Tektronix 405x

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thumb | | Tektronix 4051 computer graphics terminal.The Tektronix 405x series was a series of graphics microcomputers produced by Tektronix in the late 1970s through the early 1980s. The display technology was similar to the Tektronix 4014 terminal, using a storage tube display to avoid the need for video RAM. The 4051 and 4052 included a CPU, up to 32 kilobytes of RAM, keyboard, 11" CRT and full-sized 300 kilobyte 3M DC-300 series high speed data cartridge (as opposed to the cassette tape drive used by the HP 9830) to the right of the CRT in a single, desktop-sized housing. All models included a GPIB parallel bus interface for controlling lab and test equipment and external input and outout peripherals. A simple operating system and BASIC interpreter were included in ROM. A hard copy device was available which made copies of the screen.

External storage units were available for the 405x series computers. The smaller, desktop 4907 storage unit used single or dual Shugart 851R 8 inch floppy drives with 64 kilobyte floppies and the larger, 2-drawer filing cabinet sized, 4909 storage unit used a CDC 96 megabyte hard drive with the first 16 megabytes in the form of a removable disc-pack. A 4924 external tape drive used the same tape cartridges as the in-board unit.

The 4050 series was popular at a time when many companies were struggling to make the transition from paper to digital. Two sizes of the 4956 graphics tablet offered a slow process for inputing from paper...
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