HP HP-65 - Page 4

4. Display
Controlling Display. To display x, rounded to
n fixed decimal places, press BRg [+ [n] (where
n—=20,1,...,9). To display x in scientific
notation, rounded to n places, press BEg [n]. =
Display can also be set by a program. Blinking
Display. = Blinking display occurs when an
illegal operation is attempted (Example: 5 — 0).
Depressing any key stops the blinking without
doing the key function. = Blinking occurs when
a program card is misread (or blank). = See the
Key Dictionary for the limitations on the follow-
ing: [n], [Lod), (], [sw], [cog], [oms+ ],
(cowms], [=oct], [, 5], B . Multiple
Decimal Points. The display also indicates low
battery power (all decimal points light up).
5. Prefix Operations
Performing ‘“Gold” Functions (Upshift). Rule:
Prefix gold function keys by il to do the func-
tion or [ to do the inverse. = Example: Cal-
culate log (100) = 2 by pressing 100 [l .
= Example: Calculate antilog (2) = 100 (the
inverse) by pressing [ [LOc]. Performing “Blue”
Functions (downshift). = Prefix blue function
keys by [@l. = Example: Calculate 5! = 120 by