DEC card form factor - Revision history

Vaxorcist: Added VAX-11/750 extended hex form factor

2022-05-24T10:02:33Z

Added VAX-11/750 extended hex form factor

Jnc: typos, +link

2022-04-09T15:30:18Z

typos, +link

Jnc: /* External links */ +Douglas Electronics

2022-04-09T15:19:35Z

‎External links: +Douglas Electronics

Jnc: /* See also */ +FLIP CHIP

2021-10-17T21:13:47Z

‎See also: +FLIP CHIP

Jdl: Added pointer to mechanical specifications in legacy DEC document hosted at bitsavers.

2021-10-16T03:07:00Z

Added pointer to mechanical specifications in legacy DEC document hosted at bitsavers.

Jnc: clarify a bit

2021-03-29T16:09:56Z

clarify a bit

Jnc: fix link

2019-11-22T21:12:14Z

fix link

Jnc: +cat

2018-12-16T04:04:04Z

+cat

Jnc: Link to contact id page

2018-01-03T21:42:04Z

Link to contact id page

Jnc: Move connector/contact ID info to sparate page

2017-12-16T23:39:57Z

Move connector/contact ID info to sparate page

← Older revision		Revision as of 10:02, 24 May 2022
Line 10:		Line 10:

	Finally, as production processes improved, and leading signals from board to board became undesirable, even longer hex boards were introduced; these first appeared in the [[VAX-11/780]], and were called '''super hex''' boards within DEC.		Finally, as production processes improved, and leading signals from board to board became undesirable, even longer hex boards were introduced; these first appeared in the [[VAX-11/780]], and were called '''super hex''' boards within DEC.
		+
		+	The [[VAX-11/750]] was built from '''extended hex''' boards. The total width was still standard hex, but there were three groups of 37 edge connector contacts now with a narrower pitch.

	==Specifications==		==Specifications==

@@ Line 1: / Line 1: @@
-Many different [[DEC]] computers (e.g. [[PDP-8 family|PDP-8]], [[PDP-10]], [[PDP-11]]) used a standard set of board sizes, in part because they all used [[FLIP CHIP]]s.
+Many different [[Digital Equipment Corporation|DEC]] computers (e.g. [[PDP-8 family|PDP-8]], [[PDP-10]], [[PDP-11]]) used a standard set of board sizes, in part because they all used [[FLIP CHIP]]s.
 The original small '''standard length''' FLIP CHIPs (used in the PDP-8 and [[KA10]] PDP-10 processor) had a total board size of 4.93 inches (from the far end of the edge connector contacts, to the handle end of the board) by 2.437 inches (from one side to the other). From this basic size, a large array of other sizes was built up.
-A board of the same width, but approximately twice as long (8.43 inches) was referred to an an '''extended length''' board; many later M-series FLIP CHIPs used this format. A board of the short length, but twice as wide (5.187 inches) was referred to as a '''double height'''  board; boards of this size are not common, but do exist.
+A board of the same width, but approximately twice as long (8.43 inches) was referred to an '''extended length''' board; many later M-series FLIP CHIPs used this format. A board of the short length, but twice as wide (5.187 inches) was referred to as a '''double height''' board; boards of this size are not common, but do exist.
 (The 'height' does not refer to the distance from the edge with the handles, to the edge with the contacts, but rather to the distance from one side edge to the other; this is because these board were usually mounted vertically, with the side edges on the top and bottom.)
@@ Line 22: / Line 22: @@
 ==External links==
-* [http://www.douglas.com/ Douglas  Electronics] still sells DEC extender cards
+* [http://www.douglas.com/ Douglas Electronics] still sells DEC extender cards
 ** [http://www.douglas.com/index.php/6-de-11.html DE-11 dual extender]
 ** [http://www.douglas.com/index.php/6-de-8.html DE-8 quad extender]
 [[Category: DEC Hardware]]

@@ Line 19: / Line 19: @@
 * [[DEC edge connector contact identification]]
 * [[FLIP CHIP]]
 [[Category: DEC Hardware]]

← Older revision		Revision as of 21:13, 17 October 2021
Line 18:		Line 18:

	* [[DEC edge connector contact identification]]		* [[DEC edge connector contact identification]]
		+	* [[FLIP CHIP]]

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

← Older revision		Revision as of 03:07, 16 October 2021
Line 10:		Line 10:

	Finally, as production processes improved, and leading signals from board to board became undesirable, even longer hex boards were introduced; these first appeared in the [[VAX-11/780]], and were called '''super hex''' boards within DEC.		Finally, as production processes improved, and leading signals from board to board became undesirable, even longer hex boards were introduced; these first appeared in the [[VAX-11/780]], and were called '''super hex''' boards within DEC.
		+
		+	==Specifications==
		+
		+	The mechanical specifications for single, dual and quad-height FLIP CHIP boards can be found in the [http://www.bitsavers.org/pdf/dec/handbooks/Digital_Logic_Handbook_1975-76.pdf Digital Logic Handbook 1975-76], p. 6-10.

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

@@ Line 7: / Line 7: @@
 (The 'height' does not refer to the distance from the edge with the handles, to the edge with the contacts, but rather to the distance from one side edge to the other; this is because these board were usually mounted vertically, with the side edges on the top and bottom.)
-Extended length boards came in multiples of two, four (10.457 inches) and six times the width of the small original board; these are usually called '''dual''', '''quad''' and '''hex''' height format boards.
+Extended length boards later came in multiples of two, four (10.457 inches) and six times the width of the small original board; these are usually called '''dual''', '''quad''' and '''hex''' height format boards.
 Finally, as production processes improved, and leading signals from board to board became undesirable, even longer hex boards were introduced; these first appeared in the [[VAX-11/780]], and were called '''super hex''' boards within DEC.

← Older revision		Revision as of 21:12, 22 November 2019
Line 1:		Line 1:
−	Many different [[DEC]] computers (e.g. [[PDP-8]], [[PDP-10]], [[PDP-11]]) used a standard set of board sizes, in part because they all used [[FLIP CHIP]]s.	+	Many different [[DEC]] computers (e.g. [[PDP-8 family\|PDP-8]], [[PDP-10]], [[PDP-11]]) used a standard set of board sizes, in part because they all used [[FLIP CHIP]]s.

	The original small '''standard length''' FLIP CHIPs (used in the PDP-8 and [[KA10]] PDP-10 processor) had a total board size of 4.93 inches (from the far end of the edge connector contacts, to the handle end of the board) by 2.437 inches (from one side to the other). From this basic size, a large array of other sizes was built up.		The original small '''standard length''' FLIP CHIPs (used in the PDP-8 and [[KA10]] PDP-10 processor) had a total board size of 4.93 inches (from the far end of the edge connector contacts, to the handle end of the board) by 2.437 inches (from one side to the other). From this basic size, a large array of other sizes was built up.

← Older revision		Revision as of 04:04, 16 December 2018
Line 14:		Line 14:

	* [[DEC edge connector contact identification]]		* [[DEC edge connector contact identification]]
		+
		+	[[Category: DEC Hardware]]

← Older revision		Revision as of 21:42, 3 January 2018
Line 10:		Line 10:

	Finally, as production processes improved, and leading signals from board to board became undesirable, even longer hex boards were introduced; these first appeared in the [[VAX-11/780]], and were called '''super hex''' boards within DEC.		Finally, as production processes improved, and leading signals from board to board became undesirable, even longer hex boards were introduced; these first appeared in the [[VAX-11/780]], and were called '''super hex''' boards within DEC.
		+
		+	==See also==
		+
		+	* [[DEC edge connector contact identification]]