PCM-C418/Configuration
v1.0
www.winsystems.com
Page 16
6.4 DMA Map
6.5 Memory Map
6.6 Watchdog Timer
The PCM-C418 features an advanced watchdog timer that can be used to guard against
software lockups. Two interfaces are provided to the watchdog timer. The Advanced
interface is the most flexible and recommended for new designs. The other interface
option is provided for software compatibility with older WinSystems single-board
computers.
Table 7:
DMA resources
DMA#
Description
Usage
DMA0
Available
DMA1
Available
DMA2
Available
DMA3
Available
DMA4
Available
DMA5
Available
DMA6
Available
DMA7
Available
Table 8:
HEX ranges
HEX Range
Usage
0000:0000-9000:FFFF
System RAM
A000:0000-A000:FFFF
EGA/VGA video memory
B000:0000-B000:7FFF
MDA RAM, Hercules graphics display RAM
B000:8000-B000:FFFF
CGA display RAM
C000:0000-C000:7FFF
EGA/VGA BIOS ROM
C000:8000-C000:FFFF
Boot ROM enable
D000:0000-D700:FFFF
Expansion ROM space
D800:0000-DB00:FFFF
SPI FLASH emulation floppy A enable
DC00:0000-DF00:FFFF
Expansion ROM space
E000:0000-E000:FFFF
USB Legacy SCSI ROM space
F000:0000-F000:FFFF
Motherboard BIOS