errcll:	; put return address into dx
	pop dx
errjmp:	call dmpdx
	xor ax, ax
	int 0x16
	int 0x19
dmpdx:	; setup bx and ah for int 10h call
	xor bx, bx
	mov ah, 0x0e
	mov cl, 4
	; this double-call is essentially a 4 times repeating loop
	call dmpdx1
dmpdx1:	call dmpdx2
dmpdx2:	; grab highest nibble from dx
	mov al, dh
	; remove highest nibble from dx
	shl dx, cl
	; shift away second-highest nibble that we accidentally copied
	shr al, cl
	; map 0-9 to ascii codes for '0' to '9'
	add al, 0x30
	; if result is larger than '9', ...
	cmp al, 0x3a
	jl dmpdx3
	; ... add 7 so we continue at 'A'
	add al, 7
dmpdx3:	int 0x10
	ret