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Answer by Duncan for Denys Fisher, of Spirograph fame, using a computer late...
My name is Duncan Fisher and I'm the youngest son of Denys Fisher. I remember dad's HP programmable calculator and plotter set up very well - can't shed any light on the specific model though.What I...
View ArticleAnswer by John Dallman for Denys Fisher, of Spirograph fame, using a computer...
The pen plotter appears to be an HP 7221 or 9872. They look identical but differ in their interfacing: the 7221 is the RS-232 version and does not speak HP-GL; the 9872 uses HP-IB and HP-GL. If the...
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Answer by Raffzahn for Denys Fisher, of Spirograph fame, using a computer...
TL;DR:It's a HP 9825B desktop calculator and a HP 9872 flatbed plotter.By the looks it can be either a HP 9825 desktop calculator (*1) introduced in 1976, or a 1978 HP9831 computer (*2).(HP 9825A...
View ArticleDenys Fisher, of Spirograph fame, using a computer late 1976, early 1977
Denys Fisher, the creator of Spirograph, sold his company, bought an estate in Scotland and started working on his next creations, or at least so is narrated in a BBC's documentary, broadcast as part...
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