HP 49G Series: Update of 48G Exmath

10152017, 09:38 AM
Post: #21




RE: HP 49G Series: Update of 48G Exmath
Having dug out my 48G I see that the key changes date back to that model.
In the oldest version of Exmath I have, I guess with no changes from the original, number entry is via the A key  Can someone with a 48G & the original Exmath library please check? 

10152017, 11:28 AM
Post: #22




RE: HP 49G Series: Update of 48G Exmath
Updated documentation, should appear on
http://www.hpcalc.org/ shortly: This library, number 1538, name EXMATH, is an update of Francisco Saenz' programme for the 48G series, now modified to work on 48gII, 49G, 49g+ & 50g. There are 3 versions for the various models: 49G, OS 1.196 uses EXMAT196.LIB Size 6867.5 CkSum 3DA0 49G, OS 2.107 EXMATH49.LIB Size 6867.5 CkSum 3DA0 48gII, OS 2.08 EXMATH49.LIB 49g+ & 50g OS 2.107 EXMAT50g.LIB Size 6890 CkSum B2B5 The two 49G versions are NOT the same. Some functions have been added, mostly their names will be selfexplanatory. The function BEST takes two arguments from the stack Number G with fractional part Maximum denominator H of fractional approximation & returns the answer integer numerator integer denominator in stack levels X & Y, this being the best approximation to G below denominator H. I believe the original for this programme was written by the ubiquitous Joe Horn. The two functions P159 (Ramanujam's method) & P261 (Euler) return the number of partitions for integer input, the first more quickly & less accurately for large values of input. CHANGES IN KEYBOARD ACTIVATION 1. Entering numbers is now accomplished through Right Shift F1 which then demands a mantissa & then an exponent. 2. Exit from Exmath through Right Shift F6. 3. SWAP is allocated to Right Cursor Key. Francisco Saenz' original documentation is included, operation is as he describes with above exceptions. 

10302017, 08:50 AM
Post: #23




RE: HP 49G Series: Update of 48G Exmath  
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