24Z

avoid redir

Jnc: +Link LTC

2021-12-01T02:20:32Z

+Link LTC

Jnc: +link

2020-02-04T15:15:06Z

+link

Jnc: Add board no, other implms

2020-01-14T01:01:52Z

Add board no, other implms

Jnc: +image

2019-09-28T18:11:58Z

+image

Jnc: Correct cat

2018-05-10T13:06:30Z

Correct cat

Jnc: Pretty complete

2018-05-10T12:58:08Z

Pretty complete

New page

The '''KW11-L Line Time Clock''' is a [[UNIBUS]] [[device]] option which provides clock [[interrupt]]s at a rate of 50 or 60 Hz, driven from the [[alternating current|AC]] power provided to the [[Central Processing Unit|CPU]]'s [[power supply]].

The programming interface is extremely simple; there is one [[register]], with two [[bit]]s; one to enable interrupts, and one which is set for every clock cycle (and causes an interrupt when that happens, if the other bit is set).

Physically, it is an [[DEC card form factor|extended-length]] single-height board, which plugs into a dedicated slot in the CPU's [[backplane]].

Only the [[PDP-11/20]], [[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] support it. On later machines (e.g. the [[PDP-11/04]] and [[PDP-11/34]]), the functionality was included in the [[DL11-W asynchronous serial line interface|DL11-W]].

{{PDP-11}}

[[Category: UNIBUS devices]]

← Older revision		Revision as of 23:58, 7 February 2022
Line 6:		Line 6:

	Physically, the original KW11-L is an [[DEC card form factor\|extended-length]] single-height board ('''M787'''), which plugs into a dedicated slot in the CPU's [[backplane]]. Only the [[PDP-11/20]], [[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] support the original card, although later [[PDP-11]]'s generally provided a [[program compatible]] equivalent. E.g. on later UNIBUS machines (e.g. the [[PDP-11/04]] and [[PDP-11/34]]), the functionality was included in the [[DL11-W serial line unit/real-time clock option\|DL11-W]].		Physically, the original KW11-L is an [[DEC card form factor\|extended-length]] single-height board ('''M787'''), which plugs into a dedicated slot in the CPU's [[backplane]]. Only the [[PDP-11/20]], [[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] support the original card, although later [[PDP-11]]'s generally provided a [[program compatible]] equivalent. E.g. on later UNIBUS machines (e.g. the [[PDP-11/04]] and [[PDP-11/34]]), the functionality was included in the [[DL11-W serial line unit/real-time clock option\|DL11-W]].
		+
		+	==External links==
		+
		+	* [http://www.bitsavers.org/pdf/dec/pdp11/1140/EK-KW11L_TM-002_KW11-L_Line_Time_Clock_Manual_Jul74.pdf KW11-L line time clock manual] (EK-KW11L-TM-002)
		+	* [http://www.bitsavers.org/pdf/dec/unibus/KW11-L_schem_Jul72.pdf KW11-L line time clock engineering drawings]

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

@@ Line 5: / Line 5: @@
 The programming interface is extremely simple; there is one [[register]], with two [[bit]]s; one to enable interrupts, and one which is set for every clock cycle (and causes an interrupt when that happens, if the other bit is set).
-Physically, the original KW11-L is an [[DEC card form factor|extended-length]] single-height board ('''M787'''), which plugs into a dedicated slot in the CPU's [[backplane]]. Only the [[PDP-11/20]], [[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] support the original card, although later [[PDP-11]]'s generally provided a [[program compatible]] equivalent. E.g. on later UNIBUS machines (e.g. the [[PDP-11/04]] and [[PDP-11/34]]), the functionality was included in the [[DL11-W asynchronous serial line interface|DL11-W]].
+Physically, the original KW11-L is an [[DEC card form factor|extended-length]] single-height board ('''M787'''), which plugs into a dedicated slot in the CPU's [[backplane]]. Only the [[PDP-11/20]], [[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] support the original card, although later [[PDP-11]]'s generally provided a [[program compatible]] equivalent. E.g. on later UNIBUS machines (e.g. the [[PDP-11/04]] and [[PDP-11/34]]), the functionality was included in the [[DL11-W serial line unit/real-time clock option|DL11-W]].
 [[Category: UNIBUS Peripherals]]

