Teletype - Revision history

Jnc: /* External links */ trim URL's

2025-04-22T17:47:40Z

‎External links: trim URL's

Jnc: /* External links */ +two from Paul Allen's collection at the LCM

2025-04-22T11:42:25Z

‎External links: +two from Paul Allen's collection at the LCM

Jnc: Add image

2018-12-18T02:46:05Z

Add image

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2018-10-21T18:13:38Z

Proper cat

Jnc: Add link to lubricants page

2018-08-10T13:22:22Z

Add link to lubricants page

Jnc: sub-cat

2018-06-07T23:26:03Z

sub-cat

Jnc: Tweaks for popularity

2018-04-25T19:39:21Z

Tweaks for popularity

Jnc: Copyedit; as few more bits

2018-04-25T18:40:37Z

Copyedit; as few more bits

Jnc: A start...

2018-04-25T13:03:59Z

A start...

New page

'''Teletype''' is the name for the mechanical printing [[terminal]]s for connection to an [[asynchronous serial line]] produced by the Teletype Corporation.

Many different models were produced over the years, but the one most commonly used with computers was the Model 33 - initially produced in the mid-60's, it used the [[ASCII]] code (uppercase only), operated at 10 characters per second, and used a cylindrical typewheel to print.

The Model 33 came in three different varieties:

* ASR (Automatic Send/Receive) - in addition to the keyboards and printer, it included a [[paper tape]] reader/punch on the side
* KSR (Keyboard Send/Receive) - as above, but no paper tape reader/punch
* RO (Receive Only) - only the printer

The ASR-33 (formally the "Model 33 ASR") was widely used on early [[minicomputer]]s, as the paper tape option could be used to load [[binary]] program tapes. Although an [[EIA RS-232 serial line interface|EIA]] interface option was available, most used the [[20mA current loop serial line interface|20mA current loop]] interface.

The later Model 38 added lower case, a number of special symbols, and a two-colour (red/black) printing ribbon.

{{stub}}

[[Category:Terminals]]

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 ==External links==
-* [https://onlineonly.christies.com/s/firsts-history-computing-paul-g-allen-collection/teletype-asr-33-110/230048?ldp_breadcrumb=back Teletype ASR 33] - a Model 33 from [[Paul Allen]]'s collection at the [[Living Computer Museum|LCM]], includes several images
+* [https://onlineonly.christies.com/s/firsts-history-computing-paul-g-allen-collection/teletype-asr-33-110/230048 Teletype ASR 33] - a Model 33 from [[Paul Allen]]'s collection at the [[Living Computer Museum|LCM]], includes several images
-* [https://onlineonly.christies.com/s/firsts-history-computing-paul-g-allen-collection/teletype-asr-35-130/230068?ldp_breadcrumb=back Teletype ASR 35] - a Model 35 from the same collection, also includes several images
+* [https://onlineonly.christies.com/s/firsts-history-computing-paul-g-allen-collection/teletype-asr-35-130/230068 Teletype ASR 35] - a Model 35 from the same collection, also includes several images
 * [http://homepage.cs.uiowa.edu/~jones/pdp8/UI-8/ks7470oil.shtml About KS7470 oil and KS7471 grease] - Modern equivalents for Teletype lubricants
 [[Category: Printing Terminals]]

@@ Line 1: / Line 1: @@
-'''Teletype''' is the name for the mechanical [[printing terminal]]s for connection to an [[asynchronous serial line]] produced by the Teletype Corporation.
+'''Teletype''' is the commonly-used name for the mechanical [[printing terminal]]s for connection to an [[asynchronous serial line]] produced by the Teletype Corporation.
 [[Image:asr33.jpg|200px|right|An ASR33]]
@@ Line 18: / Line 18: @@
 The later Models 37 (15 cps) and 38 (10 cps) added lower case, a number of special symbols, and a two-colour (red/black) printing ribbon; they too were available in ASR, KSR and RO variants.
 ==External links==
 * [http://homepage.cs.uiowa.edu/~jones/pdp8/UI-8/ks7470oil.shtml About KS7470 oil and KS7471 grease] - Modern equivalents for Teletype lubricants
-{{semi-stub}}
+[[Category: Printing Terminals]]

← Older revision		Revision as of 02:46, 18 December 2018
Line 1:		Line 1:
	'''Teletype''' is the name for the mechanical [[printing terminal]]s for connection to an [[asynchronous serial line]] produced by the Teletype Corporation.		'''Teletype''' is the name for the mechanical [[printing terminal]]s for connection to an [[asynchronous serial line]] produced by the Teletype Corporation.
		+
		+	[[Image:asr33.jpg\|200px\|right\|An ASR33]]

	Many different models were produced over the years, but the one most commonly used with computers was the Model 33, which used the [[ASCII]] code (uppercase only), one of the first to do so.		Many different models were produced over the years, but the one most commonly used with computers was the Model 33, which used the [[ASCII]] code (uppercase only), one of the first to do so.

@@ Line 1: / Line 1: @@
-'''Teletype''' is the name for the mechanical printing [[terminal]]s for connection to an [[asynchronous serial line]] produced by the Teletype Corporation.
+'''Teletype''' is the name for the mechanical [[printing terminal]]s for connection to an [[asynchronous serial line]] produced by the Teletype Corporation.
 Many different models were produced over the years, but the one most commonly used with computers was the Model 33, which used the [[ASCII]] code (uppercase only), one of the first to do so.
 Although an [[EIA RS-232 serial line interface|EIA]] interface option has reportedly been seen, most used the [[20mA current loop serial line interface|20mA current loop]] interface.
@@ Line 20: / Line 21: @@
 * [http://homepage.cs.uiowa.edu/~jones/pdp8/UI-8/ks7470oil.shtml About KS7470 oil and KS7471 grease] - Modern equivalents for Teletype lubricants
-{{stub}}
+{{semi-stub}}
 [[Category:Printing Terminals]]

@@ Line 15: / Line 15: @@
 The later Models 37 (15 cps) and 38 (10 cps) added lower case, a number of special symbols, and a two-colour (red/black) printing ribbon; they too were available in ASR, KSR and RO variants.
 {{stub}}
 [[Category:Printing Terminals]]

← Older revision		Revision as of 23:26, 7 June 2018
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	{{stub}}		{{stub}}

−	[[Category:Terminals]]	+	[[Category:Printing Terminals]]

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 Although an [[EIA RS-232 serial line interface|EIA]] interface option has reportedly been seen, most used the [[20mA current loop serial line interface|20mA current loop]] interface.
-It operated at 10 characters per second, and used a cylindrical typewheel to print. It was initially produced in the mid-60's, but production continued until 1981.
+It operated at 10 characters per second, and used a cylindrical typewheel to print. It was initially produced in the mid-60's, but production continued until 1981; its low cost made it a popular choice.
 The Model 33 came in three different variants:
@@ Line 12: / Line 12: @@
 * RO (Receive Only) - only the printer
-The ASR-33 (formally the "Model 33 ASR") was widely used on early [[minicomputer]]s, as the paper tape option could be used to load [[binary]] program tapes.
+The ASR-33 (formally the "Model 33 ASR") was widely used on early [[minicomputer]]s, in part because the paper tape option could be used to load [[binary]] program tapes.
 The later Models 37 (15 cps) and 38 (10 cps) added lower case, a number of special symbols, and a two-colour (red/black) printing ribbon; they too were available in ASR, KSR and RO variants.