The 1981 Altos Model 5-15ED was an 8-bit microprocessor based system with dual floppy and Winchester hard disk together with single board microcomputer technology.

The Altos Series 5 computer system was a Z80A-based multiuser system designed to fit many commercial, technical, industrial, Scientific, and educational applications. It ran under either CP/M, MP/M II, or OASIS operating systems. In its basic figuration, the system was contained in a single chassis, however additional chassis could be connected to the basic chassis to increase system capabilities.

The basic computer system includes the CPU, four RS-232-C ports, one parallel port, 192 kilobytes of RAM, all peripheral Controllers, and one 5-1/4 inch floppy disk drive. You have to add a keyboard  terminal, provide your own floppy diskettes and cabling. 

Series 5-5D also included a five-megabyte drive and a five-inch hard disk drive. Series 5-15D also included a second one-megabyte disk drive unit.

Our Altos is a model 5-15ED, which is in excellent condition was very kindly donated by Trevor Scott together with
Altos Preliminary Series 5 Computer System User Manual
 Revision D February 26, 1982
Altos Computer Systems Tri-fold promotional leaflet 1981
Altos ACS8000 approved product list. 1st October 1981
copies of the ACS8600 16 bit system leaflet

Manufacturer: Altos
Date: 1980

This exhibit has a reference ID of CH7012. Please quote this reference ID in any communication with the Centre for Computing History.

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