Ampro Corporation 486E manual Video State, Blank Post Test

Product Reference

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.

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