Ответ:
hex2bcd: ;hex to bcd conversion input r1:r2:r3:r4,output r2:r3:r4:r5 push xl push xh push yh push yl clr xl clr xh clr yl clr yh ldi r17,32 mov r5,r17 clr r17 hex2bcd_loop: rol r4 rol r3 rol r2 rol r1 rol yh rol yl rol xh rol xl dec r5 brne hex2bcd1 mov r2,xl mov r3,xh mov r4,yl mov r5,yh pop yh pop yl pop xh pop xl ret hex2bcd1: subi xl,-3 sbrs xl,3 subi xl,3 subi xl,-0x30 sbrs xl,7 subi xl,0x30 subi xh,-3 sbrs xh,3 subi xh,3 subi xh,-0x30 sbrs xh,7 subi xh,0x30 subi yl,-3 sbrs yl,3 subi yl,3 subi yl,-0x30 sbrs yl,7 subi yl,0x30 subi yh,-3 sbrs yh,3 subi yh,3 subi yh,-0x30 sbrs yh,7 subi yh,0x30 rjmp hex2bcd_loop