Appendix B. System Address Maps
Figure 49 (Page 2 of 3). I/O Address Map
Address (Hex)
Size
Description
00C0–00DE
31 bytes
DMA 2
00F0
1 byte
Reset numeric error
0170–0177
8 bytes
Secondary IDE channel
01F0–01F7
8 bytes
Primary IDE channel
0200–0207
8 bytes
Available
0220–022F
16 bytes
Available
0240–024F
16 bytes
Available
0278–027F
8 bytes
LPT2
02E8–02EF
8 bytes
COM4/video
02F8–02FF
8 bytes
COM2
0300–0301
2 bytes
Available
0330–0331
2 bytes
Available
0332–0333
2 bytes
Available
0334–0335
2 bytes
Available
0376
1 byte
Secondary IDE channel command port
0377
1 byte
Diskette channel 2 command
0377, bit 7
1 bit
Diskette change, channel 2
0377, bits 6:0
7 bits
Secondary IDE channel status port
0378–037F
8 bytes
LPT1
0388–038D
6 bytes
Available
03B4–03B5
2 bytes
Video
03BA
1 byte
Video
03BC–03BF
4 bytes
LPT3
03C0–03CA
11 bytes
Video
03CC
1 byte
Video
03CE–03CF
2 bytes
Video
03-D4–03-D5
2 bytes
Video
03-DA
1 byte
Video
03E8–03EF
8 bytes
COM3
03F0–03F5
6 bytes
Diskette channel 1
03F6
1 byte
Primary IDE channel command port
03F7 (Write)
1 byte
Diskette channel 1 command
03F7, bit 7
1 bit
Diskette disk change channel
03F7, bits 6:0
7 bits
Primary IDE channel status port
03F8–03FF
8 bytes
COM1
04D0–04D1
2 bytes
Edge/level triggered PIC
0530–0537
8 bytes
Windows sound system
0604–060B
8 bytes
Windows sound system (if present)
LPT
n
+
400h
8 bytes
ECP port, LPT
n base address
+
hex 400
0CF8–0CFB
4 bytes
PCI configuration address register
0CF9
1 byte
Turbo and reset control register
0CFC–0CFF
4 bytes
PCI configuration data register
0E80–0E87
8 bytes
Windows sound system (if present)
Appendix B. System Address Maps
65
Summary of Contents for 6275 - PC 300 GL
Page 1: ...Technical Information Manual PC 300PL Types 6862 and 6892 PC 300GL Types 6275 and 6285...
Page 2: ......
Page 3: ...IBM Technical Information Manual PC 300PL Types 6862 and 6892 PC 300GL Types 6275 and 6285...
Page 9: ...51 IRQ Channel Assignments 68 52 DMA Channel Assignments 68 Figures vii...
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Page 88: ...IBM Part Number xxxxxxx Printed in U S A XXXXXXX...