Heathkit Advert - September 1977
From Byte - The Small Systems Journal
The Heathkit H11 Digital Computer
This advert, for Heathkit's H11 microcomputer, was part of an extravangant sixteen page spread in September 1977's Byte - The Small Systems Journal magazine.
It introduced the company's H8 and H11 micros, as well as the H9 video terminal, H10 paper tape reader, various memory and interface modules and even a cassette recorder for cheap storage.
Heathkit's H10 paper tape reader and punch, retailing for $350, or about £2,080 in 2024
It was nominally a 16-bit machine, using DEC's LSI-11 microprocessor unit - essentially the logic part of a DEC PDP-11 contained on four LSI (large-scale integration) chips.
The PDP-11 (Programmed Data Processor) was a famous series of minicomputers first launched in 1970, and upon which the first named version of Unix ran. It was estimated that DEC sold around 600,000 PDP-11s, of various types.
The Heath/DEC software agreement, required for any order
Heathkit's minimum recommended setup for the H11 included the computer itself at $1,295, a 4K memory module for $275, a parallel and serial interface, the H9 video terminal and an H10 paper tape reader, all for a bundled price of $2,508 - that's about £14,500 in 2024 money.
The presence of DEC's PDP-11 software on the H11 required the unusual step of having to sign a software licence agreement with every order.
Date created: 05 December 2023
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