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1
Available
2
Floppy Disk (8-bit transfer)
3
Available
4
Cascade for DMA controller 1
5
Sound
6
Available
7
Available
IRQ Mapping Chart
IRQ0 System Timer
IRQ8 RTC Clock
IRQ1 Keyboard
IRQ9 LAN & USB
IRQ2 Cascade to IRQ Controller
IRQ10 COM4
IRQ3 COM2
IRQ11 COM3
IRQ4 COM1
IRQ12 PS/2 Mouse
IRQ5 SOUND CARD
IRQ13 FPU
IRQ6 FDC
IRQ14 Primary IDE
IRQ7 LPT1
IRQ15 Secondary IDE
Note:
all IRQs have been assigned to the listed devices, so if you want to
add any additional device interface, you must free the unused IRQ first.
For example, if you don’t use USB K/B or Mouse, then IRQ10 may be set
free.
1
st
MB Memory Address Map
Memory Address
Description
00000-9FFFF
System Memory
A0000-BFFFF
VGA Buffer
C0000-CBFFF
VGA BIOS
*D0000-D7FFF
DOC 2000
E0000-FFFFF
System BIOS
1000000-
Extend BIOS
Appendix B. I/O Address Map
I/O Address
Range
Description
Summary of Contents for POS-566
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