toto funguje, mrknu na to tvoje…
[code];odcitani 2 16bit cisel
;c1 - mensenec, C2 mensitel, vysledek v c1
c1_l DATA 30h
c1_h DATA 31h
c2_l DATA 32h
c2_h DATA 33h
ORG 0000H
start: mov c1_l, #low 7940
mov c1_h, #high 7940
mov c2_l, #low 7265
mov c2_h, #high 7265
;------------------- ;odecteni spodnich bytu
clr c
mov A, c1_l
subb A, c2_l
mov c1_l, A
mov A, c1_h ;odecteni hornich bytu s vypujckou ze spodnich
subb A, c2_h
mov c1_h, A
sjmp $
end[/code]
EDIT: to tvoje chodi taky, v cem je problem?
[code]
ORG 0000H
start:
mov r4, #low 7940 ;0x1F04
mov r5, #high 7940
mov r2, #low 7265 ;0x1C61, k prenosu pri odcitani dojde
mov r3, #high 7265
acall xxx
sjmp $
xxx:
clr c
xch a,r4
subb a,r2
xch a,r5
subb a,r3
xch a,r5
xch a,r4
ret
end[/code]