PCM-9562 User Manual
94
D.1
1st MB memory map
D.2
DMA channel assignments
D.3
Interrupt assignments
Table D.1: 1st MB memory map
Addr. Range (Hex)
Device
E0000h - FFFFFh
System ROM
CC000h - DFFFFh
Available
C0000h - C7FFFh
VGA BIOS
B8000h - BFFFFh
CGA/EGA/VGA text
B0000h - B7FFFh
Reserved for graphic mode usage
A0000h - AFFFFh
EGA/VGA graphics
00000h - 9FFFFh
Base memory
Table D.2: DMA channel assignments
Channel
Function
0
Available
1
Available
2
Floppy disk (8-bit transfer)
3
Available (parallel port)**
4
Cascade for DMA controller 1
5
Available
6
Available
7
Available
** Parallel port DMA default setting: DMA 3, Parallel port DMA selection: DMA 1 or 3
Table D.3: Interrupt assignments
Interrupt#
Interrupt source
IRQ0
Timer Clock
IRQ1
Keyboard
IRQ2
Second 8259A
IRQ3
COM3/COM6
IRQ4
COM1/COM2
IRQ5
Reserved
IRQ6
Floppy Disk
IRQ7
LPT1
IRQ8
Real time clock
IRQ9
Redirected IRQ2
IRQ10
COM4
IRQ11
COM5
IRQ12
Reserved
IRQ13
Math Coprocessor
IRQ14
Fixed Disk
IRQ15
Reserved
* Refer to the table of msd.exe
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