Sharp EL-5510
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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Sharp EL-5510
It is not often these days that I get my hands on a "new" calculator that is more than just another trivial variation on a well known theme.
At first sight, the Sharp EL-5510 looks just like that, a variation on a theme. However, it is a somewhat unusual machine: it is the combination of a fairly standard BASIC-programmable hand-held computer and a financial calculator.
It is not supposed to be rare but it is; I have known about this model for years, but only recently did I actually obtain one. Mind you, "obtain" is probably the wrong word to use: I was not doing anything to make it happen, rather, it was Mike Sebastian who decided to send me this unit. Thank you, Mike!
Apart from the financial functions, it is pretty much as basic (no pun intended) model in Sharp's line of BASIC-programmable handheld calculators from the 1980s. Indeed, the financial functions appear to be a bit of an afterthought. Witness for instance this sentence from the manual: "For example, 'sin 30' may be entered either by operating [sin] 30 or [S] [I] [N] 30." Except that unlike most other models in Sharp's lineup which are scientific calculators, this machine does not have a [sin] key!
What it does have is a set of the usual financial functions for calculating compound interest, mortgage amortizations, and the like.
Very obviously, it also lacks an implementation of the Gamma function. Which allows me to introduce my usual programming example:
10:DATA 76.18009172,9.5E-9 20:DATA -86.50532032,-9.4E-9 30:DATA 24.01409824,8E-10 40:DATA -1.231739572,-4.5E-10 50:DATA 1.208650973E-3,8.7E-13 60:DATA -5.395239384E-6,-9.5E-16 100:INPUT "X=",X 110:T=1 120:IF X>=0 THEN 160 130:T=T*X 140:X=X+1 150: GOTO 120 160:G=1.9E-10+1 170:FOR I=1 TO 6 180:READ C,D 190:G=G+(C+D)/(X+I) 200:NEXT I 210:G=LN (SQR (2*PI)*G/X) 220:G=G-X-5.5+LN (X+5.5)*(X+.5) 230:PRINT EXP(G)/T