Jameco Electronics Rabbit 3000 - Manual (Page 270)

User’s Manual 261
21. I
NSTRUCTIONS IN
A
LPHABETICAL
O
RDER
W
ITH
B
INARY
E
NCODING
Spreadsheet Conventions
ALTD (“A” Column) Symbol 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
IOI and IOE (“I” Column) Symbol Key
Flag Description
b IOI and IOE affect source and destination
d IOI and IOE affect destination
s IOI and IOE affect source
Flag Register Key
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 signif-
icant 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 L/V flag contains logical check result
V L/V flag contains arithmetic overflow result
0 L/V flag is cleared
* L/V flag is affected
* Carry flag is affected
- Carry flag is not affected
0 Carry flag is cleared
1 Carry flag is set