HP Book 900 manual System Input/Output Addresses 100-3FF, DMA Channels

Table 1-9. System Input/Output Addresses (100-3FF)

120-127	Audio (OmniBook 900† only)
170-177	Internal CD-ROM drive (secondary IDE controller)
1F0-1F7	Internal hard disk (primary IDE controller)
220-22F	Audio
376	Internal CD-ROM drive (secondary IDE controller)
378-37F	LPT1 (printer port)
388-38B	Audio
3B0-3BB	Video adapter
3C0-3DF	Video adapter
3E0-3E1	PCMCIA controller
3F0-3F5	Floppy controller
3F6	Internal hard disk (primary IDE controller)
3F7	Floppy controller
3F8-3FF	COM1 (serial port)

†Models called 900† in this manual have no marking in the serial number, whereas models called 900B have 900 B after the serial number.

	Table 1-10. DMA Channels
0	Sound record (OmniBook 900† only)
	Free (OmniBook 900B only)
1	Sound playback
2	Floppy drive
3	LPT1 (ECP parallel port)
4	Cascade
5	Free
6	Free
7	Free

†Models called 900† in this manual have no marking in the serial number, whereas models called 900B have 900 B after the serial number.

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