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Updated LN and Checksums Table for Surveying Solutions for the HP-35s Calculator

Home > Help Center > Updated LN and Checksums Table for Surveying Solutions for the HP-35s Calculator

2/28/2016 - Now that HP-35S checksums are kind of fixed, we thought we'd provide an updated table for page 15P of the Fourth Printing of the book. Please note that LNs are also different for programs G and Z. The values on this page are correct.

Quickest Verification: On a new calculator, total PGM memory free after entry should be 20,468. Checking this value is the fastest way to verify that the programs are all on the calculator, though it gives less confidence about entry correctness than checking individual LNs and much less than checking individual checksums. To access this value press Yellow Arrow, Down Arrow, and look under 2 PGM.

Please remember that checksums can only be expected to match if all of the following conditions are met:
  • You have a newer calculator (manufactured in at least 2015.)
  • Your calculator was brand new or was reset to new condition prior to entry.
  • You enter the programs in the following order: A (pg. 2), B (pg. 3), D (pg. 4 and 6), X (pg. 34), pages 1P-14P in order, Z on page 14P. Order of entry is essential!
IMPORTANT: Some entry errors seem to affect checksum calculations even after they are corrected. If you receive a calculator with a checksum mismatch, this is likely the cause. We review such programs at least 2 times, but since we have no reliable checksum, it is still possible for there to be missed typos. Errors, if any, should come out when you go through the examples in the book. If you find mistakes, troubleshooting tips on page 44 will help you correct them.

Program

LN

Checksum

Note

A

73

17B0

B

95

75E3

C

1209

1210

Through C189: LN=792, Checksum: 5CD4

D

80

51DA

E

188

97F9

G

1294

F248

Through G120: LN=572, Checksum: 720D

H

177

78B2

I

786

60FF

Through I101: LN=411, Checksum: 4C67

K

171

A1FE

L

118

3984

P

116

8E61

Also OK: 8C61

S

84

CD7B

T

246

02CC

V

279

2731

X

93

95B9

Z

42

33C6

Also OK: 5B16

Other Fourth Printing Errata

  • C186 and C188 are flipped in the left (entered view) column, but not in the right (key strokes) column. The key strokes column is correct.
  • Blank or D may appear instead of the UP arrow in programs A, B, and D.