TI 59 Diagnostic Card Listing

[voltaage]

(02-03-2022 05:58 PM)Tinue Wrote:  The lower part is the actual diagnostic routine, and the upper part seems to be an even less documented test pattern to stress the card reader.

That picture is a beauty to look at! At some point, I wondered about buying one of those magnetic tape viewers to inspect cassettes and credit cards. I coudn't hold my curiosity of taking my magic electromagnetic signal detector (which is just the guts of a walkman packed in a thick pen aseembly with a speaker) to hear what was being recorded on the card. Just a wooey mess good for fun beats.

The second side clearly reveals the "77" step test, in its four track glory.

Did you use ferrofluid to take the picture?