FP11-E Floating Point Processor - Revision history

Jnc: Better cat

2022-10-13T00:19:31Z

Better cat

Jnc: /* Further reading */ +TM

2022-01-11T12:00:47Z

‎Further reading: +TM

Jnc: /* External links */ +FMPS, manual

2022-01-11T11:12:18Z

‎External links: +FMPS, manual

Jnc: link, typo

2020-06-18T01:41:27Z

link, typo

Jnc: Formal board names

2019-03-12T01:50:17Z

Formal board names

Jnc: An OK start

2019-03-02T19:53:12Z

An OK start

New page

The '''FP11-E Floating Point Processor''' is the optional [[hardware]] [[floating point]] unit for the [[KD11-K CPU]] of the [[PDP-11/60]]. The KD11-K provided the full [[FP11 floating point]] using [[microcode]]; the FP11-E was an option which provided considerably improved floating point performance.

It was a 4 [[DEC card form factor|hex]] board [[co-processor]]:

* Next Micro-Address (M7878)
* Exponent (M7879)
* Multiplier Network (M7880)
* Floating ALU (M7881)

which mounted in slots 8-11 of the CPU [[backplane]]. The main CPU can detect the presence of the FP11-E, and, if present, uses it to perform any floating point [[instruction]]s found in the [[program]].

Electrically, it connected directly to the CPU and is controlled bu it; unidirectional data buses are provided to move information (including instructions) from the CPU to the FPP, and vice versa.

The FP11-E has its own microcode, 88 bits wide, to control its operation, and interaction with the main CPU.

{{PDP-11}}

[[Category: PDP-11 Processors]]

← Older revision		Revision as of 00:19, 13 October 2022
Line 23:		Line 23:
	* [http://www.bitsavers.org/pdf/dec/pdp11/1160/MP-00429_FP11-E_Engineering_Drawings_Jun77.pdf FP11-E Field Maintenance Print Set] (MP00429)		* [http://www.bitsavers.org/pdf/dec/pdp11/1160/MP-00429_FP11-E_Engineering_Drawings_Jun77.pdf FP11-E Field Maintenance Print Set] (MP00429)

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

← Older revision		Revision as of 12:00, 11 January 2022
Line 13:		Line 13:

	The FP11-E has its own microcode, 88 bits wide, to control its operation, and interaction with the main CPU.		The FP11-E has its own microcode, 88 bits wide, to control its operation, and interaction with the main CPU.
		+
		+	==Further reading==
		+
		+	* ''FP11-E floating-point processor technical manual'' (EK-FP11E-TM-001)

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

@@ Line 8: / Line 8: @@
 * Floating Point ALU (FALU - M7881)
-which mounted in slots 8-11 of the CPU [[backplane]]. The main CPU can detect the presence of the FP11-E, and, if present, uses it to perform any floating point [[instruction]]s found in the [[program]].
+which mounted in slots 8-11 of the [[Central Processing Unit|CPU]]'s [[backplane]]. The main CPU can detect the presence of the FP11-E, and, if present, uses it to perform any floating point [[instruction]]s found in the [[program]].
-Electrically, it connected directly to the CPU and is controlled bu it; unidirectional data buses are provided to move information (including instructions) from the CPU to the FPP, and vice versa.
+Electrically, it connected directly to the CPU and is controlled by it; unidirectional data buses are provided to move information (including instructions) from the CPU to the FPP, and vice versa.
 The FP11-E has its own microcode, 88 bits wide, to control its operation, and interaction with the main CPU.

@@ Line 14: / Line 14: @@
 The FP11-E has its own microcode, 88 bits wide, to control its operation, and interaction with the main CPU.
-{{PDP-11}}
+==External links==
 [[Category: PDP-11 Processors]]

@@ Line 3: / Line 3: @@
 It was a 4 [[DEC card form factor|hex]] board [[co-processor]]:
-* Next Micro-Address (M7878)
+* Floating Point Next Micro-Address (FNUA - M7878)
-* Exponent (M7879)
+* Floating Point Exponent (FLTEXP - M7879)
-* Multiplier Network (M7880)
+* Multiplying Network (MULNET - M7880)
-* Floating ALU (M7881)
+* Floating Point ALU (FALU - M7881)
 which mounted in slots 8-11 of the CPU [[backplane]]. The main CPU can detect the presence of the FP11-E, and, if present, uses it to perform any floating point [[instruction]]s found in the [[program]].