Difference between revisions of "Sanders Associates 720"
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| discontinued_year = | | discontinued_year = | ||
| discontinued_month = | | discontinued_month = | ||
| − | | interface = | + | | interface = RS-232 |
| − | | interface2 = | + | | interface2 = 20 mA current loop |
| interface3 = | | interface3 = | ||
| interface4 = | | interface4 = | ||
| interface5 = | | interface5 = | ||
| − | | baud_rates = | + | | baud_rates = 110-2400 |
| − | | display_size = | + | | display_size = 12-inch |
| − | | phosphor = | + | | phosphor = P31 |
| phosphor2 = | | phosphor2 = | ||
| phosphor3 = | | phosphor3 = | ||
| refresh_rate = | | refresh_rate = | ||
| refresh_rate2 = | | refresh_rate2 = | ||
| − | | char_resolution = | + | | char_resolution = 80 x 24 characters |
| char_resolution2 = | | char_resolution2 = | ||
| char_resolution3 = | | char_resolution3 = | ||
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| char_resolution10 = | | char_resolution10 = | ||
| status_line = | | status_line = | ||
| − | | char_matrix = | + | | char_matrix = 5 x 7 dot matrix |
| char_cell = | | char_cell = | ||
| − | | graphic_type = | + | | graphic_type = monochrome |
| graphic_resolution = | | graphic_resolution = | ||
| cpu = | | cpu = | ||
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}} | }} | ||
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| + | The '''Sanders 720 Data Display System''' was a solid-state, | ||
| + | alphanumeric cathode-ray tube terminal introduced in March 1967 by | ||
| + | Sanders Associates.<ref name="techdesc">{{cite web | ||
| + | |title=Sanders 720 Data Display System A Technical Description | ||
| + | |url=https://bitsavers.org/pdf/sanders/720/Sanders_720_Data_Display_System_Technical_Description_Mar67.pdf | ||
| + | |publisher=Sanders Associates | ||
| + | |date=March 1967 | ||
| + | |accessdate=1 March 2026 | ||
| + | }}</ref> It formed part of the company's 600-series data communications | ||
| + | equipment and was intended for interactive access to time-sharing, | ||
| + | message switching, and data processing systems.<ref | ||
| + | name="systemsbrochure">{{cite web | ||
| + | |title=620-720 Data Communications Systems | ||
| + | |url=https://bitsavers.org/pdf/sanders/620_720/620-720_Data_Communications_Systems_Nov68.pdf | ||
| + | |publisher=Sanders Associates | ||
| + | |date=November 1968 | ||
| + | |accessdate=1 March 2026 | ||
| + | }}</ref> | ||
| + | |||
| + | The 720 was positioned as a higher-speed alternative to | ||
| + | electromechanical teleprinters, providing immediate visual display of | ||
| + | transmitted and received data. Product literature emphasized its | ||
| + | suitability for banking, airline reservations, industrial control, and | ||
| + | military information systems.<ref | ||
| + | name="productdesc">{{cite web | ||
| + | |title=Sanders 720 Data Display System A Product Description | ||
| + | |url=https://bitsavers.org/pdf/sanders/720/Sanders_720_Data_Display_System_Product_Description_May69.pdf | ||
| + | |publisher=Sanders Associates | ||
| + | |date=May 1969 | ||
| + | |accessdate=1 March 2026 | ||
| + | }}</ref> | ||
| + | |||
| + | ==Architecture and display== | ||
| + | |||
| + | The 720 employed a 12-inch CRT using P31 phosphor and displayed up to | ||
| + | 80 characters per line across 24 lines of text.<ref name="techdesc" /> | ||
| + | Characters were formed from a 5 x 7 dot matrix stored in read-only | ||
| + | memory and regenerated continuously from a recirculating memory | ||
| + | synchronized with the raster scan.<ref name="techdesc" /> | ||
| + | |||
| + | The display electronics were fully transistorized and implemented on | ||
| + | modular plug-in circuit cards to simplify field servicing.<ref | ||
| + | name="techdesc" /> Character codes received from the communications | ||
| + | interface were written into the display memory, decoded into dot | ||
| + | patterns, and serialized for presentation in synchronism with horizontal | ||
| + | and vertical deflection signals.<ref name="techdesc" /> | ||
| + | |||
| + | ==Communications== | ||
| + | |||
| + | The 720 supported asynchronous serial transmission using either 20 mA | ||
| + | current loop or EIA RS-232 electrical interfaces.<ref | ||
| + | name="systemsbrochure" /> Standard data rates ranged from 110 to | ||
| + | 2400 bits per second, depending on configuration and associated modem | ||
| + | equipment.<ref name="systemsbrochure" /> | ||
| + | |||
| + | Keyboard input provided a full alphanumeric character set together with | ||
| + | control functions appropriate to contemporary time-sharing systems. | ||
| + | Optional features included parity generation and checking and selectable | ||
| + | character formats to accommodate differing host system | ||
| + | requirements.<ref name="productdesc" /> | ||
| + | |||
| + | ==System integration== | ||
| + | |||
