User`s manual

101 Appendix B
B.24 USB port switch (S1, S2)
Table B.24: USB port switch (S1,S2)
B.25 System I/O Ports
Table B.25: System I/O ports
S1 S2
Pin Signal Pin Signal
1 USBP2N 5 USBD2N
2 USBP2P 6 USBD2P
3 USBP2P 7 USBP2PP
4 USBP2N 8 USBP2NN
Addr. range (Hex) Device
000-01F DMA controller
020-021 Interrupt controller 1, master
022-023 Chipset address
040-05F 8254 timer
060-06F 8042 (keyboard controller)
070-07F Real-time clock, non-maskable interrupt (NMI)
mask
080-09F DMA page register
0A0-0BF Interrupt controller 2
0C0-0DF DMA controller
0F0 Clear math co-processor
0F1 Reset math co-processor
0F8-0FF Math co-processor
1F0-1F8 Fixed disk
200-207 Game I/O