thanks a lot every body
i have seen the table and i have some questions about it:
1- here we added 0F + 7F, in the table why we start from 7F,
..Thats one of the numbers you wanted to add
what about 0F?
2- why we start with 0 digit directly after 7F why not 81 and then continue?
Because 7Fh is a positive number.
If you add "1" to 7Fh you get 80h, not 81h
3- in the notes its written that (as a signed number,8EH represent -114,
In the 8Eh value, bit 7 [ the sign bit ] is SET, so it represents a negative value.
which is clearly not the correct result of 142; therefor, the OV bit is set) can you explain me this please
thanks