Indirect branching, which allows the contents of a memory register to be used as the target of a branching instruction (GTO or XEQ) is omitted from the HP 35s. In RPN mode, these registers are used to hold values for computations. Equations may be embedded in programs, as a single program step. In algebraic mode, these registers hold results from previous calculations. Level X appears on the lower line of the display and level Y on the upper line. In RPN mode, it uses a four-level stack, as have all HP's non-graphing RPN calculators since the earliest days. xref Two vectors of similar dimensions may be added and subtracted, and multiplied to give their dot product. Numbered flags may be set to specify which of three denominator systems is to be used: most precise denominator, factors of the maximum (for example 2, 4, 8, 16, when the maximum is 16), or a fixed denominator. The HP 35s (F2215A) is a Hewlett-Packard non-graphing programmable scientific calculator. The HP 33s had only label addressing. The indirect variables are allocated automatically; storing a non-zero value in one results in the allocation of all variables with sequence numbers up to and including the one specified. 0000100578 00000 n The HP 35s has been given a retro look reminiscent of classic HP calculators from the 1970s to the 1990s. They can be decomposed using the ABS (radius r) and ARG (angle Θ) functions. The key to this is the RPN memory stack, in which the … However raising x to the power of 0.5 using the yx key works if the number is entered as a real number with a complex part equal to zero. 0000001521 00000 n The calculator's settings include a numbered flag which specifies whether equations in programs are to be evaluated or displayed at run time. Vectors can also be used to simply store up to three real numbers together, thereby increasing the calculator's storage capacity, though with more complexity and reduced speed. endstream endobj 248 0 obj <>/Size 232/Type/XRef>>stream The user can clear all indirect variables above a specified number, with the CLVARx function. For example, the sequence 3.15.16 →cm converts ​3 15⁄16 inches to 10.0 cm (approximately). The primary differences are: HP has released a free-of-charge 35s emulator for the Windows operating system (and Wine). Regardless of which display base is set, non-decimal numbers must be entered with a suffix indicating their base, which involves three or more extra keystrokes.[2]. Since the content of an equation is not validated unless and until it gets processed, it may contain any sequence of characters, including text strings. 0000004016 00000 n "Equations" in this context means expressions ( f(x,...) ), equalities ( f1(x,...) = f2(x,...) ), and assignments (y = f(x,...)), which are each handled in different ways. For example, adding 12 + 34i and 56 + 78i involved the following keystrokes: 34↵ Enter12↵ Enter78↵ Enter56CMPLX+, which used up all four stack levels.[15]. 0000002808 00000 n The existing values of the other variables are used, unless the program contains INPUT instructions to make the program prompt for a value. The above example of adding 12 + 34i and 56 + 78i then becomes: 12i34↵ Enter56i78+. [9] Working with hexadecimal and other non-decimal bases has been criticised as requiring excessive and unintuitive keystrokes. There are no functions to directly extract the parts of the displayed fraction. The faceplate is metal, bonded to the plastic case. The 35s supports both RPN and algebraic entry modes. Six bitwise operations are available: AND, OR, XOR, NOT, NAND, and NOR. Systems of two equations with two variables, and three equations with three variables, are supported. However, it provides far more functions, processing power, and memory than most of those earlier models. 0000006947 00000 n Since complex numbers and vectors of up to three elements can be stored as a single value, each data variable occupies 37 bytes, enough for a type indicator and three floating-point numbers.[4]. 0000003500 00000 n Useful to insert a single REGX, Y, Z or T instruction for a RCL stack register step. All programs are stored in one continuous program space, and may be created and edited by switching to programming mode, using the PRGM key. <]>> ", "HP 35s scientific calculator - User Guide", "Tear Down: Scientific calculator boils design down to two ICs", "Review: HP 35s Programmable Scientific Calculator", American Society for Engineering Education, "HP 33s Scientific Calculator User's Guide", "HP 35s: Indirect register data packing program", "Programming and Working with Indirectly Addressed Memory on the HP 35s", https://en.wikipedia.org/w/index.php?title=HP_35s&oldid=976151367, Creative Commons Attribution-ShareAlike License, 158 × 82 × 18.2 mm (6.22 × 3.23 × 0.72 in), Start with the number 1 placed in stack register X, Recall N (memory), placed in X the stack moves up and then multiply two lowest stack registers, End of program - result is in x (stack) and displayed, Over 800 memory registers (26 directly labelled), Operation in decimal, binary, octal, hexadecimal, Equation solver with arbitrary variable isolation (first seen on the, Support for input and display of fractions, Unit conversions and table of physical constants. Here is a sample program that computes the factorial of an integer number from 2 to 69 (ignoring the calculator's built-in factorial/gamma function). 0000000668 00000 n In keeping with the calculator's retro theme, conversions between Imperial/US units and the equivalent standard metric units feature prominently on the 35s's keypad. The 35s's statistics capabilities are fairly standard. 0000002730 00000 n RPN-mode programs are usually smaller and faster.[4]. Within the program space, up to twenty-six alphabetic labels may be defined in the form LBLA, and each label may be followed by up to 998 other steps, so that any step may be targeted by a GTO ("go to") or XEQ ("execute") instruction in the form A123 (or just A for the label step itself, A001). The HP 35s uses an operational stack of four registers, called X, Y, Z and T and LASTx. Two small arrow symbols on the display indicate if the actual value is slightly above or below that displayed. HP have published program code for the 35s which enables this.[17]. For example, in the US, it is the most powerful programmable calculator approved for use in the Fundamentals of Engineering (FE) and Principles and Practice of Engineering (PE) examinations.[14]. Programmable scientific calculator produced by Hewlett-Packard, List of Hewlett-Packard products: Pocket calculators, "How rare is the 35s Anniversary Edition? On the 35s, the number of functions able to handle complex numbers is limited and somewhat arbitrary. In non-decimal bases, the word length is fixed at 36 bits, and uses two's complement negation. Program execution can be interrupted or resumed by pressing the R/S ("run/stop") key, and the program step pointer can be moved using the ↑ and ↓ keys. The calculator may be set to automatically display values as mixed fractions by toggling the FDISP key. There is no connection between program labels and the variables of the same names. The entry mode can be easily changed by the user.