Owner`s manual

49
Appendices
Appendix B - Selecting Hardware
Settings
When installing a card in an IBM PC compatible
computer, it is important to choose settings, for that
card, that do not conflict with any other cards in the
computer. What follows are some of the settings that
other cards in your computer may already be using.
Your goal is to choose an Interrupt (IRQ) and a
COM port for your modem that does not interfere
with anything in your computer. When you have
selected the desired Port and Interrupt, follow the
instructions in Chapter 2 for using the CONFIG.SYS
settings. Remember to update your communications
software to the same settings.
COMx Ports
Port I/O What cards/ports may be using it
COM1: 3F8h The computer may already have an
internal COM1: serial port.
COM2: 2F8h The computer may already have an
internal COM2: serial port.
COM3: 3E8h The computer may already have an
internal COM3: serial port.
COM4: 2E8h The computer may already have an
internal COM4: serial port.
Interrupt Requests (IRQs)
IRQ What cards/ports may be using it
0 The Computer’s Timer (not a possible choice).
1 The Keyboard (not a possible choice).
2 If you have a PC XT: 8-bit Network card, VGA
card, hand scanner, bus mouse, MIDI card or a
sound card.
If you have a PC AT:Computer’s Controller
3 Computer’s COM2:, COM4:, COM6:, COM8:,
Network card, SCSI hard drive controller, hand
scanner, bus mouse, or a sound card.