Sharp PC-1500

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: 3½"×8"×1" Display size: 26 characters
Weight: 16 oz    
    Entry method: Formula entry 
Batteries: 4×"AA" alkaline Advanced functions: Trig Exp Cmem Snd 
External power: 6VDC   Memory functions:  
I/O: Printer/cassette port     
    Programming model: BASIC 
Precision: 13 digits Program functions: Jump Cond Subr Lbl Ind  
Memories: 1850(0) bytes Program display: Text display  
Program memory: 1850 bytes Program editing: Text editor  
Chipset:   Forensic result: 8.99998153428  

pc1500.jpg (32757 bytes)Its bulk suggests that the PC-1500 is an earlier model than that classic Sharp BASIC programmable calculator, the PC-1211. However, its display suggests otherwise: the PC-1211 used an early, yellow LCD display, while the PC-1500 has a modern, gray display.

Why is it so bulky, then? I can only speculate. To be sure, it has a memory expansion port that the PC-1211 lacks, and it also has a more functional I/O port.

The programming model of the two machines is very similar (indeed, many later Sharp BASIC machines utilized a very similar BASIC implementation.) The biggest drawback is the lack of keyboard shortcuts: whether in immediate mode or program entry mode, all BASIC keywords must be spelled out by hand on the small QWERTY keyboard.

The machine's programming model is illustrated by the following example, computing the logarithm of the Gamma function to high precision:

20:Z=ABS X
50:G=LN(G+(.011468489+5.435E-10)/(Z+4))+(Z-.5)*LN (Z+4.65)-Z-4.65
60:IF X>0THEN 90
80:G=LN (π/X/SIN (π*Z))-G