;›; heap defs for malloc and pmalloc›;››;›; C variable (char * )_himem.  contains pointer to next piece of›; mem unallocated.›;›  .globl  __himem›__himem:›  .word  __FREEMEM  ; defined by linker, top of executable››;›; C variable (memblock * )_freelst.  contains head of linked list›; of blocks of mem that have been freed›;›  .globl  __freelst›__freelst:›  .word  0    ; nil to start with›;›; that's all for here.  see pmalloc.c and malloc.c for code that uses them›;›