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- ZX_Interface_1 abstract "A peripheral from Sinclair Research for its ZX Spectrum home computer, the ZX Interface 1 was launched in 1983. Originally intended as a local area network interface for use in school classrooms, it was revised before launch to also act as the controller for up to eight ZX Microdrive high-speed tape-loop cartridge drives. It also included a DE-9 RS-232 interface capable of operating at up to 19.2 kbit/s — a rare instance of Sinclair using an industry-standard connector. At hardware level it was mainly a voltage adapter, the serial protocol being implemented in software by bit-banging. This led to problems when receiving data, but not when transmitting.A wedge-shaped device fitting underneath the ZX Spectrum, ZX Interface 1 contained 8 kB of ROM comprising the control software for the Microdrives, RS-232 port and network interface. This extended the error handler in the Sinclair BASIC to allow extra keywords to be used. As this became an official standard, other developers quickly used this mechanism to create language extensions to Sinclair BASIC.Two further revisions of the device's firmware were made following launch. These aimed to improve ZX Microdrive cartridge formatting and access time, printing functions via the RS-232 interface, and other bugs in the firmware held in device's internal 8K ROM. Machine code software which used the officially documented entry points ('hook codes') would experience few incompatibility issues, however programs using non-standard entry points risked incompatibility due to presence of revised entry points.The same protocol, renamed QLAN, was later used on the Sinclair QL. This was intended to be interoperable with ZX Net, but due to timing differences interoperability was found to be problematic.The ZX Interface 1 was incompatible with some of later ZX Spectrum models such as the +2 and +3, due to differences in ROM and expansion connector, therefore wasn't possible to connect and use the Microdrive units.".
- ZX_Interface_1 thumbnail ZX_Inteface1_Microdrive.jpg?width=300.
- ZX_Interface_1 wikiPageExternalLink d6.html.
- ZX_Interface_1 wikiPageExternalLink Interface%201%20scan%20Small.jpg.
- ZX_Interface_1 wikiPageExternalLink tk2.
- ZX_Interface_1 wikiPageExternalLink interface1.htm.
- ZX_Interface_1 wikiPageExternalLink feat7.html.
- ZX_Interface_1 wikiPageID "563544".
- ZX_Interface_1 wikiPageLength "4862".
- ZX_Interface_1 wikiPageOutDegree "29".
- ZX_Interface_1 wikiPageRevisionID "549315888".
- ZX_Interface_1 wikiPageWikiLink 8-N-1.
- ZX_Interface_1 wikiPageWikiLink Bit-banging.
- ZX_Interface_1 wikiPageWikiLink Bit_banging.
- ZX_Interface_1 wikiPageWikiLink Carrier_Sense_Multiple_Access.
- ZX_Interface_1 wikiPageWikiLink Carrier_sense_multiple_access.
- ZX_Interface_1 wikiPageWikiLink Category:1983_introductions.
- ZX_Interface_1 wikiPageWikiLink Category:Home_computer_peripherals.
- ZX_Interface_1 wikiPageWikiLink Category:ZX_Spectrum.
- ZX_Interface_1 wikiPageWikiLink D-subminiature.
- ZX_Interface_1 wikiPageWikiLink DE-9.
- ZX_Interface_1 wikiPageWikiLink Home_computer.
- ZX_Interface_1 wikiPageWikiLink Joystick.
- ZX_Interface_1 wikiPageWikiLink Local_area_network.
- ZX_Interface_1 wikiPageWikiLink Machine_code.
- ZX_Interface_1 wikiPageWikiLink Network_topology.
- ZX_Interface_1 wikiPageWikiLink Peripheral.
- ZX_Interface_1 wikiPageWikiLink ROM_cartridge.
- ZX_Interface_1 wikiPageWikiLink RS-232.
- ZX_Interface_1 wikiPageWikiLink Read-only_memory.
- ZX_Interface_1 wikiPageWikiLink Sinclair_BASIC.
- ZX_Interface_1 wikiPageWikiLink Sinclair_QL.
- ZX_Interface_1 wikiPageWikiLink Sinclair_Research.
- ZX_Interface_1 wikiPageWikiLink Sinclair_Research_Ltd.
- ZX_Interface_1 wikiPageWikiLink ZX8302.
- ZX_Interface_1 wikiPageWikiLink ZX_Interface_2.
- ZX_Interface_1 wikiPageWikiLink ZX_Microdrive.
- ZX_Interface_1 wikiPageWikiLink ZX_Spectrum.
- ZX_Interface_1 wikiPageWikiLink File:QL-rear.jpg.
- ZX_Interface_1 wikiPageWikiLink File:ZX_Inteface1_Microdrive.jpg.
- ZX_Interface_1 wikiPageWikiLink File:Zx_interface_1.png.
- ZX_Interface_1 wikiPageWikiLinkText "ZX Interface 1".
- ZX_Interface_1 hasPhotoCollection ZX_Interface_1.
- ZX_Interface_1 wikiPageUsesTemplate Template:Sinclair_computers_and_clones.
- ZX_Interface_1 subject Category:1983_introductions.
- ZX_Interface_1 subject Category:Home_computer_peripherals.
- ZX_Interface_1 subject Category:ZX_Spectrum.
- ZX_Interface_1 type Computer.
- ZX_Interface_1 type Microcomputer.
- ZX_Interface_1 type Peripheral.
- ZX_Interface_1 comment "A peripheral from Sinclair Research for its ZX Spectrum home computer, the ZX Interface 1 was launched in 1983. Originally intended as a local area network interface for use in school classrooms, it was revised before launch to also act as the controller for up to eight ZX Microdrive high-speed tape-loop cartridge drives. It also included a DE-9 RS-232 interface capable of operating at up to 19.2 kbit/s — a rare instance of Sinclair using an industry-standard connector.".
- ZX_Interface_1 label "ZX Interface 1".
- ZX_Interface_1 sameAs ZX_Interface_1.
- ZX_Interface_1 sameAs ZX_Interface_1.
- ZX_Interface_1 sameAs ZX_Interface_1.
- ZX_Interface_1 sameAs ZX_Interface_1.
- ZX_Interface_1 sameAs ZX_Interface_1.
- ZX_Interface_1 sameAs m.02qdr5.
- ZX_Interface_1 sameAs ZX_Interface_1.
- ZX_Interface_1 sameAs Q2587464.
- ZX_Interface_1 sameAs Q2587464.
- ZX_Interface_1 wasDerivedFrom ZX_Interface_1?oldid=549315888.
- ZX_Interface_1 depiction ZX_Inteface1_Microdrive.jpg.
- ZX_Interface_1 isPrimaryTopicOf ZX_Interface_1.