Appendix B. System Address Maps
Figure 42 (Page 2 of 3). I/O Address Map
Address (Hex)
Size
Description
0080
1 byte
POST checkpoint register during POST only
008F
1 byte
Refresh page register
0080–008F
16 bytes
PIIX4, DMA page registers
0090–0091
15 bytes
General I/O locations — available to ISA bus
0092
1 byte
PS/2 keyboard controller registers
0093–009F
15 bytes
General I/O locations
00A0–00A1
2 bytes
Interrupt controller 2
00A2–00BF
30 bytes
APM control
00C0–00DF
31 bytes
DMA 2
00E0–00EF
16 bytes
General I/O locations — available to ISA bus
00F0
1 byte
BX, Coprocessor Error Register
00F1–016F
127 bytes
General I/O locations — available to ISA bus
0170–0177
8 bytes
Secondary IDE channel
01F0–01F7
8 bytes
Primary IDE channel
0200–0207
8 bytes
Available
0220–0227
8 bytes
SMC 37C673, Serial port 3 or 4
0228–0277
80 bytes
General I/O locations — available to ISA bus
0278–027F
8 bytes
SMC 27C673, LPT3
0280–02E7
102 bytes
Available
02E8–02EF
8 bytes
SMC PC37C673, Serial port 3 or 4
02F8–02FF
8 bytes
COM2
0338–033F
8 bytes
SMC PC37C673, Serial port 3 or 4
0340–036F
48 bytes
Available
0370–0371.
2 bytes
SMC SIO planar Plug–n–Play index/data registers
0372–0375
4 bytes
Available
0376–0377
2 bytes
IDE channel 1 command
0378–037F
8 bytes
LPT2
0380–03B3
52 bytes
Available
03B4–03B7
4 bytes
Video
03BA
1 byte
Video
03BC–03BE
16 bytes
LPT1
03C0–03CF
16 bytes
Video
03D4–03D7
4 bytes
Video
03DA
1 byte
Video
03D0–03DF
11 bytes
Available
03E0–03E7
8 bytes
Available
03E8–03EF
8 bytes
COM3 or COM4
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
Appendix B. System Address Maps
41
Содержание PC 300GL Type 6267
Страница 1: ...Technical Information Manual PC 300GL Types 6267 6277 and 6287 ...
Страница 5: ...Index 48 Contents v ...