AH=3CH - 8086 INT 21H

AH = 3Ch - "CREAT" - CREATE OR TRUNCATE FILE
Entry:
CX = file attributes
DS:DX -> ASCIZ filename
Return:
CF clear if successful, AX = file handle
CF set on error AX = error code (03h,04h,05h)
Notes: if a file with the given name exists, it is truncated to zero length

Syntax

MOV AH,3CH
INT 21H

Example

MOV AH,3CH
INT 21H

Output / Return Value

Return:
    CF clear if successful, AX = file handle
    CF set on error AX = error code (03h,04h,05h)

Limitations

Alternatives / See Also

Open a File

Reference