Zenith Z-100

The Zenith Data Systems Z-100 was a pre-assembled version of the Heathkit H100 electronic kit. Configured as a family (Z-120 was an all in one model, with self-contained monitor), the Z-110 (called the low profile model) was similar in size to the cabinet of an IBM PC, XT, or AT, but a bit shorter, and configured with a raised cabinet molding on the top surface within which one placed one's display monitor, designed to keep it from sliding off to either side or back. Both models had a built in keyboard that was tactilely and in appearance modeled on an IBM Selectric typewriter, the premier office machine of the day.

Dual processors: 8085 and 8088. Available with CP/M and Z-DOS (non-IBM compatible MS-DOS variant). Five S-100 expansion slots. Two 320 KB 40-track double-sided 5.25-inch floppy disk drives. Socket enabled direct plug-in of external 8-inch floppies. 2× serial ports (2661 UART), one Centronics printer port (discrete TTL chips), light pen port. 640×225 bitmap display. 8 colors (low-profile model), or monochrome upgradable to 8 greyscales (all-in-one). Base 128 KB RAM, expandable to 192 KB on board, to 768 KB with S-100 cards. (Video RAM was paged into the 64 KB block above 768 KB). The Z-100 was a "near-compatible" system to the IBM PC, using standard floppy drives. It ran a non-IBM version of MS-DOS, so "generic MS-DOS" programs would run; but most commercial PC software used IBM BIOS extensions and would fail.[3] Several companies offered software or hardware solutions to permit unmodified PC programs to work on the Z-100. The Z-100 had unusually good graphics for its era,[3] superior to the contemporary CGA (640×200 monochrome bitmap or 320×200 4-color), IBM Monochrome Display Adapter (MDA) (80×25 text-only), and arguably even the Hercules Graphics Card (720×348 monochrome). Early versions of AutoCAD were released for the Z-100 because of these advanced graphics.[4] Aftermarket vendors also released modifications to upgrade mainboard memory and permit installation of an Intel 8087 math coprocessor.

Model: ZW 111-30

Manufacturer: Zenith Data Systems
Date: Unknown

Other Systems Related To Zenith Z-100:

Item Manufacturer Date
Zenith TurboSport 386 Zenith Data Systems Unknown
Zenith ZFL-171-42 Portable Zenith Data Systems May 1985
Zenith SupersPORT SX Zenith Data Systems January 1989
Zenith MasterSport 386SL Zenith Data Systems 1992
Zenith MasterSport 386SLe Zenith Data Systems 1992
Zenith MasterSport 386SX Zenith Data Systems January 1992
Zenith MiniSport Laptop Zenith Data Systems 1993
Zenith ZFL-181-93 Laptop Zenith Data Systems 1993
Zenith Laptop Computer ZWL-183-92 Zenith Data Systems 1993

This exhibit has a reference ID of CH44090. Please quote this reference ID in any communication with the Centre for Computing History.

 

Zenith Z-100

  Peripherals   [1]

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