Texas Instruments TI-95
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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*Peripherals include the PC-324 printer and the CI-7 cassette interface cable.
Texas Instruments TI-95
Appearances can be deceiving. Despite the similarities to many hand-held BASIC language programmable calculators (in particular, to Texas Instrument's own TI-74), the TI-95 is actually a sophisticated, but conventional keystroke programmable calculator. The machine has plenty of memory, expandability through its ROM/RAM cartridge port and proprietary I/O port. Somehow, though, it still feels like an odd contraption; I don't really know why, maybe it's just that a QWERTY keyboard and a keystroke programming model just feel like a mismatch to me.
My favorite programming example, the Gamma function, is not really an appropriate one for this machine; not only does its built-in factorial function calculate the extended factorial for non-integers, a true Gamma function is also available as part of the Mathematics ROM cartridge. So instead, I wrote a program for the incomplete Gamma function, which is the example presented here. To use the program, hit RUN, PGM, enter the integration limit, hit x~t, enter the argument, and hit GMA.
000 'Incomplete Gamma' 016 DFN F1:GMA@AA 023 HLT 024 LBL AA 027 STO 002 030 x~t 031 STO 001 034 y^x 035 RCL 002 038 / 039 RCL 001 042 INV 043 LN 044 / 045 RCL 002 048 = 049 STO 003 052 LBL QQ 055 STO 000 058 RCL 003 061 * 062 RCL 001 065 / 066 ( 067 RCL 002 070 + 071 1 072 ) 073 STO 002 076 + 077 STO 003 080 RCL 000 083 = 084 IF> 000 087 GTO QQ 090 RTN