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A comment on The transparent chip inside a vintage Hewlett-Packard floppy drive. Parent comment

Re:The transparent chip inside a vintage Hewlett-Packard flo... by userbinator on Wednesday December 20, 2023 @05:42PM (#38714635)
Since you mention it was a defective part, were you able to see the defect on the die?
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Re:The transparent chip inside a vintage Hewlett-Packard flo... by kens on Wednesday December 20, 2023 @08:00PM (#38715844)
We didn't see anything obviously wrong with the part. One bit of communication with the microprocessor was flaky, so it was probably a weak transistor. The consequence was that the Z80 attempted to look up a command in a lookup table, but the command wasn't there so it ended up looping through all of memory, hanging the floppy drive.
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