The Printer That Wouldn’t Print: Fixing An IBM 1401 Mainframe From The 1960s


The Printer That Wouldn’t Print: Fixing An IBM 1401 Mainframe From The 1960s
The Computer History Museum has two operational IBM 1401 computers used for demos, but a few weeks ago one computer suddenly couldn’t print anything. I helped track down the problem, but it was more tricky than we expected; along the way we had to investigate the printer error checking circuits, the print buffer and even low level core memory signals.

September 18, 2018 at 01:05PM
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