HP-41CV
ARCL
Append the value of the data register nn to the ALPHA register. A data
register or a stack register can hold at most
6 characters
. Note that if ALPHA
data is stored in a data or stack register the ALPHA mode of the data will be
preserved. An error occurs if a numerical function is executed on ALPHA
data.
See RCL for indirect addressing modes.
ASHF
Shift ALPHA register 6 characters to the left. Left 6 characters are lost
ASIN
Inverse Sine using current trigonometry mode
ASN
Assign a function or program to an arbitrary key for use in USER mode:
“ASN ALPHA <func name/program name> ALPHA <key>”. Or
“ASN ALPHA <func name/program name> ALPHA SHIFT <key>” in which
case “SHIFT <key>” executes the command.
To undo the assignment: “ASN ALPHA ALPHA [SHIFT] <key>”
See also command LBL for top-row auto-execution
ASTO
Store leftmost 6 characters of the ALPHA register in data register nn. See
RCL for indirect addressing modes. See ARCL for more information on
ALPHA data
ATAN
Inverse Tangent using current trigonometry mode
AVIEW
Display the ALPHA register until a key is pressed
BEEP
Play a fixed short melody
BST
PRGM mode: Go to previous program step.
RUN mode: Go to previous program step but do not execute any commands.
CAT
CATALOG list functions:
CAT 1:
Global program labels. Global programs are separated by END
instructions. Press PRGM to edit the currently listed program
CAT 2:
Functions in expansion modules
CAT 3:
Built-in functions
CAT 0, 4-9: Same as CAT 3
R/S halts the listing, SST shows next entry, BST shows previous entry.
See RCL for indirect addressing modes
CF
Clear flag nn. See RCL for indirect addressing modes. Flags are:
00-10: General purpose flags where flags 0-3 are shown in the LCD display.
Can be set/reset by the user
11-29: Special purpose flags. Can be set/reset by the user. Those sometimes
have a special meaning:
11:
Automatic Execution Flag. If set the HP-41C automatically begins
executing the current program whenever the calculators turned on
14:
Card Reader Overwrite Flag. When set, flag 14 allows you to overwrite
write-protected cards with the optional card reader
21:
Printer Enable Flag. Printing is enabled when this flag is set
22, 23: Data Entry Flags. These two flags detect keyboard input. The
calculator sets flag 22 when numeric data is entered from the
keyboard and flag 23 when alpha data is entered. Both flags are
cleared each time calculator is turned on
24, 25: Range Error And Error Ignore Flags. That these flags control how the
HP-41C reacts to range errors and operating errors. If flag 24 is set
range errors are ignored and numbers such as 9.999999999x1099
are returned in place of errors. Flag 24 remains set until you clear it. If
flag 25 set other errors are ignored. Flag 25 is cleared each time an
error occurs
26:
Audio Enable Flag. When set tones are produced
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