DOS Fn 1aH: Set Disk Transfer Address (DTA)
Expects: AH 1aH
DS:DX address for the DTA
Info: This sets the Disk Transfer Address for use in subsequent DOS
Notes: ■ All FCB-type file accesses take place at the DTA
■ File-finding fns 11H, 12H, 4eH and 4fH place data into the DTA
■ The DTA is global, so be careful when setting it in a recursive
or re-entrant procedure or when acting as a TSR
■ When a program is started, its DTA is at offset 80H in the PSP.
Be wary of operations which will put more than 128 bytes in the
DTA since that would transfer data over top of whatever follows
the PSP in memory.
See Also: Fn 2Fh Get DTA
Program Startup & Exit