S-100 - Revision history

Jnc: /* External links */ Canonical format

2026-09-27T13:02:52Z

External links: Canonical format

← Older revision		Revision as of 13:02, 27 September 2026
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	==External links==		==External links==

	* ~~Herb Johnson's S-100 pages at~~ http://www.retrotechnology.com/herbs_stuff/s100bus.html		* [http://www.retrotechnology.com/herbs_stuff/s100bus.html S-100 and IEEE-696 Bus] - Herb Johnson's S-100 pages
	* ~~Detailed pin description at~~ http://www.hardwarebook.info/IEEE-696		* [http://www.hardwarebook.info/IEEE-696 IEEE-696] - detailed pin description

	[[Category: Buses]]		[[Category: Buses]]

Jnc: /* Companies */ No such company as 'Altair'

2026-09-27T13:00:28Z

Companies: No such company as 'Altair'

← Older revision		Revision as of 13:00, 27 September 2026
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	Companies whose products used the S-100 bus included:		Companies whose products used the S-100 bus included:

	* [[~~Altair~~]]		* [[Micro Instrumentation and Telemetry Systems\|MITS]]
	* [[Comart]]		* [[Comart]]

Jnc: typo

2025-04-27T22:29:58Z

typo

← Older revision		Revision as of 22:29, 27 April 2025
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	The '''S-100''' [[bus]] was designed for [[i8080\|8080]] and [[i8085\|8085]] but mainly used in many [[Z80]] systems. Being well defined it allowed many manufacturers to produce boards and cases for it, which made manufacture and expansion of a system very easy. Most used [[CP/M]] as the [[operating system]] on them.		The '''S-100''' [[bus]] was designed for [[i8080\|8080]] and [[i8085\|8085]] but mainly used in many [[Z80]] systems. Being well defined it allowed many manufacturers to produce boards and cases for it, which made manufacture and expansion of a system very easy. Most used [[CP/M]] as the [[operating system]] on them.

	S-100 is short for '''Standard 100''', according to an advertisement by Cromemco on page 2 in the November 1976 issue of BYTE magazine. This was also possibly the first public reference to S-100. Before that it had been known first as the '''Altair bus''', later as the '''Altair/IMSAI bus''' (in the [[IMSAI ~~8800~~]]), but after a third vendor was added to the list the industry (in reality the competitors to those vendors) decided on a generic term so that they wouldn't have to refer to other companies in their own product advertisements. As the bus used 100 pins it was called Standard 100, or S-100.		S-100 is short for '''Standard 100''', according to an advertisement by Cromemco on page 2 in the November 1976 issue of BYTE magazine. This was also possibly the first public reference to S-100. Before that it had been known first as the '''Altair bus''', later as the '''Altair/IMSAI bus''' (in the [[IMSAI 8080]]), but after a third vendor was added to the list the industry (in reality the competitors to those vendors) decided on a generic term so that they wouldn't have to refer to other companies in their own product advertisements. As the bus used 100 pins it was called Standard 100, or S-100.

	A slightly faster and expanded S-100 variant was made into an IEEE standard, IEEE-696, and available as a draft since 1978. First published in non-draft form in the July 1979 issue of COMPUTER Magazine (an IEEE Computer Society publication). It was however not approved by the IEEE 696 committee until late 1982, or early 1983, so the standard is called IEEE-696-1983. IEEE stopped support of the standard in June 1994.		A slightly faster and expanded S-100 variant was made into an IEEE standard, IEEE-696, and available as a draft since 1978. First published in non-draft form in the July 1979 issue of COMPUTER Magazine (an IEEE Computer Society publication). It was however not approved by the IEEE 696 committee until late 1982, or early 1983, so the standard is called IEEE-696-1983. IEEE stopped support of the standard in June 1994.

