Table A–4 PC–600 interrupt map
PC–600 interrupt map
IRQ Default
Device
Alternate
IRQ0 System
Timer
IRQ1 Keyboard
IRQ2
Cascade to IRQ9
IRQ3 COM2 PC/104
IRQ4 COM1 PC/104
IRQ5 Audio
PC/104
IRQ6 Floppy PC/104
IRQ7 LPT
PC/104
IRQ8 RTC
Alarm
IRQ9 COM3,
COM4
IRQ10 Ethernet2
PC/104
Ethernet1
IRQ11 (shared)
PC/104
USB1/2
IRQ12 Mouse
IRQ13
Reserved for FPU
IRQ14 IDE
primary
IRQ15 IDE
secondary
Table A–5 PC–600 memory map
PC–600 memory map
Address Size
Description
Shadowing
00000H to
9FFFFH
640KB
DOS and extended BIOS RAM
A0000H to
BFFFFH
128KB
Off Card Memory (shadowable)
C0000H to
CBFFFH
48KB
Off Card Video BIOS
(shadowable)
Setup
Option
CC000H to
D7FFFH
48KB
Off Card Memory
D8000H to
DFFFFH
32KB
Extended BIOS Area when X
jumper installed or off card
shadowable
Enabled
E0000H to
F1FFFH
128KB System
BIOS
100000H to
FFFFFFFFH
4GB
Addressable Extended Memory
131