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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