Jnc: Link to IMSAI 8800

2025-04-27T22:04:41Z

Link to IMSAI 8800

← Older revision		Revision as of 22:04, 27 April 2025
Line 3:		Line 3:
	The '''S-100''' [[bus]] was designed for [[i8080\|8080]] and [[i8085\|8085]] but mainly used in many [[Z80]] systems. Being well defined it allowed many manufacturers to produce boards and cases for it, which made manufacture and expansion of a system very easy. Most used [[CP/M]] as the [[operating system]] on them.		The '''S-100''' [[bus]] was designed for [[i8080\|8080]] and [[i8085\|8085]] but mainly used in many [[Z80]] systems. Being well defined it allowed many manufacturers to produce boards and cases for it, which made manufacture and expansion of a system very easy. Most used [[CP/M]] as the [[operating system]] on them.

	S-100 is short for '''Standard 100''', according to an advertisement by Cromemco on page 2 in the November 1976 issue of BYTE magazine. This was also possibly the first public reference to S-100. Before that it had been known first as the '''Altair bus''', later as the '''Altair/IMSAI bus''', but after a third vendor was added to the list the industry (in reality the competitors to those vendors) decided on a generic term so that they wouldn't have to refer to other companies in their own product advertisements. As the bus used 100 pins it was called Standard 100, or S-100.		S-100 is short for '''Standard 100''', according to an advertisement by Cromemco on page 2 in the November 1976 issue of BYTE magazine. This was also possibly the first public reference to S-100. Before that it had been known first as the '''Altair bus''', later as the '''Altair/IMSAI bus''' (in the [[IMSAI 8800]]), but after a third vendor was added to the list the industry (in reality the competitors to those vendors) decided on a generic term so that they wouldn't have to refer to other companies in their own product advertisements. As the bus used 100 pins it was called Standard 100, or S-100.

	A slightly faster and expanded S-100 variant was made into an IEEE standard, IEEE-696, and available as a draft since 1978. First published in non-draft form in the July 1979 issue of COMPUTER Magazine (an IEEE Computer Society publication). It was however not approved by the IEEE 696 committee until late 1982, or early 1983, so the standard is called IEEE-696-1983. IEEE stopped support of the standard in June 1994.		A slightly faster and expanded S-100 variant was made into an IEEE standard, IEEE-696, and available as a draft since 1978. First published in non-draft form in the July 1979 issue of COMPUTER Magazine (an IEEE Computer Society publication). It was however not approved by the IEEE 696 committee until late 1982, or early 1983, so the standard is called IEEE-696-1983. IEEE stopped support of the standard in June 1994.

Jnc: /* Companies */ Companies whose products used the S-100 bus

2024-02-18T15:28:37Z

Companies: Companies whose products used the S-100 bus

← Older revision		Revision as of 15:28, 18 February 2024
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	* More address pins: A0-A15 vs. A0-A24 (IEEE-696)		* More address pins: A0-A15 vs. A0-A24 (IEEE-696)
	* The original two 8-bit unidirectional data paths could alternatively be used as a single 16-bit data path (IEEE-696)		* The original two 8-bit unidirectional data paths could alternatively be used as a single 16-bit data path (IEEE-696)

			==Companies==

			Companies whose products used the S-100 bus included:

			* [[Altair]]
			* [[Comart]]

	{{semi-stub}}		{{semi-stub}}

Jnc: /* See also */ +SS-50 bus

2024-02-16T14:56:18Z

Jnc: Proper cat

2018-10-21T12:27:44Z

Proper cat

← Older revision		Revision as of 12:27, 21 October 2018
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	* Herb Johnson's S-100 pages at http://www.retrotechnology.com/herbs_stuff/s100bus.html		* Herb Johnson's S-100 pages at http://www.retrotechnology.com/herbs_stuff/s100bus.html
	* Detailed pin description at http://www.hardwarebook.info/IEEE-696		* Detailed pin description at http://www.hardwarebook.info/IEEE-696
	{{stub}}
			{{semi-stub}}

