Bios; I/O Port Address Map - TMC TI7NBA User Manual

3.4 BIOS

The BIOS on the TI7NBA motherboard provides the standard BIOS
functions plus the following additional features:
1. ISA Plug and Play (PnP) Extension
Unlike PCI cards that are Plug and Play, ISA cards require setting
jumpers to resolve hardware conflicts. To make a computer system
PnP, an ISA PnP standard is established and supported by new
operating systems, such as Windows 95. Under Windows 95, the
motherboard BIOS must have an ISA PnP extension to support new
ISA PnP cards.
2. Power Management
The power management feature provides power savings by slowing
down the CPU clock, turning off the monitor screen and stopping the
HDD spindle motor. The BIOS fully conforms to ACPI (Advanced
Configuration and Power Interface) specification.

3.5 I/O Port Address Map

Each peripheral device in the system is assigned a set of I/O port
addresses, which also becomes the identity of the device. There is a total
of 1K port address space available. The following table lists the I/O port
addresses used on the motherboard.
Address Device Description
000h - 01Fh DMA Controller #1
020h - 03Fh Interrupt Controller #1
040h - 05Fh Timer
060h - 06Fh Keyboard Controller
070h - 07Fh Real Time Clock,, NMI
080h - 09Fh DMA Page Register
0A0h - 0BFh Interrupt Controller #2
0C0h - 0DFh DMA Controller #2
0F0h Clear Math Coprocessor Busy Signal
0F1h Reset Math Coprocessor
1F0h - 1F7h IDE Interface
2F8h - 2FFh Serial Port #2(COM2)
378h - 3FFh Parallel Port #1(LPT1)
3F0h - 3F7h Floppy Disk Controller
3F8h - 3FFh Serial Port #1(COM1)
TI7NBA Socket 370 ATX Motherboard User's Manual
Chapter 3 Hardware Description
9