Rabbit 2000 - Page 12

8 Rabbit 2000/3000 Microprocessor
ALTD, I/O and Flags Table Keys
Table 2: ALTD (“A” Column) Symbol Key
Table 3: IOI and IOE (“I” Column) Symbol Key
Table 4: Flag Register Key
Flag
Description
F R SP
•
ALTD selects alternate flags
•
ALTD selects alternate destination register
•
ALTD operation is a special case
Flag
Description
SD
•
IOI and IOE affect destination
•
IOI and IOE affect source
S Z L/V C Description
•
Sign flag affected
-
Sign flag not affected
•
Zero flag affected
-
Zero flag not affected
L
LV flag contains logical check result
V
LV flag set on arithmetic overflow result
0
LV flag is cleared
•
LV flag is affected
•
Carry flag is affected
-
Carry flag is not affected
0
Carry flag is cleared
1
Carry flag is set