Dma Channels; I/O Port Address Map - TMC AI5TT User Manual

Chapter 3 Hardware Description

3.6 DMA Channels

There are seven DMA Channels available on the motherboard. Only
DRQ2 is used by the floppy controller. In the case that ECP mode on
the parallel port is used, DRQ1 or DRQ3 will be used.

3.7 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
000h - 01Fh
020h - 03Fh
040h - 05Fh
060h - 06Fh
070h - 07Fh
080h - 09Fh
0A0h - 0BFh
0C0h - 0DFh
0F0h
0F1h
1F0h - 1F7h
278 - 27F
2F8h - 2FFh
2B0 - 2DF
378h - 3FFh
360 - 36F
3B0 - 3BF
3C0 - 3CF
3D0 - 3DF
3F0h - 3F7h
3F8h - 3FFh
10
Device Description
DMA Controller #1
Interrupt Controller #1
Timer
Keyboard Controller
Real Time Clock, NMI
DMA Page Register
Interrupt Controller #2
DMA Controller #2
Clear Math Coprocessor Busy Signal
Reset Math Coprocessor
IDE Interface
Parallel Port #2(LPT2)
Serial Port #2(COM2)
Graphics adapter Controller
Parallel Port #1(LPT1)
Network Ports
Monochrome & Printer adapter
EGA adapter
CGA adapter
Floppy Disk Controller
Serial Port #1(COM1)
AI5TT Pentium Baby AT Motherboard User's Manual