@@ Line 1: / Line 1: @@
 [[Image:M787-KW11-L.jpg|300px|thumb|right|KW11-L card]]
-The '''KW11-L Line Time Clock''' is a [[UNIBUS]] [[device]] option which provides [[clock]] [[interrupt]]s at a rate of 50 or 60 Hz, driven from the [[alternating current|AC]] power provided to the [[Central Processing Unit|CPU]]'s [[power supply]].
+The '''KW11-L Line Time Clock''' is a [[UNIBUS]] [[device]] option which provides a [[line time clock]], producing [[interrupt]]s at a rate of 50 or 60 Hz, driven from the [[alternating current|AC]] power provided to the [[Central Processing Unit|CPU]]'s [[power supply]].
 The programming interface is extremely simple; there is one [[register]], with two [[bit]]s; one to enable interrupts, and one which is set for every clock cycle (and causes an interrupt when that happens, if the other bit is set).
 Physically, the original KW11-L is an [[DEC card form factor|extended-length]] single-height board ('''M787'''), which plugs into a dedicated slot in the CPU's [[backplane]]. Only the [[PDP-11/20]], [[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] support the original card, although later [[PDP-11]]'s generally provided a [[program compatible]] equivalent. E.g. on later UNIBUS machines (e.g. the [[PDP-11/04]] and [[PDP-11/34]]), the functionality was included in the [[DL11-W asynchronous serial line interface|DL11-W]].
 [[Category: UNIBUS Peripherals]]

@@ Line 5: / Line 5: @@
 The programming interface is extremely simple; there is one [[register]], with two [[bit]]s; one to enable interrupts, and one which is set for every clock cycle (and causes an interrupt when that happens, if the other bit is set).
-Physically, the original KW11-L is an [[DEC card form factor|extended-length]] single-height board ('''M787'''), which plugs into a dedicated slot in the CPU's [[backplane]]. Only the [[PDP-11/20]], [[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] support the original card, although later [[PDP-11]]'s generally provided a program-compatible equivalent. E.g. on later UNIBUS machines (e.g. the [[PDP-11/04]] and [[PDP-11/34]]), the functionality was included in the [[DL11-W asynchronous serial line interface|DL11-W]].
+Physically, the original KW11-L is an [[DEC card form factor|extended-length]] single-height board ('''M787'''), which plugs into a dedicated slot in the CPU's [[backplane]]. Only the [[PDP-11/20]], [[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] support the original card, although later [[PDP-11]]'s generally provided a [[program compatible]] equivalent. E.g. on later UNIBUS machines (e.g. the [[PDP-11/04]] and [[PDP-11/34]]), the functionality was included in the [[DL11-W asynchronous serial line interface|DL11-W]].
 {{PDP-11}}
 [[Category: UNIBUS Peripherals]]

@@ Line 1: / Line 1: @@
 [[Image:M787-KW11-L.jpg|300px|thumb|right|KW11-L card]]
-The '''KW11-L Line Time Clock''' is a [[UNIBUS]] [[device]] option which provides clock [[interrupt]]s at a rate of 50 or 60 Hz, driven from the [[alternating current|AC]] power provided to the [[Central Processing Unit|CPU]]'s [[power supply]].
+The '''KW11-L Line Time Clock''' is a [[UNIBUS]] [[device]] option which provides [[clock]] [[interrupt]]s at a rate of 50 or 60 Hz, driven from the [[alternating current|AC]] power provided to the [[Central Processing Unit|CPU]]'s [[power supply]].
 The programming interface is extremely simple; there is one [[register]], with two [[bit]]s; one to enable interrupts, and one which is set for every clock cycle (and causes an interrupt when that happens, if the other bit is set).
-Physically, it is an [[DEC card form factor|extended-length]] single-height board, which plugs into a dedicated slot in the CPU's [[backplane]].
+Physically, the original KW11-L is an [[DEC card form factor|extended-length]] single-height board ('''M787'''), which plugs into a dedicated slot in the CPU's [[backplane]]. Only the [[PDP-11/20]], [[PDP-11/40]], [[PDP-11/45]] and [[PDP-11/70]] support the original card, although later [[PDP-11]]'s generally provided a program-compatible equivalent. E.g. on later UNIBUS machines (e.g. the [[PDP-11/04]] and [[PDP-11/34]]), the functionality was included in the [[DL11-W asynchronous serial line interface|DL11-W]].
 {{PDP-11}}
 [[Category: UNIBUS Peripherals]]

← Older revision		Revision as of 18:11, 28 September 2019
Line 1:		Line 1:
		+	[[Image:M787-KW11-L.jpg\|300px\|thumb\|right\|KW11-L card]]
		+
	The '''KW11-L Line Time Clock''' is a [[UNIBUS]] [[device]] option which provides clock [[interrupt]]s at a rate of 50 or 60 Hz, driven from the [[alternating current\|AC]] power provided to the [[Central Processing Unit\|CPU]]'s [[power supply]].		The '''KW11-L Line Time Clock''' is a [[UNIBUS]] [[device]] option which provides clock [[interrupt]]s at a rate of 50 or 60 Hz, driven from the [[alternating current\|AC]] power provided to the [[Central Processing Unit\|CPU]]'s [[power supply]].

← Older revision		Revision as of 13:06, 10 May 2018
Line 9:		Line 9:
	{{PDP-11}}		{{PDP-11}}

−	[[Category: UNIBUS ~~devices~~]]	+	[[Category: UNIBUS Peripherals]]