Atari ST520fm

Atari ST520fm

The 520ST was an all-in-one unit, similar to earlier home computers like the Commodore 64. By the time the 520ST reached the market, however, consumers demanded a keyboard with cursor keys and a numeric keypad. For this reason, the 520ST was a fairly large and awkward computer console.

Adding to this problem was the number of large cables needed to connect to the peripherals. This problem was addressed to some degree in the follow-on models which included a built-in floppy disk, though this addition resulted in the awkward placement of the mouse and joystick ports to a cramped niche underneath the keyboard.

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IMSAI Replica

IMSAI Replica

The Replica was based around the front panel board designed and produced by Don Caprio. The S100 8080A Cpu board was designed by Josh Bensadon of Toronto Canada. It is connected to a S-100 Bus Console IO Board to provide VGA output. This board was designed by John Monahan of the “S100Computers.com” website.

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Sharp MZ-700

Sharp MZ-700

The MZ-700 was launched in Japan in October 1982. lt was the first Sharp home Computer with colour, but it came without a built-in display unit; instead, sockets were provided for a colour TV or an RGB Monitor; or a B/W TV set or a Mono Monitor. lt also had a built-in printer I/F with a switch which allowed you to run the MZ-1P01 4-pen plotter-printer or a more standard MZ-80P5( K ) dot-matrix printer.

Thus, with its clock speed of 3.5MHz, the MZ-700 seemed to meet many of the criticisms levelled at the MZ-80A when it was launched in June 1982. But it was still only a halfway-house – the printer I/F only suited Sharp printers, the screen was only 40 columns, and to run disk drives you needed an extra interface of some kind.

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Olivetti M24

The Olivetti M24 is a computer that was sold by Olivetti in 1983 using the Intel 8086 CPU. The system was sold in the United States under its original name by Docutel/Olivetti of Dallas. AT&T and Xerox bought rights to rebadge the system as the AT&T PC 6300 and the Xerox 6060 series, respectively

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BBC Model B

BBC Model B

Acorn BBC model B. The Model B had the same features but had 32 KB RAM (expandable to 64K).

The “Tube” was an expansion port which was designed to connect other processors to the BBC (6502, Z80, 68000 or ARM 1 RISC). An interface card was specially designed for the tube. It used another 6502 and a Z80.

One of its most popular peripherals was the “Torch” floppy disk unit, a 5.25″ floppy disk drive with a Z80 which allowed the BBC to use CP/M software.

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