S y s t e m m o t h e r b o a r d
3/18 LS700 HANDBOOK
Address (hex)
Size
Description
0070, bit 7
1 bit
PIIX4 - Enable NMI
0070, bits 6:0
7 bits
PIIX4 - Real Time Clock, Address
0071
1 byte
PIIX4 - Real Time Clock, Data
0078
1 byte
Reserved - Brd. Config.
0079
1 byte
Reserved - Brd. Config.
0080 - 008F
16 bytes
PIIX4 - DMA Page Registers
00A0 - 00A1
2 bytes
PIIX4 - Interrupt Controller 2
00B2 - 00B3
2 bytes
APM Control
00C0 - 00DE
31 bytes
PIIX4 - DMA 2
00F0
1 byte
Reset Numeric Error
0170 - 0177
8 bytes
Secondary IDE Channel
01F0 - 01F7
8 bytes
Primary IDE Channel
0201
1 byte
Audio/Game Port
0220 - 022F
16 bytes
Audio
0228 - 022F
8 bytes
Parallel Port 3
0240 - 024F
16 bytes
Audio
0278 - 027F
8 bytes
Parallel Port 2
0290 - 0297
8 bytes
Management Extension Hardware
02E8 - 02EF
8 bytes
Serial Port 4/Video (8514A)
02F8 - 02FF
8 bytes
Serial Port 2
0300 - 0301
2 bytes
MPU-401 (MIDI)
0330 - 0331
2 bytes
MPU-401 (MIDI)
0332 - 0333
2 bytes
MPU-401 (MIDI)
0334 - 0335
2 bytes
MPU-401 (MIDI)
0376
1 byte
Sec. IDE Chan. Cmd. Port
0377
1 byte
Floppy Chan. 2 Cmd.
0377, bit 7
1 bit
Floppy Disk Change, Channel 2
0377, bits 6:0
7 bits
Sec. IDE Channel Status Port
0378 - 037F
8 bytes
Parallel Port 1
0388 - 038D
6 bytes
FM Synthesizer