Function 63 - work with the debug board.

The debug board is the global system buffer (with the size 512 bytes), to which any program can write (generally speaking, arbitrary) data and from which other program can read these data. By the agreement written data are text strings interpreted as debug messages on a course of program execution. The kernel in some situations also writes to the debug board information on execution of some functions; by the agreement kernel messages begins from the prefix "K : ". For view of the debug board the application 'board' was created, which reads data from the buffer and displays them in its window. 'board' interpretes the sequence of codes 13,10 as newline. A character with null code in an end of line is not necessary, but also does not prevent.
Because debugger has been written, the value of the debug board has decreased, as debugger allows to inspect completely a course of program execution without any efforts from the direction of program itself. Nevertheless in some cases the debug board is still useful.

Write byte

Parameters: Returned value: Remarks:

Read byte

Takes away byte from the buffer.
Parameters: Returned value: