break \*- set program break
sets the system's idea of the lowest location not used by the program
(rounded up to the next multiple of 64 bytes).
and below the stack pointer
are not in the address space and will thus
cause a memory violation if accessed.
From C, the calling sequence is different;
more bytes are added to the
program's data space and a pointer to the
start of the new area is returned.
When a program begins execution via
highest location defined by the program
Ordinarily, therefore, only programs with growing
The c-bit is set if the program requests more
memory than the system limit
or if more than 8 segmentation
registers would be required to implement the break.
From C, \*-1 is returned for these errors.