Kernel Functions

The following tables contain codes for kernel functions.
They work as normal functions, expecting parameters to be passed in reverse.
To call one of these you can use their name or hex code (call.k memory_size).

Memory Management Functions

HEX	Prototype	Description
50	memory_grow(p: nat)	Grows the memory by p pages.
54	memory_shrink(p: nat)	Shrinks the memory by p pages.
51	memory_size(): nat	Returns the memory size in bytes.
2A	memory_page(): nat	Returns the page size in bytes (hardware dependent, usually 4KB).
25	memory_pages(): nat	Returns the number of allotted pages.
C0	memory_copy(d: *, s: *, n: nat)	Copies n bytes from source s to destination d.
70	memory_load(d: *, s: [*], n: nat)	Loads n bytes from code address s to destination d.
00	memory_zeros(p: *, n: nat)	Writes 0 to p, for n consecutive bytes.
F1	memory_fill(b: byt, p: *, n: nat)	Fills p with b, for n consecutive bytes.
C2	memory_compare(a: *, b: *, n: nat): int	Compares n bytes of a, b. Returns first different byte or -1

The usage of unowned memory will cause a bad access fault resulting in a immediate crash. If a function were to fail, it would set the flag register. You can move the flag register on the stack with the flag instruction which also resets it.