HP 15C User Manual (English)

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HP-15C

LBL 0-9, .0-.9, A-E Insert label

GT0 0-9, .0-.9, A-E RUN: Set program counter to the specified label

PRGM: Insert a GTO instruction

GSB 0-9, .0-.9, A-E RUN: Execute the program starting at the given label

PRGM: Insert a GSB instruction. A maximum of

seven

subroutine

calls can be nested

Flags There are 10 flags, 0-7 are user flags. Flag 8 & 9:

8: Complex flag. Automatically set when complex mode is activated.

To deactivate complex mode explicitly clear this flag. Indicated by

"C" in the display. See section Complex Numbers

9: Overflow flag. Automatically set by an overflow condition (result

≥1E100). Causes the display to blink. If the overflow occurs

during program execution the program continues using a value of

9.99...E99 and the display blinks when the program finally stops.

Cleared by CF9 or pressing "←". Can be used to provide

program-controlled visual feedback.

SF n: Set flag n, CF n: Clear flag n

F? n: Execute next step if flag is set, skip next step if flag is clear

TEST comparisns Only two comparisn are directly available on the keyboard:

X≤Y, and X=0

Others must be entered using the TEST n command:

0: X≠0 1: X>0 2: X<0 3: X≥0 4: X≤0

5: X=Y 6: X≠Y 7: X>Y 8: X<Y 9: X≥Y

If camparisn is false: Skip the next program step

If camparisn is true : Execute the next program step

ISG 0-9, .0-.9, I Increment and skip if greater.

This loop command uses the specified register which must contain a

value in the form nnnnn.xxxyy where:

±nnnnn: Current (initial) loop counter value

xxx: Comparisn value for loop counter

yy: Loop counter increment (or decrement for DSE), if y=0

then 1 is used instead

ISG first increments n by y and then compares the new n to x:

If n>x the next program step is skipped

If n≤x the next program step is executed

Ie. if initially I=0.023 then the loop will run from 0 to 22 (or 1 to 23)

DSE 0-9, .0-.9, I Decrement and skip if equal (or smaller).

DSE first decrements n by y and then compares the new n to x:

If n≤x the next program step is skipped

If n>x the next program step is executed

GTO I Jump to the label indicated by the I register. Only the integer part of

I will be used! Values of I and associated labels:

I≥0: 0...9 → LBL 0...LBL 9, 10...14 → LBL A...LBL E

I<0: Jump to the line number indicated by the absolute value of I.

Ie. if I=–5.3 the jump will go to line number 5.

GSB I Perform subroutine call to the label indicated by the I register

PSE Halt program for about 1 second and display the X-register

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HP 15C Specifications

General

Memory registers	65
Storage media type	-
Type	Scientific
Cover	No
Form factor	Pocket
Control type	Buttons
Product color	Black, White
Housing material	Plastic
Digits	10 digits
Display type	LCD
Display number of lines	1 lines
Battery type	CR2032
Power source	Battery
Auto power off	Yes
Auto power off after	5 min
Number of batteries supported	2