Assembler 4

VIDEO DISPLAY FUNCTIONS



02H FUNCTION

Use:

It displays one character to the screen.

Calling registers:

AH = 02H
DL = Value of the character to display.

Return registers:

None.

This function displays the character whose hexadecimal code corresponds to the value stored in the DL register, and no register is modified by using this command.

The use of the 40H function is recommended instead of this function.

09H FUNCTION

Use:

It displays a chain of characters on the screen.

Call registers:

AH = 09H
DS:DX = Address of the beginning of a chain of characters.

Return registers:

None.

This function displays the characters, one by one, from the indicated address in the DS:DX register until finding a $ character, which is interpreted as the end of the chain.

It is recommended to use the 40H function instead of this one.