.sect .text; .sect .rom; .sect .data; .sect .bss
.sect .text
.define .trp
.define .stop
.extern .trppc

		! ax is trap number
.trp:
	xor     bx,bx
	xchg    bx,(.trppc)
	test    bx,bx
	jz      2f
	push    ax
	call    bx
	pop     ax
	ret
2:
	call    .stop

.stop:
	int     3