HP-15C
Clearing Data
←
RUN mode: Deletes either the last digit during number entry or the
entire X-register in case number entry has been
terminated.
PRGM mode: Delete the currently displayed program step
CLEAR ∑
Clear stack and summation registers 0-5
CLEAR PRGM RUN mode: Set program counter to 000
PRGM mode: Erase entire program memory
CLEAR REG Clear all storage registers
CLEAR PREFIX Clear prefix key and briefly display all 10 digits of the mantissa
CL X RUN mode: Clear X-register
PRGM mode: Store the CLX command as a program command
Storage Registers & Indirect Addressing
STO 0-9, .0-.9 Store X in the specified storage register.
By default, 20 registers are available
STO + 0-9, .0-.9
STO – 0-9, .0-.9
STO x 0-9, .0-.9
STO ÷ 0-9, .0-.9
Register store arithmetic: Register OP X → Register.
RCL 0-9, .0-.9 Recall number from storage register to X-register
RCL + 0-9, .0-.9
RCL – 0-9, .0-.9
RCL x 0-9, .0-.9
RCL ÷ 0-9, .0-.9
Register recall arithmetic: X OP Register → X.
X↔ 0-9, .0-.9
Exchange X with one of the storage registers
STO I Store X in index register
STO +–x÷ I
Register store arithmetic with index reister
RCL I Recall value from index register
RCL +–x÷ I
Register recall arithmetic with index reister
X↔ I
Exchange X with index register
STO (i) Store X in the register pointed to by I.
Values of I and corresponding registers:
0-9 → R0-R9, 10-19 → R.0-R.9, 10 → I
STO +–x÷ (i)
Perform indirect register storage arithmetic
RCL (i) Recall value from the register pointed to by I
X↔ (i)
Exchange X with the register pointed to by I
FIX I, SCI I, ENG I Use the index register to specify the number of digits
RCL ∑+ Recall ∑x and ∑y from the summation registers into X & Y
LST X Recall last value of X-register as it was before the previous operation
STO A-E Used to enter elements in matrices, see Matrix Operations
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