OS_Byte 138 (changes)

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Programmer's OS Reference SWI Manuals Calls

» Part OS_Byte 15 – SWI Calls

» OS_Byte 138OS

OS_Byte 138

(SWI &06)

Use

The purpose of this call is to insert a byte into a buffer.

Notes

While inserting 9 bytes into the mouse buffer you must disable interrupts to prevent a real mouse transition from being entered into the middle of your data.

Note that characters 0 and 128-255 are inserted into the keyboard buffer as two bytes 0,n to distinguish them from function keys – if you are inserting strings into the keyboard buffer you should be careful to check for top bit set characters and preceed them with a 0 byte, else you may erroneously insert function key keypresses – ‘Ì’ is equivalent to pressing F12, ‘ü’ to pressing Control, Shift F12, which in the desktop will respectively generate a CLI prompt, and initiate desktop shutdown.

See also

• Buffer Numbers
• OS_Byte