Thanks for the suggestions. But I still don't have things working. I'm trying to program a PIC16F72 microcontroller in C. But I keep reaching dead-ends. The trouble with trying out different solutions is that it takes time to keep up with all of them as well as to implement them properly. I'd like to hear from those of you who have successfully programmed PIC16F72 microcontrollers (or similar) in C with a computer setup similar to mine. I have three computers: 1. An old desktop (from 2000) with Windows 98: Yes, I know that Windows 98 is obsolete and has inferior security. That's why I bought a used desktop and installed Linux on it so I could get onto the Internet without relying on inferior Windows security. I use the old Win98-equipped computer strictly offline. 2. A slightly newer desktop (bought used) with Damn Small Linux 3. A 2-year-old laptop with Windows XP: (I bought it for digital modes for amateur radio.) I have successfully used MPLAB to program this microcontroller with Assembly language in Windows 98 and XP. I have been able to get PICC-LITE to work, but the most sophisticated microcontroller it's compatible with seems to be the PIC16F84. I tried installing GPSIM and GPUTILS on my Linux computer, but dependency hell kept things from working properly. I installed SDCC on my Win98 computer, and it seems to work. But I'm having trouble with GPSIM. When I type the command GPSIM in DOS, I get a message saying that the LIBGTK-WIN32-2.0-0.0.DLL file is linked to missing export COMDLG32.DLL:PrintDlgExW . I have no idea what this mumbo-jumbo means. Has anyone here successfully programmed a PIC16 microcontroller (more sophisticated than the PIC16F84) in C using Windows 98, Windows XP, or Damn Small Linux? Exactly which programs do you use? What tutorials did you use to get started? What I'm trying to do is copy what already works for someone with a similar setup. -- Jason Hsu http://www.jasonhsu.com/swrwatt.html http://www.jasonhsu.com/swrwatt-source_code.txt NOTE: I am seeking employment as an embedded electronics engineer. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist