KE11-E Extended Instruction Set - Revision history

Ashlin4010: Added Note on ECO

2025-12-24T08:07:17Z

Added Note on ECO

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2022-10-12T00:33:27Z

Better cat

Jnc: +manual, eng drwngs

2021-11-19T16:59:07Z

+manual, eng drwngs

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2021-03-12T20:44:59Z

flat cable type

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2019-09-19T01:30:25Z

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2018-12-16T14:05:19Z

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2018-05-08T04:07:04Z

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The '''KE11-E Extended Instruction Set''' is the optional [[PDP-11 Extended Instruction Set]] for the [[KD11-A CPU]] of the [[PDP-11/40]]; it implements multiply, divide, and multi-bit shift instructions. It is also used by the [[KE11-F Floating Instruction Set]] option.

Physically, it consists of a single [[DEC card form factor|hex]] board, the M7238, which plugs into a pre-wired slot in the [[Central Processing Unit|CPU]] [[backplane]], and also connects up to the basic CPU through three [[over the back]] 40-[[conductor]] [[flat cable]]s.

The KE11-E includes its own [[microcode]] [[Read-only memory|ROM]], which produces an additional 24 bits width of microcode (to control the [[data path]]s and [[register]]s on the M7238), but also provides 44 bits of microcode to control registers and datapaths in the basic CPU. (The CPU's microcode is 56 bits wide; the other 12 bits are unused by the KE11-E, and are sent as 0's to the CPU.)

==Further reading==

* "KE11-E and KE11-F Instruction Set Options Manual", EK-KE11E-TM-002

← Older revision		Revision as of 08:07, 24 December 2025
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	The KE11-E includes its own microcode [[Read-only memory\|ROM]], which produces an additional 24 bits width of microcode (to control the [[data path]]s and [[register]]s on the M7238), but also provides 44 bits of microcode to control registers and datapaths in the basic CPU. (The CPU's microcode is 56 bits wide; the other 12 bits are unused by the KE11-E, and are sent as 0's to the CPU.)		The KE11-E includes its own microcode [[Read-only memory\|ROM]], which produces an additional 24 bits width of microcode (to control the [[data path]]s and [[register]]s on the M7238), but also provides 44 bits of microcode to control registers and datapaths in the basic CPU. (The CPU's microcode is 56 bits wide; the other 12 bits are unused by the KE11-E, and are sent as 0's to the CPU.)
		+
		+	==ECO M7238-0004==
		+
		+	The diagnostics module CKBI includes a test specifically to check for ECO M7238-0004, it has this to say on the matter:
		+	<pre>
		+	9.0 PROGRAM DESCRIPTION
		+
		+	THIS IS A TEST OF THE ASH INSTRUCTION. IT TESTS ASH
		+	WITH DIFFERENT SHIFT COUNTS IN ALL THE REGISTERS.
		+
		+	9.1 NOTE: THE LAST ROUTINE IN THIS DIAGNOSTIC IS DESIGNED TO
		+	VERIFY THAT ECO M7238-0004/FCO M7238-0004 (11/40 ONLY)
		+	HAS BEEN IMPLEMENTED AND IS FUNCTIONING PROPERLY. THIS ECO/FCO
		+	AFFECTS THE 11/40 EIS (M7238) OPTION ONLY. THUS, ALL 11/40'S
		+	MUST PASS THIS ROUTINE. ALSO, THE ECO HAS BEEN PHASED INTO
		+	PRODUCTION SO ALL 11/40'S WITH THE M7238 MODULE MUST PASS THE
		+	ROUTINE IN MANUFACTURING.
		+	FIELD SERVICE - ALL M7238 MODULES INCORPORATING THIS ECO OR FCO
		+	WILL HAVE CS REVISION E OR ABOVE AND MUST PASS THIS ROUTINE.
		+	ANY M7238 MODULE BELOW THIS CS REVISION LEVEL WILL FAIL THE
		+	ROUTINE. THIS IS ACCEPTABLE ONLY IF THE CUSTOMER SOFTWARE
		+	DOES NOT MAKE USE OF THE DECREMENTED OPERAND RESULTING FROM
		+	THE EXECUTION OF AN EXTENDED INSTRUCTION (ASH, ASHC, MUL OR DIV)
		+	USING DESTINATION MODE FIVE. IF THE CUSTOMER SOFTWARE DOES
		+	MAKE USE OF THIS DECREMENTED OPERAND THEN FCO M7238-0004
		+	(CS REV. E) MUST BE INCORPORATED AND THE LAST ROUTINE IN THE
		+	DIAGNOSTIC MUST PASS. IF THE FIELD SERVICE TECHNICIAN HAS
		+	DETERMINED FROM THE ABOVE CRITERIA THAT A PARTICULAR M7238
		+	MODULE IS NOT REQUIRED TO PASS THE LAST ROUTINE, THEN HE
		+	MAY INSERT THE APPROPRIATE CODE TO JUMP FROM THE 'SCOPE'
		+	INSTRUCTION TO 'ENDPAS', THUS BYPASSING THE ROUTINE. SEE
		+	THE ECO OR FCO FOR MORE INFORMATION.
		+	</pre>
		+	No known copies of the ECO exist.

