Interrupt 21h Function 440Dh Minor Code
6Eh
Retrieves
information about the swap file.
mov ax, 440Dh ; generic IOCTL
mov ch, 08h ; device category (must be 08h)
mov cl, 6Eh ; Find Swap File
mov dx, seg PathBuf ; see below
mov ds, dx
mov dx, offset PathBuf
int 21h
jc error
mov [PagerType], ax ; pager type
mov WORD PTR [FileSize], bx ; swap file size in 4K pages
mov WORD PTR [FileSize+2], cx
Parameters
PathBuf
Address of
the buffer that receives the path of the swap file. To determine the maximum
allowed length of a path for the volume, call Get Volume Information (Interrupt
21h Function 71A0h).
Return Value
Clears the
carry flag, copies the swap file path to the given buffer, and sets the
following registers if successful:
|
AX |
Pager type.
It can be 1 for no pager, 2 for paging through MS-DOS, and 3 for paging
through the protected-mode input and output (I/O) supervisor. |
|
CX:BX |
Current
size of the swap file in 4K pages. |
Otherwise,
this function sets the carry flag and sets the AX register to an error value.