	[[Category:Buses]]		[[Category:Buses]]

Jnc: Update cat, add links

2018-02-19T22:23:54Z

Update cat, add links

← Older revision		Revision as of 22:23, 19 February 2018
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	[[Image:S-100 board.JPG\|150px\|thumb\|right\|S-100 motherboard]]		[[Image:S-100 board.JPG\|150px\|thumb\|right\|S-100 motherboard]]
	The '''S-100''' [[bus]] was designed for [[i8080\|8080]] and [[i8085\|8085]] but mainly used in many [[Z80]] systems. Being well defined it allowed many manufacturers to produce boards and cases for it, which made manufacture and expansion of a system very easy. Most used [[CP/M]] as the operating system on them.
			The '''S-100''' [[bus]] was designed for [[i8080\|8080]] and [[i8085\|8085]] but mainly used in many [[Z80]] systems. Being well defined it allowed many manufacturers to produce boards and cases for it, which made manufacture and expansion of a system very easy. Most used [[CP/M]] as the [[operating system]] on them.

	S-100 is short for '''Standard 100''', according to an advertisement by Cromemco on page 2 in the November 1976 issue of BYTE magazine. This was also possibly the first public reference to S-100. Before that it had been known first as the '''Altair bus''', later as the '''Altair/IMSAI bus''', but after a third vendor was added to the list the industry (in reality the competitors to those vendors) decided on a generic term so that they wouldn't have to refer to other companies in their own product advertisements. As the bus used 100 pins it was called Standard 100, or S-100.		S-100 is short for '''Standard 100''', according to an advertisement by Cromemco on page 2 in the November 1976 issue of BYTE magazine. This was also possibly the first public reference to S-100. Before that it had been known first as the '''Altair bus''', later as the '''Altair/IMSAI bus''', but after a third vendor was added to the list the industry (in reality the competitors to those vendors) decided on a generic term so that they wouldn't have to refer to other companies in their own product advertisements. As the bus used 100 pins it was called Standard 100, or S-100.
Line 16:		Line 17:
	{{stub}}		{{stub}}

	[[Category:~~Bus Architectures~~]]		[[Category:Buses]]

Tor: Fix double 'the the'

2012-11-22T08:49:08Z

Fix double 'the the'

← Older revision		Revision as of 08:49, 22 November 2012
Line 4:		Line 4:
	S-100 is short for '''Standard 100''', according to an advertisement by Cromemco on page 2 in the November 1976 issue of BYTE magazine. This was also possibly the first public reference to S-100. Before that it had been known first as the '''Altair bus''', later as the '''Altair/IMSAI bus''', but after a third vendor was added to the list the industry (in reality the competitors to those vendors) decided on a generic term so that they wouldn't have to refer to other companies in their own product advertisements. As the bus used 100 pins it was called Standard 100, or S-100.		S-100 is short for '''Standard 100''', according to an advertisement by Cromemco on page 2 in the November 1976 issue of BYTE magazine. This was also possibly the first public reference to S-100. Before that it had been known first as the '''Altair bus''', later as the '''Altair/IMSAI bus''', but after a third vendor was added to the list the industry (in reality the competitors to those vendors) decided on a generic term so that they wouldn't have to refer to other companies in their own product advertisements. As the bus used 100 pins it was called Standard 100, or S-100.

	A slightly faster and expanded S-100 variant was made into an IEEE standard, IEEE-696, and available as a draft since 1978. First published in non-draft form in the July 1979 issue of COMPUTER Magazine (an IEEE Computer Society publication). It was however not approved by ~~the~~ the IEEE 696 committee until late 1982, or early 1983, so the standard is called IEEE-696-1983. IEEE stopped support of the standard in June 1994.		A slightly faster and expanded S-100 variant was made into an IEEE standard, IEEE-696, and available as a draft since 1978. First published in non-draft form in the July 1979 issue of COMPUTER Magazine (an IEEE Computer Society publication). It was however not approved by the IEEE 696 committee until late 1982, or early 1983, so the standard is called IEEE-696-1983. IEEE stopped support of the standard in June 1994.

