Vga Controller - Boser HS-5210 Manual

WT_Refresh
WT_DISABLE

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.
*OFF
*) : default setting
PUSH
PUSH
MOV
IN
POP
POP
RET
PUSH
PUSH
MOV
IN
POP
POP
RET
ON
AX
DX
DX,WDT_ET_RF
AL,DX
DX
AX
AX
DX
DX,WDT_DIS
AL,DX
DX
AX
Address
Enable
Disable
; keep AX, DX
; refresh the watch-dog timer
; get back AX, DX
; disable the watch-dog timer
; get back AX, DX
17