...
Output to the screen can be achieved by treating the screen as a device and using the file I/O system calls. However, there are six calls which can be used to send output to what is called standard output, which although it may be redefined by the CLI, see 'Standard I/O and the CLI', is usually the screen device. The calls are:
...
- OS_Out
...
- , write
...
- character
...
- to
...
- standard
...
- output
...
- OS_Nln
...
- , write
...
- newline
...
- to
...
- standard
...
- output
...
- (<CR><LF>),
...
- replace
...
- GN_Nln
...
- OS_Sout
...
- , write a string in local memory to standard output, replace GN_Sop
- OS_Bout, as OS_Sout,
...
- but
...
- from
...
- an
...
- extended
...
- address,
...
- replace
...
- GN_Soe
...
- OS_Pout
...
- , write an embedded string
...
- OS_Hout
...
- , write an hexadecimal value
These calls are fully compatible with GN_Sop, GN_Soe, GN_Nln. They are deprecated and maintained for compatibility. They perform a significantly slower rendering.
...