	Some of the noteworthy differences between the original Altair/IMSAI bus and the variant of S-100 that became IEEE-696-1983 are listed below. NB: This is far from complete.		Some of the noteworthy differences between the original Altair/IMSAI bus and the variant of S-100 that became IEEE-696-1983 are listed below. NB: This is far from complete.

Tor: Added some more info

2012-07-08T14:42:41Z

Added some more info

← Older revision		Revision as of 14:42, 8 July 2012
Line 4:		Line 4:
	S-100 is short for '''Standard 100''', according to an advertisement by Cromemco on page 2 in the November 1976 issue of BYTE magazine. This was also possibly the first public reference to S-100. Before that it had been known first as the '''Altair bus''', later as the '''Altair/IMSAI bus''', but after a third vendor was added to the list the industry (in reality the competitors to those vendors) decided on a generic term so that they wouldn't have to refer to other companies in their own product advertisements. As the bus used 100 pins it was called Standard 100, or S-100.		S-100 is short for '''Standard 100''', according to an advertisement by Cromemco on page 2 in the November 1976 issue of BYTE magazine. This was also possibly the first public reference to S-100. Before that it had been known first as the '''Altair bus''', later as the '''Altair/IMSAI bus''', but after a third vendor was added to the list the industry (in reality the competitors to those vendors) decided on a generic term so that they wouldn't have to refer to other companies in their own product advertisements. As the bus used 100 pins it was called Standard 100, or S-100.

	A slightly faster and expanded S-100 variant was made into an IEEE standard in ~~1978~~, IEEE-696.		A slightly faster and expanded S-100 variant was made into an IEEE standard, IEEE-696, and available as a draft since 1978. First published in non-draft form in the July 1979 issue of COMPUTER Magazine (an IEEE Computer Society publication). It was however not approved by the the IEEE 696 committee until late 1982, or early 1983, so the standard is called IEEE-696-1983. IEEE stopped support of the standard in June 1994.

			Some of the noteworthy differences between the original Altair/IMSAI bus and the variant of S-100 that became IEEE-696-1983 are listed below. NB: This is far from complete.
			* Bus speed increased to 10MHz (IEEE-696)
			* More address pins: A0-A15 vs. A0-A24 (IEEE-696)
			* The original two 8-bit unidirectional data paths could alternatively be used as a single 16-bit data path (IEEE-696)

	==References==		==References==
	* Herb Johnson's S-100 pages at http://www.retrotechnology.com/herbs_stuff/s100bus.html		* Herb Johnson's S-100 pages at http://www.retrotechnology.com/herbs_stuff/s100bus.html
			* Detailed pin description at http://www.hardwarebook.info/IEEE-696
	{{stub}}		{{stub}}

	[[Category:Bus Architectures]]		[[Category:Bus Architectures]]

← Older revision		Revision as of 14:56, 16 February 2024
Line 12:		Line 12:
	* The original two 8-bit unidirectional data paths could alternatively be used as a single 16-bit data path (IEEE-696)		* The original two 8-bit unidirectional data paths could alternatively be used as a single 16-bit data path (IEEE-696)

	==~~References~~==		{{semi-stub}}

			==See also==

			* [[SS-50 bus]]

			==External links==

	* Herb Johnson's S-100 pages at http://www.retrotechnology.com/herbs_stuff/s100bus.html		* Herb Johnson's S-100 pages at http://www.retrotechnology.com/herbs_stuff/s100bus.html
	* Detailed pin description at http://www.hardwarebook.info/IEEE-696		* Detailed pin description at http://www.hardwarebook.info/IEEE-696

	~~{{semi-stub}}~~		[[Category: Buses]]

	[[Category:Buses]]