Re: HP38G Hardware - HC74/ HC112 , Connector Message #7 Posted by Eric Smith on 31 Aug 2009, 2:59 a.m., in response to message #6 by Thomas Chrapkiewicz
I thought there were some flip-flops in the 48GX, though maybe not in the 48G. If there aren't dual flip-flops in the 48GX, was there a hex or octal flip-flop, something like a 74HC174, 74HC273, or 74HC374, perhaps? My recollection was that some flip-flops were needed to handle the size of the internal ROM as well as the addressing for memory cards. Since the 38G doesn't support memory cards, it wouldn't need as many flip-flops.
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