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filenum 16-bit signed integer by value (required)
Contains the file number of the target devicefile as returned by FOPEN (or HPFOPEN).
controlcode 16-bit signed integer by value (required)
A code that specifies the control operation to be performed. The codes used for asynchronous device control are listed below. With the exception of controlcode = 1, which sends a carriage control directive to a device, these controls apply only to terminals.
1 Sends a carriage control directive to the device.
4 Sets a read timeout value for the next read.
10 Changes the line speed of a device. Both input and output speed are affected.
11 Changes the line speed of a device. Both input and output speed are affected.
12 Enables character echoing.
13 Disables character echoing.
14 Disables the system break function.
15 Enables the system break function.
16 Disables the subsystem break function.
17 Enables the subsystem break function.
22 Obtains the time required for the last read to complete.
23 Disables parity checking.
24 Enables parity checking.
25 Defines additional end-of-record (AEOR) character for terminal input.
26 Disables Binary Mode.
27 Enables Binary Mode.
28 Disables User Block Mode.
29 Enables User Block Mode.
34 Allows printing of !!! when the line deletion character is entered.
35 Prevents printing of !!! when the line deletion character is entered.
36 Defines parity setting.
37 Sets both terminal type and speed.
38 Sets terminal type.
39 Determines current terminal type.
40 Determines current speed setting.
41 Enables transparent editing.