Radio Shack PC-3
| 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 |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Radio Shack PC-3
Third in a series of pocket computers released by Tandy/Radio Shack under their store brand name, the PC-3 is yet another Sharp BASIC programmable calculator (the PC-1250 if I am not mistaken). Whereas the PC-2 was a bulky beast, with the PC-3 Radio Shack opted for a small size: the PC-3, along with the PC-8, are the tiniest pocket computers ever released under their brand name.
These machines were small, shirt-pocket size, but not very convenient to use. The inability to invoke common scientific functions with the touch of a button is a serious omission!
The programming model of the PC-3 is demonstrated by this high-accuracy implementation of the Gamma function:
10:INPUT X 20:Z=ABS X 30:G=2.506628275+6.3E-10+(225.5255846+1.9E-8)/Z-(268.2959738+4.1E-8)/(Z+1) 40:G=G+(80.90308069+3.5E-9)/(Z+2)-(5.007578639+7.1E-10)/(Z+3) 50:G=LN(G+(.011468489+5.435E-10)/(Z+4))+(Z-.5)*LN (Z+4.65)-Z-4.65 60:IF X>0THEN 90 70:RADIAN 80:G=LN (π/X/SIN (π*Z))-G 90:PRINT G,EXP G
