Register parameters
RST 20H, DEFW $180C
IN: C = reason code DQ_Dev ($00), define default device DQ_Dir ($03), define default directory DQ_Fnm ($06), define filename match string B = 0, always HL = points to a null-terminated string, the argument OUT: Fc = 0, Successful Fc = 1, A = RC error if failure Registers affected after return: ..BCDEHL/IXIY same AF....../.... different
Notes
Internal operating system usage.
DC_SP is a subcall of OS_SP, use OS_SP instead. Attribute (Dev, Dir, Fnm) is set into Filer process if it is running, otherwise by Index. If DQ_Dev argument points to null byte, PA_Dev is used as source. Works if string at HL is terminated by a control-char ($00-$1F).
Related calls
DC_Sp, DC specify
DC_Nq, DC enquire
OS_Sp, specify
OS_NQ, enquire