17
WT_Refresh
PUSH
AX
; keep AX, DX
PUSH
DX
MOV
DX,WDT_ET_RF
; refresh the watch-dog timer
IN
AL,DX
POP
DX
; get back AX, DX
POP
AX
RET
WT_DISABLE
PUSH
AX
PUSH
DX
MOV
DX,WDT_DIS
; disable the watch-dog timer
IN
AL,DX
POP
DX
; get back AX, DX
POP
AX
RET
2.10 VGA Controller
The SiS 5598 Chip with built-in VGA controller is a highly integrated single
chip solution for Pentium PCI/ISA system. A portion of on-board DRAM is
shared of maximum 4 Mbytes by the integrated VGA controller.
The SiS 5598 Chip consists of Host-to-PCI bridge function, PCI to ISA
bridge function, PCI/IDE function, Universal Serial Bus host/hub function,
Integrated RTC, Integrated Keyboard Controller and Graphics/Video
accelerate function.
SiS 5598 Chip supports Enhanced Power Management, including legacy
Power Management Unit and Advanced Configuration and Power Interface
(ACPI). It also supports ATA Synchronous DMA transfer protocol to
improve the IDE performance and Common Architecture for moving ISA
function to PCI to improve system performance.
??
JP2 : VGA Enable Selection
PIN NO.
Address
*OFF
Enable
ON
Disable
*) : default setting
Summary of Contents for HS-5020
Page 11: ...9 2 3 HS 5210 5020 s Layout ...
Page 18: ...16 RET ...
