Jameco Electronics Rabbit 3000 - Manual (Page 257)

248 Rabbit 3000 Microprocessor
Spreadsheet Conventions
ALTD (“A” Column) Symbol Key
IOI and IOE (“I” Column) Symbol Key
Flag Register Key
Flag Description
f ALTD selects alternate flags
fr ALTD selects alternate flags and register
r ALTD selects alternate register
s ALTD operation is a special case
Flag Description
b IOI and IOE affect source and destination
d IOI and IOE affect destination
s IOI and IOE affect source
S Z L/V *
* The L/V (logical/overflow) flag serves a dual purpose—
L/V is set to 1 for logical operations if any of the four
most significant bits of the result are 1, and L/V is reset to
0 if all four of the most significant bits of the result are 0.
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 contains 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