INT 2F U - DOS 4.x DISPLAY.SYS internal - INSTALLATION CHECK??? AX = AD10h ??? Return: AX = FFFFh BX = ??? (0100h in PC-DOS 4.01)
INT 2F U - DOS 5+ DISPLAY.SYS internal - ??? AX = AD10h ??? Return: CF clear if successful CF set on error Note: this function is a NOP if the active code page has never been set (AX=AD02h returns BX=FFFFh); its purpose otherwise is not known