Compucorp 342 Statistician
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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Compucorp 342 Statistician
The Compucorp 342 Statistician, a member of Compucorp's early family of elegant, superbly built handheld calculators, is a statistics-oriented scientific calculator with an 80-step program memory. It is otherwise identical to the Compucorp 344, a calculator with twice the program memory.
As I've said elsewhere, these calculators are engineering marvels in the truest sense. Built before large-scale custom MOS integrated circuits became available, the compact package contains a stack of five circuit boards, each densely packed with (mostly bipolar) ICs. The machine's power consumption is phenomenal for a machine this size; it is actually comparable to the power consumption of today's notebook computers. This is due, in part, to its beautiful Panaplex display that requires an anode voltage in excess of 200 Volts to operate. Because of its power consumption, when not used with the external power adapter, these machines requires four high-capacity size "D" NiCd cells to operate.
Power consumption aside, I continue to be inspired by these machines' beauty. They are no-compromise devices: everything just feels rightabout them, the keyboard, the display, the way arithmetic and scientific functions are implemented. I suspect that if someone made a modern calculator by simply reducing a Compucorp model in size, it'd be a real success among scientists and engineers.
The Gamma function program example I wrote for the 322 can be used without alteration on the 342. Here it is again, reproduced for completeness. To use this program, you must also populate registers 4-9 with constant values:
M4=√2π M5=68.82784822 M6=755.9596084 M7=4151.488796 M8=11399.36541 M9=12520.43913 01 STn 02 2 03 STn 04 3 05 1 06 + 07 RCLn 08 2 09 = 10 STn 11 × 12 3 13 = 14 STn 15 × 16 3 17 = 18 STn 19 × 20 3 21 = 22 STn 23 × 24 3 25 = 26 STn 27 × 28 3 29 + 30 . 31 5 32 ax 33 ( 34 - 35 2ND 36 5 37 ) 38 ÷ 39 2ND 40 ex 41 × 42 ( 43 RCLn 44 4 45 × 46 RCLn 47 2 48 + 49 RCLn 50 5 51 × 52 RCLn 53 2 54 + 55 RCLn 56 6 57 × 58 RCLn 59 2 60 + 61 RCLn 62 7 63 × 64 RCLn 65 2 66 + 67 RCLn 68 8 69 × 70 RCLn 71 2 72 + 73 RCLn 74 9 75 ) 76 ÷ 77 RCLn 78 3 79 = 80 STOP