Ampro Corporation 486E - Manual (Page 97)

Product Reference
2–81
Video State
Video State can be set to Enabled or Inhibited. Inhibited blanks the display until an application
program makes a call to the Video Restore State function in the video BIOS through INT10h. This
provides a means of controlling what appears on the screen when the system starts up. This option
can be used to inhibit the POST test display and everything else that DOS or an application would
display, until a call is made to the video BIOS.
The following is an example of code that reenables the display inhibited by this option:
;=====================================================================
init: mov ah,1ch
mov al,-1
mov bx,414Dh
mov cx,5052h
int 10h
;=====================================================================
Blank Post Test
The blank post test either enables or disables the POST display. If set to Disabled, the messages
from the POST is not be sent to the console. Video display is restored when POST is completed. To
inhibit display of a broader range of system and application messages, see Video State, above.