Texas Instruments TI-60X

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
Years of production:   Display type: Alphanumeric display  
New price:   Display color: Black  
    Display technology: Liquid crystal display 
Size: 6"×3"×½" Display size: 12 characters
Weight: 4 oz    
    Entry method: Formula entry 
Batteries: 1×"CR-2032" Lithium Advanced functions: Trig Exp Hyp Lreg Ab/c Cplx Cmem BaseN Units 
External power:   Memory functions: +/-/×/÷/^ 
I/O:      
    Programming model: Formula programming 
Precision: 13 digits Program functions:  
Memories: 12(0) numbers Program display: Formula display  
Program memory: 96 program steps Program editing: Formula entry  
Chipset:   Forensic result:  

Texas Instruments TI-60X

ti60x.jpg (24741 bytes)The model number would suggest that this Texas Instruments calculator is a variant of the TI-60. In reality, however, the TI-60X looks like a "light" version of the TI-68. The memory capacity is smaller, and a few features are missing, but most features are identical, and the appearance of the two machines is very similar.

One particularly odd thing about this calculator is its display: a low resolution dot matrix is used, character cells are 4 pixels wide and 5 pixels high. Because of this, numbers appear rather blocky, as seen in the picture to the right.

The formula programming model of this calculator is identical to that of the TI-68, with one minor difference: only 12 letters of the alphabet (A-I, X-Z) are available for naming variables and formulae. Formula programming is demonstrated by this implementation of Stirling's formula: 

F=(X+1) yxX×√(2×π×(X+1))÷ e^(X+1)×(1+1÷12÷(X+1))