Intel Desktop Board D815EEA Product Guide
70
I/O Map
Table 29.
I/O Map
Address (hex)
Size
Description
0000 - 000F
16 bytes
DMA controller
0020 - 0021
2 bytes
Programmable Interrupt Control (PIC)
0040 - 0043
4 bytes
System timer
0060
1 byte
Keyboard controller byte—reset IRQ
0061
1 byte
System speaker
0064
1 byte
Keyboard controller, CMD / STAT byte
0070 - 0071
2 bytes
System CMOS / Real Time Clock
0072 - 0073
2 bytes
System CMOS
0080 - 008F
16 bytes
DMA controller
0092
1 byte
Fast A20 and PIC
00A0 - 00A1
2 bytes
PIC
00B2 - 00B3
2 bytes
APM control
00C0 - 00DF
32 bytes
DMA
00F0
1 byte
Numeric data processor
0170 - 0177
8 bytes
Secondary IDE channel
01F0 - 01F7
8 bytes
Primary IDE channel
One of these ranges:
0200 - 0207
0208 - 020F
0210 - 0217
0218 - 021F
Can vary from 1 byte
to 8 bytes
Audio / game port
One of these ranges:
Audio (Sound Blaster Pro
†
-compatible)
0220 - 022F
16 bytes
0240 - 024F
16 bytes
0228 - 022F*
8 bytes
LPT3
0278 - 027F*
8 bytes
LPT2
02E8 - 02EF*
8 bytes
COM4 / video (8514A)
02F8 - 02FF*
8 bytes
COM2
One of these ranges:
0320 - 0327
0330 - 0337
0340 - 0347
0350 - 0357
8 bytes
MPU-401 (MIDI)
0376
1 byte
Secondary IDE channel command port
0377, bits 6:0
7 bits
Secondary IDE channel status port
0378 - 037F
8 bytes
LPT1
0388- 038B
6 bytes
AdLib
†
(FM synthesizer)
03B0 - 03BB
12 bytes
Intel
®
82815 - Memory Controller Hub (MCH)
03C0 - 03DF
32 bytes
Intel 82815 - Memory Controller Hub (MCH)
03E8 - 03EF
8 bytes
COM3
continued