User manual

43 PCA-6742 User Manual
Appendix C System Assignments
C.3 Interrupt assignments
C.4 1st MB Memory map
Table C.3: Interrupt assignments
Interrupt# Interrupt source
NMI Parity error detected
IRQ 0 Interval timer
IRQ 1 Keyboard
IRQ 2 Interrupt from controller 2 (cascade)
IRQ 8 Real-time clock
IRQ 9 Serial communication port 4
IRQ 10 Available
IRQ 11 Available
IRQ 12 PS/2 mouse
IRQ 13 INT from co-processor
IRQ 14 Preliminary IDE
IRQ 15 Secondary IDE for CompactFlash
IRQ 3 Serial communication port 2
IRQ 4 Serial communication port 1
IRQ 5 Serial communication port 3
IRQ 6 Reserve
IRQ 7 Parallel port 1 (print port)
Table C.4: 1st MB Memory map
Addr. range (Hex) Device
E000 - EFFF System ROM
C800 - DFFF Available
C000h - C7FFh VGA BIOS
B800h - BFFFh CGA/EGA/VGA text
B000h - B7FFh Reserved for graphic mode usage
A000h - AFFFh EGA/VGA graphics
0000h - 9FFFh Base memory