INT 21 - DOS 2+ - "CHDIR" - SET CURRENT DIRECTORY AH = 3Bh DS:DX -> ASCIZA NUL-terminated ASCII string. The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h. Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. pathname to become current directory (max 64 bytes) Return: CF clear if successful AX destroyed CF set on error AX = error code (03h) (see #01680 at AH=59h/BX=0000h) Notes: if new directory name includes a drive letter, the default drive is not changed, only the current directory on that drive changing the current directory also changes the directory in which FCBsee File Control Block file calls operate under the FlashTek X-32 DOS extender, the pointer is in DS:EDX SeeAlso: AH=47h,AX=713Bh,INT 2F/AX=1105h