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User’s Manual
Custom Embedded Solutions
WIN Enterprises, Inc. [email protected] www-win-ent.com (978)688-2000
85
DMA Channel Assignment:
Channel 4 is by default used to cascade to two controllers
Channel
Assignment
DMA0
ISA/Free
DMA1
ISA/Free
DMA2
ISA/Free
DMA3
ISA/Free
DMA4
AT DMA controller /Cascade
DMA5
ISA/Free
DMA6
ISA/Free
DMA7
ISA/Free
Memory Map:
The following table indicates memory of PL-80230. The address ranges
specify the runtime code length.
Memory below 1MB (1MB ~ 640KB)
Address Range
Type
Owner
A0000 ~ AFFFF
ISA
VGA Adapter
B0000 ~ BFFFF
ISA
VGA Adapter
C0000 ~ CC3FF
ISA
Adapter ROM
E0000 ~ EFFFF
ISA
Mapped RAM
F0000 ~ FFFFF
ISA
System BIOS