HP Vectra VL600 Supplementary Manual page 133

I/O Addresses 96h - 97h HP reserved
used by PC 170h - 177h, 376h IDE secondary channel
1F0h - 1F7h, 3F6h IDE primary channel
278h - 27Fh (and 3A8h) parallel port
2E8h - 2EFh serial port
2F8h - 2FFh serial port
378h - 37Fh parallel port
3B0h - 3DFh (3B0-3BB,3O0-3DF) integrated video graphics controller
3E8h - 3EFh serial port
3F0h - 3F5h, 3F7h integrated floppy disk controller
3F8h - 3FFh serial port
678h - 67Bh parallel port if ECP mode is selected
778h - 77Bh parallel port if ECP mode is selected
5 Technical Information
IRQs, DMAs, and I/O Addresses Used by Your PC
133