Sanyo CZ-0911PG
Datasheet legend
Ab/c:
Fractions calculation
AC: Alternating current BaseN: Number base calculations Card: Magnetic card storage Cmem: Continuous memory Cond: Conditional execution Const: Scientific constants Cplx: Complex number arithmetic DC: Direct current Eqlib: Equation library Exp: Exponential/logarithmic functions Fin: Financial functions Grph: Graphing capability Hyp: Hyperbolic functions Ind: Indirect addressing Intg: Numerical integration Jump: Unconditional jump (GOTO) Lbl: Program labels LCD: Liquid Crystal Display LED: Light-Emitting Diode Li-ion: Lithium-ion rechargeable battery Lreg: Linear regression (2-variable statistics) mA: Milliamperes of current Mtrx: Matrix support NiCd: Nickel-Cadmium rechargeable battery NiMH: Nickel-metal-hydrite rechargeable battery Prnt: Printer RTC: Real-time clock Sdev: Standard deviation (1-variable statistics) Solv: Equation solver Subr: Subroutine call capability Symb: Symbolic computing Tape: Magnetic tape storage Trig: Trigonometric functions Units: Unit conversions VAC: Volts AC VDC: Volts DC |
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Sanyo CZ-0911PG
This is what I call an amazing find. Behind an unassuming German language listing on eBay hid a Sanyo programmable calculator that is unlike any other I've seen to date.
Superficially, it reminds me of the Commodore PR-100 but there are some crucial differences. On the negative side, this calculator has a lot fewer functions than the PR-100; no hyperbolic functions, no statistics, no probability, no coordinate conversions, no metric conversions. On the plus side, (and this is a huge plus!) the CZ-0911PG has a partially merged programming model; the second function [F] key is combined with the next keystroke as a single step in program memory. This makes a major difference when trying to squeeze complex algorithms into the calculator's limited program memory.
Another unusual feature of this calculator is its unique battery tray; the battery holder for four "AA" batteries can be removed in its entirety, to be replaced by a rechargeable battery pack. Very elegant.
The partially merged programming model of this calculator allows for a fairly accurate implementation of my programming favorite, the Gamma function. The program presented here calculates the natural logarithm of the Gamma function to at least 8 digits of precision for any real argument except for negative integers:
00 11 - 01 101 1 02 55 SM 03 101 1 04 106 6 05 64 x-y 06 11 - 07 106 6 08 80 = 09 62 +/- 10 52 M× 11 101 1 12 11 - 13 105 5 14 64 x-y 15 80 = 16 96 SKIP 17 93 GOTO 18 100 0 19 106 6 20 11 - 21 105 5 22 64 x-y 23 80 = 24 12 × 25 55 SM 26 100 0 27 40 ln 28 11 - 29 56 RM 30 101 1 31 40 ln 32 11 - 33 56 RM 34 100 0 35 10 + 36 81 ( 37 102 2 38 12 × 39 65 π 40 12 × 41 56 RM 42 100 0 43 82 ) 44 19 √ 45 40 ln 46 10 + 47 81 ( 48 103 3 49 105 5 50 17 1/x 51 13 ÷ 52 56 RM 53 100 0 54 18 x2 55 11 - 56 70 . 57 101 1 58 13 ÷ 59 56 RM 60 100 0 61 18 x2 62 10 + 63 103 3 64 13 ÷ 65 103 3 66 106 6 67 13 ÷ 68 56 RM 69 100 0 70 80 =