Ibico 098
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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Ibico 098
This Ibico 098 is yet another one of a line of calculators from many different manufacturers utilizing the Sharp LI3301A calculator circuit. I already have at least thirteen such machines in my possession, and I fully expect that there'll be more, models I don't know about yet, which use the same chip.
The programming model of this chipset is primitive, but its biggest drawback, in my opinion, is that questionable "feature" of zeroing out the X-register when a program is about to be entered. What this means, in effect, is that no algorithm that fails for an argument of zero can be entered. You wish to enter a program that computes the logarithm of a number? No such luck... the logarithm of 0 is undefined and causes an error condition, so your program will not be entered into memory.
Or perhaps the makers of this chipset assumed that all programs will be "prompting" programs, as opposed to operating on the contents of the display register?
Oh well. The limited programming model means no Gamma function on this machine. Here is, instead, an implementation of Stirling's formula:
MS 1 M+ ÷ MR ÷ 1 2 - 3 6 0 1/x / MR / MR x2 + 1 = × MR yx MR ÷ MR ex × ( 2 × π ÷ MR ) √ =