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hp46 with strange modification
06-28-2022, 06:30 PM
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Jeff_Birt Offline
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RE: hp46 with strange modification
Very interesting. Lots of 7400 series logic with 1975, 1976 date codes. There is one oddball chip in a ceramic package. It is hard to make out the part number but it looks like 'IM5623' which is a 256x4 PROM. Perhaps a character code lookup for the printer output?
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hp46 with strange modification - Roland57 - 06-28-2022, 06:01 PM
RE: hp46 with strange modification - Jeff_Birt - 06-28-2022 06:30 PM



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