SDS 930 - Revision history

Jnc: Move 930 changes details here

2025-09-17T14:15:55Z

Move 930 changes details here

Larsbrinkhoff: 24-bit cat.

2023-07-11T08:00:18Z

24-bit cat.

Jnc: /* External links */ +Modifications to the SDS 930 Computer for the Implementation of Time-Sharing

2023-06-10T14:39:09Z

‎External links: +Modifications to the SDS 930 Computer for the Implementation of Time-Sharing

Jnc: Expand somewhat

2022-05-04T15:39:19Z

Expand somewhat

Larsbrinkhoff: Category: Xerox Mainframes

2022-05-04T13:35:09Z

Category: Xerox Mainframes

Larsbrinkhoff: Links to Bitsavers.

2022-05-04T06:22:58Z

Links to Bitsavers.

New page

{{stub}}

==External links==

* Bitsavers:
** [http://bitsavers.org/pdf/sds/9xx/930/ SDS 930 documents.]
** [http://www.bitsavers.org/bits/SDS/9xx/ SDS 9xx programs.]

@@ Line 3: / Line 3: @@
 The memory was available in bank sizes of 4KW, 8KW and 16KW; the basic system could hold up to two banks, up to a maximum of 32KW. Use of more than 16KW required optional [[bank switching]] hardware. The basic configuration included multiply and divide in [[hardware]], but no [[floating point]] in hardware (although there are [[instruction]]s to support it, such as [[normalization]], etc). <!-- an optional hardware floating point unit, the 'correlation and filtering unit' (CFE) may have been added later - as of Nov 69, fp was in software -->
-A 930 was upgraded with [[memory management]] hardware (including [[virtual memory]]) by [[Project Genie]] at UC Berkeley, to allow it to be used for creating the [[Berkeley Timesharing System]]; that machine was effectively the prototype of the later [[SDS 940]].
+==Upgrade to prototype 940==
 {{semi-stub}}

← Older revision		Revision as of 08:00, 11 July 2023
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	[[Category: Xerox Mainframes]]		[[Category: Xerox Mainframes]]
		+	[[Category: 24-bit Computers]]

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 ** [http://www.bitsavers.org/pdf/sds/9xx/930/900064F_930_RefMan_Nov69.pdf XDS 930 Reference Manual]
 * [http://www.bitsavers.org/bits/SDS/9xx/ SDS 9xx] - programs
 [[Category: Xerox Mainframes]]

@@ Line 1: / Line 1: @@
-{{stub}}
+The '''SDS 930''' (renamed to '''XDS 930''' after [[Scientific Data Systems|SDS]] was purchased by Xerox and renamed 'XDS') was a [[mainframe]] with a 24-bit [[word]] length (with an extra bit for [[parity]]). It was constructed out of [[bipolar]] discrete [[transistor]]s, and used [[core memory]].
 ==External links==
-* Bitsavers:
+* [http://www.bitsavers.org/pdf/sds/9xx/930/ SDS 930] - documentation at Bitsavers
-** [http://bitsavers.org/pdf/sds/9xx/930/ SDS 930 documents.]
+** [http://www.bitsavers.org/pdf/sds/9xx/930/900066C_930_Technical_Manual_Feb66.pdf SDS 930 Technical Manual]
-** [http://www.bitsavers.org/bits/SDS/9xx/ SDS 9xx programs.]
+** [http://www.bitsavers.org/pdf/sds/9xx/930/900064F_930_RefMan_Nov69.pdf XDS 930 Reference Manual]
 [[Category: Xerox Mainframes]]

← Older revision		Revision as of 13:35, 4 May 2022
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	** [http://bitsavers.org/pdf/sds/9xx/930/ SDS 930 documents.]		** [http://bitsavers.org/pdf/sds/9xx/930/ SDS 930 documents.]
	** [http://www.bitsavers.org/bits/SDS/9xx/ SDS 9xx programs.]		** [http://www.bitsavers.org/bits/SDS/9xx/ SDS 9xx programs.]
		+
		+	[[Category: Xerox Mainframes]]