Edwin Aures spent a few hours to present the still functional Zuse Z23 from the Erlangen IT department. He had very interesting things to tell about the history of the old lady and her restoration. Finally, I was able to attend a very detailed demonstration. Anchor links: 00:19 Greetings 00:33 Scatter angle calculator of a German submarine 01:36 Zuse card validator 02:06 Creed printer model 1000 02:19 Open source printer driver 02:59 Cupboard with punched tape programs 05:45 History of the Erlangen Z23 07:43 Drum storage 10:04 Magnetic-core memory 10:38 Inside of the Z23 11:16 Aging problems of the components 13:33 Comparison with Intel 4004 14:08 Control panel, paper tape reader, teleprinter 14:50 How the paper tape works 16:49 Operating system (Grundprogramm) with reading routines 17:26 Starting up the machine 18:48 Explanation of console 20:25 Operating system checksum test 23:48 Examples for different machine commands 25:10 Chase lighting with left shift explanation 26:02 Chase lighting with left shift on paper tape 29:19 Chase lighting with left shift listing 30:14 Reaction test 31:20 Sinus-Anna test program for machine 32:38 Music program by Werner Hildebrand 34:53 Information about the demonstrations 35:24 Information about the collection Links: - ISER homepage: https://www.iser.fau.de/ - Blog for movie: http://www.holzheu.de/informatik-sammlung-erlangen Music used: - Zuse dear Zuse by Werner Hildebrand Changelog: - 2020/07/15 First version