
PCISA-3717EVT Socket 370 Celeron
TM
& Pentium III
®
with Ethernet , VGA( Dual Display ) ,
TV-Out , Audio Board
73
DMA, IRQ and 1
st
MB Memory
I/O Address Map
DMA Channel Assignments:
DMA Channel # Description
0 Available
1 Available
2
Floppy Disk (8-bit transfer)
3 Available
4
Cascade for DMA controller 1
5 Sound
6 Available
7 Available
IRQ Mapping Chart
IRQ0 System Timer
IRQ8 RTC Clock
IRQ1 Keyboard
IRQ9 USB
IRQ2 Cascade to IRQ Controller
IRQ10 LAN1
IRQ3 (COM2)
IRQ11 LAN2
IRQ4 (COM1)
IRQ12 PS/2 Mouse
IRQ5 Sound
IRQ13 FPU
IRQ6 FDC
IRQ14 Primary IDE
IRQ7 LPT1
IRQ15 Secondary IDE
Note:
All IRQs have been assigned to the listed devices, so if you want to
add any additional device , you must free the unused IRQ first. For
example, if you don’t use USB K/B or Mouse, then IRQ9 may be set free.
1
st
MB Memory Address Map
Memory Address Description
00000-9FFFF
System Board extension for ACPI BIOS
PCISA-3717EVT Socket 370 Celeron
TM
& Pentium III
®
with Ethernet , VGA( Dual Display ) ,
TV-Out ,Audio Board
74
A0000-CFFFF SIS630
D0000-DFFFF Free
F0000-FFFFF
System Board extension for ACPI BIOS
I/O Address Map
I/O Address
Range
Description
000-01F DMA
Controller
#1
020-021
Interrupt Controller #1, Master
040-05F 8254
Timer
060-06F 8042
(Keyboard
Controller)
070-07F
Real Time Clock, NMI Mask
080-09F DMA
Page
Register
0A0-0BF
Interrupt Controller #2
0C0-0DF DMA
Controller
#2
0F0
Clear Math Coprocessor Busy
0F1
Reset Math Coprocessor
0F8-0FF Math
Coprocessor
170-177
1F0-1F7
Fixed Disk
2F8-2FF
Serial Port 2 (COM2)
378-37F
Parallel Printer Port 1 (LPT1)
380-38F
SDLC, Bisynchronous 2
3A0-3AF Bisynchronous
1
3B0-3BB SIS
630
3C0-3DF SIS
630
3F0-3F7 Diskette
Controller
3F8-3FF
Serial Port 1 (COM1)
443, 843
Watch-dog timer
Appendix D.