Texas Instruments TI-62 Galaxy
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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Texas Instruments TI-62 Galaxy
Although its appearance may suggest otherwise, the TI-62 appears to be a close relative of a very different-looking Texas Instruments calculator, the TI-57 LCD. Relative, yes: identical, definitely not! The TI-62 is in fact a much improved version, addressing many of the deficiencies of the TI-57 LCD model.
More memory, for starters: programs can be up to 100 steps long, if all but one memory registers are converted into program usage. Conversely, a 42-step program can coexist with 10 memory registers. Since the programming model is fully merged, this makes the TI-62 a respectable machine.
Then there's a bigger, semi-alphanumeric display that is used to show program steps in mnemonic form. It can also displays 10-digit numbers with a two-digit exponent.
The keyboard is also a great improvement: the TI-57 LCD had that hideously stiff, bouncy keyboard that Texas Instruments inexplicably used in several of their early LCD calculators. (This was corrected when the TI-57 II was released, but the TI-62's "Galaxy" style keyboard is still better.)
Overall, the TI-62 gives the solid feel of a well designed, solid, useful algebraic programmable. Maybe that explains why it is no longer in production?
The example program I wrote for the TI-62, implementing the Gamma function, is not particularly efficient: it uses a copious amount of program steps and several number registers to compute the Lanczos-approximation. The fact that such a "wasteful" program fits easily into the TI-62's memory confirms that this is indeed a respectable machine.
STO 1: 2.506628283501 STO 2: 92.20704845211 STO 3: -83.17763708287 STO 4: 14.80283193078 STO 5: -0.2208497079533 LBL G 00 STO 0 01 EXC 2 02 ÷ 03 EXC 2 04 + 05 RCL 1 06 + 07 RCL 3 08 ÷ 09 1 10 ST+ 0 11 RCL 0 12 + 13 RCL 4 14 ÷ 15 1 16 ST+ 0 17 RCL 0 18 + 19 RCL 5 20 ÷ 21 1 22 ST+ 0 23 RCL 0 24 = 25 lnx 26 + 27 ( 28 RCL 0 29 - 30 3 31 . 32 5 33 ) 34 × 35 ( 36 RCL 0 37 + 38 . 39 8 40 5 41 ) 42 STO 0 43 lnx 44 - 45 RCL 0 46 = 47 RTN 48