| + | Sanders marketed the 720 in conjunction with the related 620 system and | ||
| + | other communications components, offering integrated configurations in | ||
| + | which multiple display stations could be connected to a central | ||
| + | processor through concentrators or communications | ||
| + | controllers.<ref name="systemsbrochure" /> The November 1968 brochure | ||
| + | described the 620-720 family as modular building blocks for distributed | ||
| + | data communications installations.<ref | ||
| + | name="systemsbrochure" /> | ||
==[[Manx]]== | ==[[Manx]]== | ||
| + | |||
* {{manx details|105,21492|Sanders 720 Data Display System A Technical Description}}, March, 1967 | * {{manx details|105,21492|Sanders 720 Data Display System A Technical Description}}, March, 1967 | ||
* {{manx details|105,21493|Sanders 720 Data Display System A Product Description}}, May, 1969 | * {{manx details|105,21493|Sanders 720 Data Display System A Product Description}}, May, 1969 | ||
* {{manx details|105,21495|620-720 Data Communications Systems}}, November, 1968 | * {{manx details|105,21495|620-720 Data Communications Systems}}, November, 1968 | ||
| + | |||
| + | {{References}} | ||
[[Category:Sanders Associates|720]] | [[Category:Sanders Associates|720]] | ||
[[Category:CRT]] | [[Category:CRT]] | ||
[[Category:1967]] | [[Category:1967]] | ||
| − | |||
Latest revision as of 03:46, 2 March 2026
| Sanders Associates 720 | |
|---|---|
| Manufacturer | Sanders Associates |
| Model | 720 |
| Lifetime | |
| Introduced | March, 1967 |
| Communication | |
| Interfaces |
RS-232, 20 mA current loop |
| Baud Rates | 110-2400 |
| Display | |
| Size | 12-inch |
| Phosphor | P31 |
| Character Modes | |
| Resolution | 80 x 24 characters |
| Matrix | 5 x 7 dot matrix |
| Graphic Modes | |
| Type | Monochrome |
The Sanders 720 Data Display System was a solid-state, alphanumeric cathode-ray tube terminal introduced in March 1967 by Sanders Associates.[1] It formed part of the company's 600-series data communications equipment and was intended for interactive access to time-sharing, message switching, and data processing systems.[2]
The 720 was positioned as a higher-speed alternative to electromechanical teleprinters, providing immediate visual display of transmitted and received data. Product literature emphasized its suitability for banking, airline reservations, industrial control, and military information systems.[3]
Architecture and display
The 720 employed a 12-inch CRT using P31 phosphor and displayed up to 80 characters per line across 24 lines of text.[1] Characters were formed from a 5 x 7 dot matrix stored in read-only memory and regenerated continuously from a recirculating memory synchronized with the raster scan.[1]
The display electronics were fully transistorized and implemented on modular plug-in circuit cards to simplify field servicing.[1] Character codes received from the communications interface were written into the display memory, decoded into dot patterns, and serialized for presentation in synchronism with horizontal and vertical deflection signals.[1]
Communications
The 720 supported asynchronous serial transmission using either 20 mA current loop or EIA RS-232 electrical interfaces.[2] Standard data rates ranged from 110 to 2400 bits per second, depending on configuration and associated modem equipment.[2]
Keyboard input provided a full alphanumeric character set together with control functions appropriate to contemporary time-sharing systems. Optional features included parity generation and checking and selectable character formats to accommodate differing host system requirements.[3]
System integration
Sanders marketed the 720 in conjunction with the related 620 system and other communications components, offering integrated configurations in which multiple display stations could be connected to a central processor through concentrators or communications controllers.[2] The November 1968 brochure described the 620-720 family as modular building blocks for distributed data communications installations.[2]
Manx
- Sanders 720 Data Display System A Technical Description, March, 1967
- Sanders 720 Data Display System A Product Description, May, 1969
- 620-720 Data Communications Systems, November, 1968
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "Sanders 720 Data Display System A Technical Description". Sanders Associates. March 1967. https://bitsavers.org/pdf/sanders/720/Sanders_720_Data_Display_System_Technical_Description_Mar67.pdf. Retrieved 1 March 2026.
- ↑ 2.0 2.1 2.2 2.3 2.4 "620-720 Data Communications Systems". Sanders Associates. November 1968. https://bitsavers.org/pdf/sanders/620_720/620-720_Data_Communications_Systems_Nov68.pdf. Retrieved 1 March 2026.
- ↑ 3.0 3.1 "Sanders 720 Data Display System A Product Description". Sanders Associates. May 1969. https://bitsavers.org/pdf/sanders/720/Sanders_720_Data_Display_System_Product_Description_May69.pdf. Retrieved 1 March 2026.
