AT&T/Teletype 5620 Dot Mapped Display Terminal
The 5620 was the first commercial version of Rob Pike’s BLIT terminal. The original BLIT design used a common Motorola 68000 microprocessor. Since Western Electric, an AT&T subsidiary, was in the microprocessor business, the 5620 used a Western Electric WE32000 microprocessor instead. Later models, the 630 and 730, reverted to the 68000.
* 15 " diagonal screen (10.24" x 8" visible) * 1024 x 800 dots (100 dots/inch horizontal and vertical) * High persistance P39 green phosphor * BELLMAC-32 microprocessor based - Full 32-bit non-multiplexed data and address paths - Large instruction set - Virtual memory capability with 4 levels of protection * 256K RAM, 64K EPROM * Low-profile (30 mm) keyboard with numeric pad and 8 PF keys * Mouse * UNIX (System V)-based software - Multiplexor which provides up to six concurrent `windows' of arbitrary size on the screen, each appearing to the UNIX host as a separate virtual terminal. Optional downloaded terminal process under control of terminal operating system associated with each window. - Mouse-based text editor - BELLMAC software development system - C cross compiler and tools - Terminal debugger highly integrated with C compiler - Downloader - Tektronix 4014 emulation - Font Editor - TROFF preview facility - Picture editor produces TROFF input text for preparing document figures.