Pci Vga Controller (Nupro-630 Only) - IBM NuPRO-630 Manual

If the Refresh cycle does not active before WDT period cycle, the on board WDT
architecture will issue a Reset or NMI cycle to the system.
The Watch -Dog Timer is controlled by two I/O ports.
443H
443H
043H
The following sample programs showing how to Enable, Disable and Refresh
the Watch -dog timer:
WDT_EN_RF
WDT_DIS
WT_Enable
WT_Rresh
WT_DISABLE

2.13 PCI VGA Controller (NuPRO-630 Only)

The NuPRO-630 has built-in a S3 86C375 VGA Controller with on-board 2 MB
memory, support resolutions up to 1280 x 1024 256 colors, reserved internal
10-pin VGA-CRT header connector.
To get more VGA drivers information, please refer to the S3's internet addre ss:
WWW.S3.COM
I/O Read
I/O Read
I/O Read
EQU 0443H
EQU 0043H
PUSH AX
PUSH DX
MOV DX,WDT_EN_RF
IN AL,DX
POP DX
POP AX
RET
PUSH AX
PUSH DX
MOV DX,WDT_ET_RF
IN AL,DX
POP DX
POP AX
RET
PUSH AX
PUSH DX
MOV DX,WDT_DIS
IN AL,DX
POP DX
POP AX
RET
The Enable cycle.
The Refresh cycle.
The Disable cycle.
; keep AX DX
; enable the watch-dog timer
; get back AX, DX
; keep AX, DX
; refresh the watch-dog timer
; get back AX, DX
; disable the watch-dog timer
; get back AX, DX
Hardware Installation 2-9