Đang chuẩn bị nút TẢI XUỐNG, xin hãy chờ
Tải xuống
Tham khảo tài liệu 'cracker handbook 1.0 part 61', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | FCB Method 0FH Open file 14H Sequential reading 15H Sequential writing 16H Create file 21H Random reading 22H Random writing Handles 3CH Create file 3DH Open file 3EH Close file driver 3FH Reading from file device 40H Writing in file device 42H Move pointer of reading writing in file 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. 40H FUNCTION Use To write to a device or a file. Call registers AH 40H BX Path of communication CX Quantity of bytes to write DS DX Address of the beginning of the data to write Return registers CF 0 if there was no mistake AX Number of bytes written CF 1 if there was a mistake AX Error code The use of this function to display information on the screen is done by giving the BX register the value of 1 which is the preassigned value to the video by the operative system MS-DOS. 01H FUNCTION Use To read a keyboard character and to display it. Call registers AH 01H Return registers