Atari DOS 2.5: XF551 Owner's Manual page 87

The XIO command is a generallNPUT/OUTPUT statement used
for special operations . It is used when you want to perform some
of the functions that would otherwise be performed using the
DOS Menu selections . These XIO commands are used to open a
file , read or write a record or character, close a file , reference a
location in a ' ile for reading or writing , or to rename , delete , lock,
or unlock a file. Note that X!O calls require filespecs .
CMDNO (command number) is used to designate just which of
the operations is to be performed.
CMDNO OPERATION
EXAMPLE
13 STATUS Request
XIO 13, # 1, 0, 0, " D: TEST,BAS "
32
RENAME XIO 32, #1 , 0, 0, " D: OLD,
NEW "
33 DELETE
XIO 33, #1, 0, 0, " D: TEMP
BAS "
35
LOCK FILE XIO 35, #1, 0, 0, " 0 : ATAR!.
BAS "
36
UNLOCK FILE
XIO 36 , #1 , 0, 0, " D:DOSEX ,
BAS "
253
FORMAT DISK XIO 253 . #1. 0, 0, " D1 :"
Format Single Density
254 FORMAT DISK
XIO 254 , #1, 0, 0,
" 01 :"
Format Enhanced Density
Note: Do not use the device name twice when renaming a file ,
i.e., do not use " 0 : OLD, 0 : NEW."
Following is a mini· DOS program that lets you manipulate your
disk files from BASIC. Normally if you want to re name, delete,
lock (protect) or unlock (unprotect) a file , you need to exit BASIC
by typing DOS to access the DOS menu , which usually erases
any BASIC program in memory. By using the X1Q command you
can perform these functions without exiting to DOS .
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