HP95LX/200LX IR reception


Hi to all,

I need to know if the IR receptor of the HP-95LX or/and HP-200LX have the capability of receive RED-EYE HP printer format. I know that they can transmit. I'm planning to build a software to "read" print-outs from my HP-42S and HP-17BII to read their ROMs. I cannot use another way right now, as the only IR receivers that I have is on the palmtops, I don't have any HP-48xx calculator.




I'm not sure i exactly understand your question, but will give it a shot.

There are several programs at SUPER for the IR port. One of them causes the 200LX to emulate an HP "red eye" (i think the 82240B). I will look through my own collection and see if this can be dug up, should you not be able to find it on the web any more.

best regards,


I'm searching a way to the 200LX (or 95LX) to receive IR printings from the HP-42S and 17BII "emulating" a printer. If I can get enough info on how the IR works I can do a program myself in assembler or Turbo Pascal to it. If is already a program that do that, it'll save some time.

Best regards,



After looking through a couple programs, i think i agree with Mikes post. the program i recalled was for printing to a red eye.

i do recall reading posts a few years back, and running some trials of my own. i used a 41 with the IR module, and was able to filter using a couple escape sequences some of the goobledygook from a PRP to a file on the 200LX which seemed sorta useful, until i suddenly had a 82164A which worked straight up.

best of luck



AFAIK there is a program from Thomas Rundel to print a screen shot of the 200LX to an IR-printer. But up to today I did not find a program neither for the 200LX nor the 95LX to receive the IR signal from "Blinky" (the IR printer ROM for the HP-41) or the Pioneer calculators. If you find some or do one on your own, pls let me know (see at http://ourworld.compuserve.com/homepages/NutEm/nutem.htm#re). BTW, I asked some experts and none did bite the hook, one even doubts if the timers of the 200LX are stable enough to decode a one-way IR transmision. There is an article in this HP-museum which advices to use the sound card of a PC as stable timer.


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