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

← Older revision		Revision as of 00:33, 12 October 2022
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	* [http://www.bitsavers.org/pdf/dec/pdp11/1140/KE11-E_Engineering_Drawings.pdf KE11-E extended instruction set (EIS) option engineering drawings] <!-- also https://manx-docs.org/collections/hcps/KE11-EIS.pdf -->		* [http://www.bitsavers.org/pdf/dec/pdp11/1140/KE11-E_Engineering_Drawings.pdf KE11-E extended instruction set (EIS) option engineering drawings] <!-- also https://manx-docs.org/collections/hcps/KE11-EIS.pdf -->

−	[[Category: PDP-11 Processors]]	+	[[Category: PDP-11 UNIBUS Processors]]

@@ Line 7: / Line 7: @@
 The KE11-E includes its own microcode [[Read-only memory|ROM]], which produces an additional 24 bits width of microcode (to control the [[data path]]s and [[register]]s on the M7238), but also provides 44 bits of microcode to control registers and datapaths in the basic CPU. (The CPU's microcode is 56 bits wide; the other 12 bits are unused by the KE11-E, and are sent as 0's to the CPU.)
-==Further reading==
+==External links==
-* "KE11-E and KE11-F Instruction Set Options Manual", EK-KE11E-TM-002
+* [http://www.bitsavers.org/pdf/dec/pdp11/1140/KE11_RefMan.pdf KE11-E and KE11-F instruction set options user's manual] (EK-KE11E-OP-001) <!-- also http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/EK-KE11E-OP-001%20KE11-E%20and%20KE11-F%20Instruction%20Set%20Options%20User's%20Manual.pdf -->
 [[Category: PDP-11 Processors]]

@@ Line 3: / Line 3: @@
 The '''KE11-E Extended Instruction Set''' is the optional [[PDP-11 Extended Instruction Set]] for the [[KD11-A CPU]] of the [[PDP-11/40]]; it implements multiply, divide, and multi-bit shift instructions. It is also used by the [[KE11-F Floating Instruction Set]] option.
-Physically, it consists of a single [[DEC card form factor|hex]] board, the M7238, which plugs into a pre-wired slot in the [[Central Processing Unit|CPU]] [[backplane]], and also connects up to the basic CPU's [[microcode]] [[bus]] through three [[over the back]] 40-[[conductor]] [[flat cable]]s which plug into [[Berg connector]]s on the M7232 μWord card of the KD11-A.
+Physically, it consists of a single [[DEC card form factor|hex]] board, the M7238, which plugs into a pre-wired slot in the [[Central Processing Unit|CPU]] [[backplane]], and also connects up to the basic CPU's [[microcode]] [[bus]] through three [[over the back]] BC08-R 40-[[conductor]] [[flat cable]]s which plug into [[Berg connector]]s on the M7232 μWord card of the KD11-A.
 The KE11-E includes its own microcode [[Read-only memory|ROM]], which produces an additional 24 bits width of microcode (to control the [[data path]]s and [[register]]s on the M7238), but also provides 44 bits of microcode to control registers and datapaths in the basic CPU. (The CPU's microcode is 56 bits wide; the other 12 bits are unused by the KE11-E, and are sent as 0's to the CPU.)

← Older revision		Revision as of 14:05, 16 December 2018
Line 8:		Line 8:

	* "KE11-E and KE11-F Instruction Set Options Manual", EK-KE11E-TM-002		* "KE11-E and KE11-F Instruction Set Options Manual", EK-KE11E-TM-002
		+
		+	[[Category: PDP-11 Processors]]