HP41c Printer 82143A connector details - Printable Version +- HP Forums (https://archived.hpcalc.org/museumforum) +-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html) +--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html) +--- Thread: HP41c Printer 82143A connector details (/thread-186416.html) |
HP41c Printer 82143A connector details - Prabhu Bhooplapur - 06-16-2011 Hi, I am looking for the connector cable details of the HP82143A peripheral printer. Has anyone got the cable details or the circuit diagrams? Thanks for your help. Prabhu
Re: HP41c Printer 82143A connector details - Katie Wasserman - 06-16-2011 Get a copy of Tony Duell's hand drawn schematics for this, it's got what you need. It's available here.
Re: HP41c Printer 82143A connector details - Eric Smith - 06-16-2011 Do you mean the contacts on the module end that plugs into the HP-41? Those are described briefly in the HP-41 service manual, available on the MoHPC DVD set, or on TOS. See also "Inside the HP-41C" by Kelly McClellan, PPC Journal V6 N6 P4, September 1979, and "HP-41C Bus Interfacing" by Jim De Arras, PPC Journal V7 N3 P20, April 1980. It's a 56-bit serial bus at 6.0-6.5V CMOS levels. Level shifters are needed interface to any normal logic, whether at 3.3V or 5.0V levels.
If you mean the signals on the captive cable between the module and the printer, that's also a serial bus, but entirely different than the 41C bus. There's a description in the "Peripheral Interface Chip" (NPIC) internal HP documentation. The signals are:
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