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0232-PRINT-CHAR.md

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0232 Print character

This is service is used to a print single character in AL. It is all used to print characters of NULL (00h) terminated strings or the digits of a number.

SYS0232: MOV DL,AL
SYS0234: MOV AH,06
SYS0236: INT 21
SYS0238: RET

Prints the ASCII character in DL directly to the console using BIOS INT 10h AH = 06h service. If DL is within the range: 0 (00h) < DL < 255 (FEh), then the character is printed on the console, otherwise if DL = 255 (FFh) then a single character input is requested instead.

Because it is a NEAR RET, it can only be called from within the system library.

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