汇编源代码之图形显示方式屏幕的保存和恢复

核心提示：mov al,video_modeor al,80hint 10hmov ah,1call vga_basejmp short rs_mode31rs_mode3:call restore_vramrs_mode31:push cspop espush cspop dsmov ax,1c02h ;恢复视频状态mov b

mov al,video_mode

or al,80h

int 10h

mov ah,1

call vga_base

jmp short rs_mode31

rs_mode3:

call restore_vram

rs_mode31:

push cs

pop es

push cs

pop ds

mov ax,1c02h ;恢复视频状态

mov bx,offset video_buffer

mov cx,7

int 10h

test flag,10000000b

jz rs_no_mouse

mov ax,17h ;恢复鼠标状态

mov dx,offset mouse_buffer

int 33h

rs_no_mouse:

ret

rs_mode7:

mov ax,7 ;显示模式 7 恢复

int 10h

push 0b000h

pop es

call restore_vram1

jmp short rs_mode31

RESTORE_SCR ENDP