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HP-41 and video interface 82163a / 92198a - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: General Forum (/forum-4.html) +--- Thread: HP-41 and video interface 82163a / 92198a (/thread-3906.html) |
RE: HP-41 and video interface 82163a / 92198a - Dave Frederickson - 04-24-2017 03:44 PM My 92198A manual is dated 1/84. Here's the 71B supplement. [attachment=4692] RE: HP-41 and video interface 82163a / 92198a - rprosperi - 04-24-2017 05:24 PM (04-24-2017 03:44 PM)Dave Frederickson Wrote: My 92198A manual is dated 1/84. Here's the 71B supplement. Thanks for sharing the '71 Supplement. My pre-HP, Mountain Computer only branded manual is dated June 1983, Manual No. 11-MC00701A-02. As it's pre-71 announcement, it includes model-specific content only for 41C, 75 and 85. I presume the HP-branded version is the same, with no '71 content except for the supplement? RE: HP-41 and video interface 82163a / 92198a - Dave Frederickson - 04-24-2017 05:35 PM (04-24-2017 05:24 PM)rprosperi Wrote:(04-24-2017 03:44 PM)Dave Frederickson Wrote: My 92198A manual is dated 1/84. Here's the 71B supplement. See manual on the HP41 DVD. RE: HP-41 and video interface 82163a / 92198a - Mark Hardman - 04-25-2017 02:00 AM (04-24-2017 03:11 AM)Dave Frederickson Wrote: I tried connecting the interface to the composite input on my monitor but experienced a lot of jitter. Marcus suggested I try a vintage monitor and that did the trick. I suspect that modern composite interfaces have a higher input bandwidth than the vintage CRT monitors. I would think that some sort of filter would eliminate the higher frequencies that are causing the jitter, but was unsuccessful finding something. I was hoping to verify that the video interface was working before purchasing (and paying freight) for a composite monitor. From what you are saying, a composite to HDMI converter would work well enough to do just that. Thanks! Mark Hardman RE: HP-41 and video interface 82163a / 92198a - Dave Frederickson - 04-25-2017 03:43 AM (04-25-2017 02:00 AM)Mark Hardman Wrote: I was hoping to verify that the video interface was working before purchasing (and paying freight) for a composite monitor. From what you are saying, a composite to HDMI converter would work well enough to do just that. I tried a converter, too, and it to exhibited jitter, but it'll verify whether or not the interface is working. If the interface is good I have a 14" National NL-214C you can have. Dave |