Police Quest 

To obtain a given item, simply change 
the listed offset to FF (see below):
ITEM                 OFFSET
Patrol Car Keys      967
Corvette Keys        96A
Cadillac Keys        96D
Radio Extender       970
Revolver             973
Ammunition           976
Briefcase            979
Note Book            97C
Pen                  97F
Ticket Book          982
Lytton Tribune       985
Wallet               988
Nightstick           98B
Loaded Revolver      98E
Hoffman File         991
Wanted Poster        994
White Suit           997
Trick Cane           99A
Hair Bleach          99D
Marked Money         9A0
Transmitter Pen      9A3
Room Key             9A6
No Bail Warrant      9A9
Handcuffs            9AC

Points are at offset 2B (plain ASCII value, I think)