=> R0 = 11 (Set temporary filing system)
R1 = pointer to wildcarded filename
<= R0 preserved
R1 = updated to point beyond filing system specifier
R2 = -1 no filing system specifier present (call has no effect)
>= 0 filing system to restore
R3 = pointer to special field, 0 if not present
This SWI sets the temporary filing system from the prefix string in R1. It is used by OS_CLI to set the temporary filing system for the command's duration. After the command the current filing system is restored with OS_FSControl 19
For example:
R1 in points to Registers out
blah.blah vlsgf R1 = R1 in
R2 = -1
R3 = 0
<FS>:blah R1 past ':'
R2 = number of <FS>
R3 = 0
<FS>#fred:blah R1 past ':'
R2 = number of <FS>
R3 past '#'
<path>:blah R1 = R1 in
R2 = -1
R3 = 0
<path>#fred:blah R1 = R1 in
R2 = -1
R3 past '#'
#fred:blah R1 = R1 in
R2 = -1
R3 past '#'
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