=> R0 = buffer
R1 = size of buffer
R2 = lowest char allowed
R3 = highest char allowed
R4 = flags and character to output in bottom byte (if bit 30 set)
<= R0 corrupted
R1 = chars read, excluding Return
R2 corrupted
R3 corrupted
R4 preserved
C set if Escape
This SWI reads a line from the current input stream. Input is terminated with Return, Ctrl-J or Escape. Delete and Backspace deletes last char entered. Ctrl-U empties buffer.
When the buffer is full, each successive attempt to enter a character results in a Ctrl-G 'beep'.
The CallASWI module (version 0.03) allows this SWI to be used with RISC OS pre 5.00.
See PRM 1, page 910.
OS_ReadLine flags
Bit Meaning if set
31 Echo only characters entering buffer
30 Echo character in bottom 8 bits of R4 (password style)
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