Difference between revisions of "FP780 Floating-Point Accelerator"

Latest revision as of 12:53, 8 July 2022

The FP780 Floating-Point Accelerator was an optional floating point accelerator for the VAX-11/780's KA780 CPU; the floating point instructions were performed by the microcode when it was not installed. It was installed in slots 24 through 28 of the CPU's backplane.

It was implemented on five hex cards:

Slot	Board	Acronym	Function
24	M8285	FNM	Normalization and fraction division
25	M8286	FMH	Fraction multiplication (most significant bits)
26	M8287	FML	Fraction multiplication (least significant bits)
27	M8288	FAD	Fraction addition and subtraction
28	M8289	FCT	Exponent manipulation and FPA control

This article is not as complete coverage of the topic as it could be. You can help by expanding it.

Revision as of 14:18, 3 January 2022 (view source) Jnc (talk \| contribs) m (→‎External links: typo) ← Older edit		Latest revision as of 12:53, 8 July 2022 (view source) Jnc (talk \| contribs) m (+link)
Line 1:		Line 1:
−	The '''FP780 Floating-Point Accelerator''' was an optional [[floating point]] ~~accelerator~~ for the [[VAX-11/780]]'s [[KA780 CPU]]; the floating point [[instruction]]s were performed by the microcode when it was not installed. It was installed in slots 24 through 28 of the [[CPU]]'s [[backplane]].	+	The '''FP780 Floating-Point Accelerator''' was an optional [[floating point accelerator]] for the [[VAX-11/780]]'s [[KA780 CPU]]; the floating point [[instruction]]s were performed by the microcode when it was not installed. It was installed in slots 24 through 28 of the [[CPU]]'s [[backplane]].

	==Implementation==		==Implementation==