HP CALCPAD 100 MANUAL
HP CALCPAD 100 SOFTWARE

The HP-65 was one of the first calculators to include a base conversion function, although it only supported octal (base 8) conversion. For example, f followed by 4 would access the sine function, or g followed by 4 would calculate 1 / x ).įunctions included square root, inverse, trigonometric (sine, cosine, tangent and their inverses), exponentiation, logarithms and factorial.

In addition to the 'normal function' printed on the key's face, a 'gold' function printed on the case above the key and a 'blue' function printed on the slanted front surface of the key were accessed by pushing the gold f or blue g prefix key, respectively. Each of the keys had up to four functions. The HP-65 introduced the 'tall', trapezoid-shaped keys that would become iconic for many generations of HP calculators. The documentation for the programs in the calculator is very complete, including algorithms for hundreds of applications, including the solutions of differential equations, stock price estimation, statistics, and so forth. The magnetic program cards are fed in at the thick end of the calculator under the LED display. That is one reason for the tapered depth of the calculator. Like all Hewlett-Packard calculators of the era and most since, the HP-65 used Reverse Polish Notation (RPN) and a four-level automatic operand stack.īill Hewlett's design requirement was that the calculator should fit in his shirt pocket. It also included a magnetic card reader/writer to save and load programs. Introduced by Hewlett-Packard in 1974 at an MSRP of $795 (equivalent to $4,368 in 2021), it featured nine storage registers and room for 100 keystroke instructions. The HP-65 is the first magnetic card-programmable handheld calculator.

HP CALCPAD 100 SOFTWARE

The HP-34C came in a number of variants, such as plastic- and metal-keyboard versions and those with soldered (later 1983 variants) vs pressure-mounted circuitry (earlier variants 1979–83).HP-65 in original hard case with manuals, software 'Standard Pac' of magnetic cards, soft leather case, and charger As such they were sold side-by-side for a number of years. This price difference allowed those with economic constraints to still buy a high-end HP (HP-34C) scientific programmable within a reasonable cost.

The calculator was superseded, in 1982, by the HP-15C.Īlthough it is argued the HP-41C (introduced late 1979 and only a matter of months after the HP-34C) was a replacement for the HP-34C, they were in fact differentiated as much by price (the HP-34C being 50% that of the HP-41C) as by functionality and performance (the HP-41C being the first HP LCD-based and module-expandable calculator, with its standard functionality lacking the root-finding and integration capabilities as well as the gamma-function implementation of the HP-34C though). A game of blackjack was easily programmable by converting some of the registers to lines of program. The winner was announced via calculator spelling by turning the display upside down and the words BLISS or I'LOSE (55178 or 3507,1) were displayed. This made the calculator probably one of the first pocket game computers ever invented.

HP CALCPAD 100 MANUAL

The HP-34C shipped with an 'applications' manual that included two games (Moon Rocket Lander and Nimb).

Programming features such as indirect jumps provided substantial capability to the calculator's programmer. The common method of converting registers to program memory allowed the calculator a maximum of 210 program steps. The user would usually programmatically recall the root value from a storage register to improve its precision. This technique for multiple root-finding is referred to as 'deflation'. Multiple roots are found using the technique of first finding a root, then dividing the equation by (1 - root value), thus driving the solution of the equation away from the root at that point. Integration and root-finding worked by having the user input a formula as a program. Significant to the HP-34C calculator was the capability for integration and root-finding (a first for any pocket calculator).

Hp calcpad 100