HP9825 and HP9862A plotter - how ? - 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: HP9825 and HP9862A plotter - how ? (/thread-76350.html) |
HP9825 and HP9862A plotter - how ? - marais - 07-29-2005
Dear community, I need help getting my 9862 plotter to work with my 9825.
Andreas
Re: HP9825 and HP9862A plotter - how ? - Achim - 07-31-2005 You must no use two ROM cartridges with identical functions (e.g. general I/O) because they have identical addresses and would be selected at the same time. This might damage one ore both cartridges. The best is, you use the dedicated matrix ROM cartidge. Eventually you find this on ebay. By the way, how's your 9810 repair going on? I have also three machines repaired, including the card reader, maybe I can help.
Achim
Re: HP9825 and HP9862A plotter - how ? - marais - 07-31-2005 Achim,
Andreas
the 9862 is even supposed to work with the 9810 - marais - 08-02-2005 According to the museum, the 9862A plotter can also be used with the older 9810. I know some interface exists for the 9825, but I've never seen one for the 9810. A mystery.
Andreas
Re: the 9862 is even supposed to work with the 9810 - Tony Duell - 08-03-2005 For both the 98x0 and 98x5 series there were 'generic' parallel interfaces -- the 11202 for the 98x0 and the 98032 for the 98x5 IIRC. Many peripherals (including printers, card readers, paper tape readers, punches) used these interfaces with the right links fitted and the right cable. I wonder if the 9862 used them as well.
Re: the 9862 is even supposed to work with the 9810 - Achim (Germany) - 08-05-2005 There is a special 8 bit parallel unidirectional 9862 interface for use with the 9810/20/30. It's schematic is decribed in the 9810 patent.
Achim
Re: the 9862 is even supposed to work with the 9810 - marais - 08-06-2005 I just got myself the patent, more than 400 pages, wow! You must be referring to figure 171 on page 184 "Interface logic to plotter". I found the pin-out of the I/O backplane on Tony Duell's schematics, what's missing is the pin-out of the plotter, and of course the time to wire up the two latches, a FF and some gates. I'll give it some thought.
Andreas
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