IBM 6275 - PC 300 GL, Technical Information Manual

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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
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