Manufacturer/Support ID Software, Inc. (800) ID-GAMES - Sales/Support/Automated Support Email ID Software Support Doom ][ v1.666 DIP Switches: 3, 5, and 8 DOWN (ON) CHANGE PORT: Run SETUP.EXE located in your DOOM2 directory. Select Run Network/Modem/Serial Game. Next select Modem and set the modem port to match your modem settings. Changing IRQ: Only IRQ 3 and IRQ 4 seemed to work in this version. The program automatically picks IRQ4 for COM1 and IRQ3 for COM2. INIT STRING: To change the init string, load a text editor and open the file MODEM.CFG, located in the DOOM ][ directory. Change the first init string to `AT &F1', and the second init string can be left alone. Set the port rate, which default to 9600, to 19200 for our 14.4k modems, and 57600 for our 28.8k or faster modems. TERMINAL MODE: None. Notes: We have found some problems with DOOM ][ and modems that are configured to COM3 and COM4. When you have a modem on COM3, IRQ5, the software keeps defaulting back to IRQ4.