KE11-A Extended Arithmetic Element - Revision history

Jnc: /* Further reading */ +KE11-A Technical Manual

2023-07-02T19:17:00Z

‎Further reading: +KE11-A Technical Manual

Jnc: rm bloat

2023-07-02T19:13:04Z

rm bloat

Jnc: /* External links */ +coverage in the pdp11/20 processor handbook

2023-04-04T00:26:02Z

‎External links: +coverage in the pdp11/20 processor handbook

Jnc: /* See also */ +KE11-B

2022-12-05T16:17:43Z

‎See also: +KE11-B

Jnc: /* External links */ +cat

2022-12-05T16:15:50Z

‎External links: +cat

Jnc: +External links (manual, eng drws); details on KM11 use

2021-10-18T22:31:48Z

+External links (manual, eng drws); details on KM11 use

Jnc: link new page

2021-05-05T12:32:29Z

link new page

Jnc: /* Registers */ oops, swapped

2020-06-11T19:04:46Z

‎Registers: oops, swapped

Jnc: /* Registers */ shifts both are 32-bit

2020-06-11T15:56:45Z

‎Registers: shifts both are 32-bit

Jnc: /* Registers */ SC r/o as a byte

2020-06-11T15:47:32Z

‎Registers: SC r/o as a byte

← Older revision		Revision as of 19:17, 2 July 2023
Line 89:		Line 89:

	* ''KE11-A User's Guide'' (EK-KE11A-OP ?)		* ''KE11-A User's Guide'' (EK-KE11A-OP ?)
		+	* ''KE11-A Technical Manual'' (EK-KE11A-TM ?)

	==External links==		==External links==

@@ Line 95: / Line 95: @@
 * [http://bitsavers.org/pdf/dec/pdp11/1120/KE11-A_ExtendedArithElem.pdf KE11-A extended arithmetic element] (DEC-11-HKEA-D)
 * [http://www.bitsavers.org/pdf/dec/unibus/KE11-A__Extended_Arithmetic_Element_Engineering_Drawings__Nov71.pdf KE11-A extended arithmetic element engineering drawings]
 [[Category: PDP-11s]]
 [[Category: UNIBUS]]

@@ Line 92: / Line 92: @@
 ==External links==
 * [http://bitsavers.org/pdf/dec/pdp11/1120/KE11-A_ExtendedArithElem.pdf KE11-A extended arithmetic element] (DEC-11-HKEA-D)
 * [http://www.bitsavers.org/pdf/dec/unibus/KE11-A__Extended_Arithmetic_Element_Engineering_Drawings__Nov71.pdf KE11-A extended arithmetic element engineering drawings]

← Older revision		Revision as of 16:17, 5 December 2022
Line 83:		Line 83:

	==See also==		==See also==
		+
		+	* [[KE11-B Extended Arithmetic Element]]
		+
		+	==Further reading==

	* ''KE11-A User's Guide'' (EK-KE11A-OP ?)		* ''KE11-A User's Guide'' (EK-KE11A-OP ?)

← Older revision		Revision as of 16:15, 5 December 2022
Line 94:		Line 94:

	[[Category: PDP-11s]]		[[Category: PDP-11s]]
		+	[[Category: UNIBUS]]

@@ Line 14: / Line 14: @@
 The KE11-A was originally produced for use with the [[PDP-11/20]], whose [[KA11 CPU]] did not have multiply, divide, or multi-bit shift operations. As a UNIBUS peripheral, not integrated into the [[Central Processing Unit|CPU]], it was also usable with other models, e.g. the [[PDP-11/05]] and [[PDP-11/04]], which likewise did not implement multiplication in [[hardware]], etc.
-The KE11-A can be operated with an optional [[KM11-A Maintenance Set]] in order to diagnose faults.
+The KE11-A can be operated with an optional [[KM11-A Maintenance Set]] (plugged into [[DEC edge connector contact identification|slot B02]]) in order to diagnose faults.
 It was replaced by the [[KE11-B Extended Arithmetic Element]], a [[program compatible]] re-implementation on a single hex card.
@@ Line 81: / Line 81: @@
 | 4 || colspan="2" style="text-align:center;" | UNIBUS Out || colspan="4" style="text-align:center;" | M827 Clock & States
 |}
 {{PDP-11s}}
 [[Category: PDP-11s]]

@@ Line 1: / Line 1: @@
-The '''KE11-A Extended Arithmetic Element''' is an autonomous [[UNIBUS]] [[peripheral]] which can perform a variety of arithmetic or logical [[operator|operations]]:
+The '''KE11-A Extended Arithmetic Element''' is an [[Extended Arithmetic Element]] implemented as autonomous [[UNIBUS]] [[peripheral]]; it can perform a variety of arithmetic or logical [[operator|operations]]:
 * multiplication
@@ Line 10: / Line 10: @@
 (The last is used for implementation of [[floating point]] in [[software]].)
-It is implemented as several [[DEC card form factor|quad]] and dual [[printed circuit board|boards]], plugged into a custom four-slot [[system unit]] (details below).
+It is implemented as several [[DEC card form factor|quad]] and dual [[printed circuit board|boards]], plugged into a custom four-slot [[system unit]] [[backplane]] (details below).
 The KE11-A was originally produced for use with the [[PDP-11/20]], whose [[KA11 CPU]] did not have multiply, divide, or multi-bit shift operations. As a UNIBUS peripheral, not integrated into the [[Central Processing Unit|CPU]], it was also usable with other models, e.g. the [[PDP-11/05]] and [[PDP-11/04]], which likewise did not implement multiplication in [[hardware]], etc.
@@ Line 62: / Line 62: @@
 * M827 Clock and States
-and a pair of M234 Register dual-height boards, plugged into the quad custom [[backplane]].
+and a pair of M234 Register dual-height boards, plugged into the quad custom backplane.
 ===Board locations===

@@ Line 25: / Line 25: @@
 ! Register !! Abbreviation !! Address || Size
 |-
-|'''Multiply''' || '''MUL''' || 777310 || W
+|'''Divide''' || '''DIV''' || 777300 || W
 |-
 |Accumulator || AC || 777302 || W
@@ Line 31: / Line 31: @@
 |Multiplier-Quotient || MQ ||777304 || W
 |-
-|'''Divide''' || '''DIV''' || 777306 || W
+|'''Multiply''' || '''MUL''' || 777306 || W
 |-
 |''Step Counter''$ || ''SC'' || 777310 || B

@@ Line 47: / Line 47: @@
 % The SR is read-only as an individual byte, but can written as a word together with the SC.
-Division takes as one [[operand]] a 32-[[bit]] value held in the AC (high order) and MQ (low order); a remainder is left in the AC. Multiplication produces a 32-bit product in the AC (high order) and MQ (low order).
+Division takes as one [[operand]] a 32-[[bit]] value held in the AC (high order) and MQ (low order); a remainder is left in the AC. Multiplication produces a 32-bit product in the AC (high order) and MQ (low order). Both arithmetic and logical shifts operate on a 32-bit value held in the AC (high order) and MQ (low order).
 ===Status Register (SR)===

@@ Line 33: / Line 33: @@
 |'''Divide''' || '''DIV''' || 777306 || W
 |-
-|Step Counter || SC || 777310 || B
+|''Step Counter''$ || ''SC'' || 777310 || B
 |-
 |''Status Register''% || ''SR'' || 777311 || B
@@ Line 43: / Line 43: @@
 |'''Arithmetic Shift''' || '''ASH''' || 777316 || W
 |}
 Division takes as one [[operand]] a 32-[[bit]] value held in the AC (high order) and MQ (low order); a remainder is left in the AC. Multiplication produces a 32-bit product in the AC (high order) and MQ (low order).
 ===Status Register (SR)===