Re: Accuracy by chance Message #7 Posted by Paul Dale on 8 Oct 2009, 7:02 p.m., in response to message #6 by Jeff O.
Those links are to a very old version of the project but most of the high level ideas haven't changed. There has been a bit of to and fro over the function set since this revision. Mostly new functions added. There have also been a lot of bug fixes and space savings.
The software isn't currently running on the 20b hardware but I can compile it for the arm and there is still sufficient space (RAM and flash) left to do the hardware driving that will be required (some of this is done already but more is required). Does anyone know where to source a programming cable from? Any space left over after that will be dedicated to more functionality and bug fixes :)
Highlights are still similar to what I wrote previously:
 500 merged programming steps.
 100 registers (+ stack X Y Z T L & I).
 HP41 like programming model.
 Almost all operations support complex numbers done like the 35s.
 Logical and bit operations are a superset of the 16c. Bases supported are from 2 to 16 inclusive, arithmemtic modes are unsigned, ones complement, twos complement and sign and mantissa.
 Comprehensive suite of statistical operations.
 Time, date and calendar operations (using the internal RTC for current time and date).
 Fraction mode as per the 32sii with a maximum denominator of 9999.
Walter's documentation change list might be helpful (some of the special characters here will like get mangled):
1.2 4.1.09 Added ASRN, CBC?, CBS?, CCB, SCB, FLOAT, MIRROR, SLN, SRN, >BIN, >DEC, >HEX, >OCT, BETA, D>R, DATE, DDAYS, D.MY, M.DY, Y.MD, CEIL, FLOOR, DSZ, ISZ, D>R, R>D, EMGAM, GSB, LNBETA, LNGAMMA, MAX, MIN, NOP, REAL, RJ, W and WINV, ZETA, %+ and %; renamed the top left keys B, C, and D, and bottom left EXIT.
1.3 17.1.09 Added AIP, ALENG, ARCL, AROT, ASHF, ASTO, ATOX, XTOA, AVIEW, CLA,PROMPT (all taken from 42S), CAPP, FC?C, FS?C, SGMNT, and the …# commands; renamed NBITS to BITS and STOWS to WSIZE; specified the bit commands closer; deleted the 4 carry bit operations.
1.4 10.2.09 Added CONST and a table of constants provided, D>J and J>D, LEAP?, %T, RCL and STO 􀁣 and 􀁤, and 2 forgotten statistics registers; deleted CHS, EMGAM, GSB, REAL and ZETA; purged and renamed the bit operations; renamed many commands.
1.5 5.3.09 Added RNDINT, CONV and its table, a memory table, the description of XEQ B, C, D to the operation index, and a and ge to the table of constants; put CLSTK on a key, moved CLΣ and FILL, changed the % and log labels on the keyboard, put CLALL in X.FCN; checked and cleaned alpha mode keyboard and added a temporary alpha keyboard; rearranged the alphabet to put Greek after Latin, symbols after Greek consistently; separated the input and non programmable commands; cleaned the addressing tables.
1.6 12.8.09 Added BASE, DAYS+, DROP, DROPY, E3OFF, E3ON, FC?F, FC?S, FIB, FS?F, FS?S, GCD, LCM, SETDAT, SETTIM, SET24, SINC, TIME, VERS, αDAY, αMONTH, αRC#; %Σ, as well as F, t, and χ2distributions and their inverses; reassigned DATE, modified DENMAX, FLOAT, αROT, and αSHIFT; deleted BASE arithmetic, BIN, DEC, HEX, and OCT; updated the alpha keyboards; added flags in the memory table; included indirect addressing for comparisons; added a paragraph about the display; updated the table of indicators; corrected errors.
1.7 9.9.09 Added P.FCN and STAT catalogues, 4 more conversions, 3 more flags, Greek character access, CLFLAG, DECOMP, DENANY, DENFAC, DENFIX, Iβ, IΓ, αDATE, αRL, αRR, αSL, αSR, αTIME, 12h, 24h, fraction mode limits, normal distribution and its inverse for arbitrary μ and σ, and Boolean operations working within FLOAT; deleted αROT and αSHIFT, the timer, and forced radians after inverse hyperbolics; renamed WINV to W –1, and beta and gamma commands to Greek; added tables of catalogue contents; modified label addressing; relabeled PRGM to P/R and PAUSE to PSE; swapped SHOW and PSE as well as Δ% and % on the keyboard; relabeled Q; corrected CEIL and FLOOR;
There have been a number of changes since the 1.7 documentation. Mostly extra statistic distributions  currently, normal(0,1), normal(mean,var), chi^2, t, F, geometric, Weibull, binomial, poisson & exponential both cumulative distribution functions and their inverses.
The operations that aren't supported in complex mode are those that don't make sense, those that won't fit on the stack (regularized incomplete beta function), the integer mode only commands and a couple of other functions: error function and regularized incomplete gamma function  but not the normal gamma function. Complex stack and STO/RCL operations are supported, e.g. there is a complex lastX which restores L & I to the stack.
I can send the source to those interested I guess. I really should create a project on the web to host this.
 Pauli
