.sect .text; .sect .rom; .sect .data; .sect .bss; .sect .text
.define __brk
.define xbrk
__brk:
mov bx,sp
mov ax,2(bx)
mov cx,sp
sub cx,128
jbe 1f
mov bx,(.limhp)
mov (.limhp),ax
sub ax,bx
jbe 2f
call xbrk
2:
xor ax,ax
ret
1:
mov ax,0xc
jmp cerror
xbrk:
push di
mov di,bx
mov cx,ax
shr cx,1
repz stos
jae 3f
stosb
3:
pop di
