Difference between revisions of "Signed"
From Sonic Retro
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[[Category: Hacking Information]] | [[Category: Hacking Information]] | ||
| − | When using the signed hexadecimal number system in programming (such as [[68000]] assembly), the values '''$ | + | When using the signed hexadecimal number system in programming (such as [[68000]] assembly), the values '''$80''' to '''$FF''' are interpreted as '''-$7F''' 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'''. | Conversely, the '''unsigned''' number system has no negatives. So '''$81''' is read simply as '''$81'''. | ||
Revision as of 03:30, 13 October 2004
When using the signed hexadecimal number system in programming (such as 68000 assembly), the values $80 to $FF are interpreted as -$7F 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.