NEC VERSA P, Service Manual

Page: 33 / 177

1-18 Technical Information
Table Section 1-7 Versa P I/O Address Map
Address (Hex) I/O Device Name
0378H-037AH LPT1
03BCH-03BEH LPT3
03F0H-03F5H Diskette Drive Controller Port Status
03F8H-03FFH Serial Controller Port A
0461H Port 461 EISA mode
0C00H Extended System Port 1
0C01H Extended System Port 2
0C02H Extended System Port 3
0C03H Extended System Port 4
0C10H Extended System Port 6
03E0-03E1 PCMCIA (CL-PD6720)
Interrupt Controllers
Using interrupts, it is possible to change the code sequence. To change the sequence, reas-
sign the interrupt-levels. Fifteen interrupts can be used with a cascade connection of
8259INTC x 2.
Interrupt-level assignments 0 through 15 are listed in Table Section 1-8, in order of de-
creasing priority.
Table Section 1-8 Versa P Series Interrupt Level Assignments
Controller
Master/Slave
Priority
Name
Device
Master
0
IRQ00 Counter/Timer 1
Master
1
IRQ01 Keyboard
Master
2
IRQ02 INT output from controller 2
Slave
3
IRQ08 Real-time Clock
Slave
4
IRQ09 Reserved
Slave
5
IRQ10 Reserved (Digitizer)
Slave 6
IRQ11 Reserved (PCMCIA)
Slave
7
IRQ12 PS/2 Mouse*
Slave
8
IRQ13 Math Coprocessor (built into CPU)