Signed
From Sonic Retro
Revision as of 11:01, 13 October 2004 by Ss is testing (talk | contribs) (Negatives do start at $80, but $80 equals -$80, not -$7F.)
Revision as of 11:01, 13 October 2004 by Ss is testing (talk | contribs) (Negatives do start at $80, but $80 equals -$80, not -$7F.)
When using the signed hexadecimal number system in programming (such as 68000 assembly), the values $80 to $FF are interpreted as -$80 to -$01 respectively. This is simpler than actually prefixing a number with the minus symbol "-".
Conversely, the unsigned number system has no negatives. So $81 is read simply as $81.