This software is retired - it is now free and you can use it for whatever you want providing that you don't ask questions about "how to install", "how to do this and that" , "why no this and that" , "why something not working", etc. Retired also means - I won't work on my emulators anymore, so no requests of any kind taken. Most of them work unchanged for more than 20 years anyway.

It is assumed that a potential user of such software already knows how to transfer files from computer to calculator so this won't be explained here.

Installation procedure is the same for both HP-48GX and HP-49G.

(1) Install HP-IL enabled version of HP-41X as described in the installation guide for HP-41X together with HP41Z library containing the HPIL module.

(2) Load the HPIL module from HP41Z library to page 8.

(3) Run the HP41L.EXE server under Windows on the PC. All HP-IL server parameters can be configured from the front panel. Note that HP41L.EXE must always be started before the HP-41X emulator.

Of course, you have to connect the calculator to the PC via serial port.

HP41L.EXE server cannot be used with the HP-71X emulator.

Running HP-41X with HP-IL emulation under Emu48 (or any other HP-48/49 emulator) is not supported because of various timing problems.

Some advices to avoid HP-IL errors and similar problems:

(*) Always start HP-IL server first and HP-41X second.
(*) Serial ports on both PC and the calculator must be error-free.
(*) Use only good cable to connect the calculator to PC.
(*) To avoid data flow corruption, don’t press unnecessary keys on the calculator while HP-IL transmission is in progress.
(*) Don’t move or resize HP-IL server and console windows while HP-IL transmission is in progress because Windows will suspend the current thread and HP-IL timeout can occur.
(*) Don’t minimize/maximize HP-IL server and console windows for the same reason.
(*) Don’t toggle console between window/full screen mode for the same reason.
(*) Don’t close the console window with Ctrl+C (close the HP-IL server window instead).
(*) Restore console to the window mode before closing HP-IL server.
(*) Use LIF files of the standard size only (131072 and 630784 bytes) if possible.
(*) Uncheck ‘Frame Monitor’ if monitoring is not needed.
(*) For some printers, like LaserJet, press ‘Restart’ button on the HP-IL server to start printing after you have sent all data to be printed from HP-41X, then press ‘Form Feed’ button on the printer.