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These products have solvers. The types of solvers are explained in detail below. -80A TVM4 -70A TVM4 -22A TVM4 -27A TVM4 -25C TVM4 -92A TVM5 -38E TVM5 -34C root finder, numerical integrator -37E TVM5 -38C TVM5 -12C TVM5 -15C root finder, numerical integrator -18C algebraic -28C RPL28 -17B algebraic, w/LG (undocumented) -19B algebraic, w/LG -27S algebraic, w/LG -28S RPL28 -22S alg22 14B TVM5 (plus additional pre-programmed equations) -42S RPN42 -10B TVM5 17BII algebraic, w/LG 19BII algebraic, w/LG 48SX RPL48 32SII RPN32 48S RPL48 48G RPL48 48GX RPL48 38G equation 38G+ equation 48G+ RPL48 49G RPL48 30S 39G 40G 10Bii TVM5 9G ?? 9S ?? 12CPt TVM5 49G+ RPL48, TVM5 17BII+ ?? 33S RPN32 39G+ HP Solve 48GII ?? 19BII+ ?? 40GS 12CPA TVM5 39GS ?? 50G ?? 35s ? ------------------------------------------------------------ alg22: You use EQUATIONS to select current equation or LIBRARY to select a built-in equation. Press SOLVE. You are presented with a menu of the variables that appear in the equation. Press one to select which variable to solve for. You will be prompted for values to use for the other variables. The prompt works by showing: L?value where "L" is the name of the variable being prompted for and "value" is its current value. You can simply press INPUT to re-use the value, or enter an expression and press INPUT to use the calculated value. ------------------------------------------------------------ Algebraic: This solver is similar to TVM5, except that it has been generalized to handle any equation. <name> stores the value in the variable STO <name> stores the value in the variable <name> (2nd in a row), solves for the variable RCL <name> recalls a value from the variable The solvers on the 17BII, 19B, 19BII, and -27S also have L(et) and G(et) functions. The solvers on the -17B, 17BII, -18C, 19B, and 19BII do algebraic simplification: this feature was removed from the -27S in order to save space. The solver on the 17BII / 19B / 19BII is the best one of the set. ------------------------------------------------------------ equation Similar to algebraic, except that a different interface is used. ------------------------------------------------------------ HP Solve Similar to algebraic, except that a different interface is used. Maybe they'll finally stop fiddling with the user interface. ------------------------------------------------------------ RPL28: Similar to algebraic, except that different keystrokes are used: <value> stores the value in the variable <value> '<name>' STO stores the value in the variable Shift-<name> solves for the variable '<name>' RCL recalls a value from the variable '<name>' EVAL recalls a value from the variable and evaluates it ------------------------------------------------------------ RPL48: As with RPL28, it is similar to algebraic but different keystrokes are used: <value> stores the value in the variable <value> '<name>' STO stores the value in the variable <\ <name> solves for the variable /> <name> recalls a value from the variable '<name>' RCL recalls a value from the variable '<name>' EVAL recalls a value from the variable and evaluates it ------------------------------------------------------------ RPN32: Similar to alg22. Press EQN to select the equation or FN= <letter> to select an RPN program, then SOLVE <letter> to solve it for the specified variable. Prompting is the same as for alg22. If you are solving an RPN program, use RCL <letter> to indicate variables that participate in solving. You use R/S instead of INPUT to indicate that you are done with the value. ------------------------------------------------------------ RPN42: Your program starts with a global label, then a series of MVAR <name> instructions, one for each variable that will appear in the menu. It then recalls each variable as needed to obtain the value. You invoke the solver by pressing SOLVE <name>. It then brings up a menu similar to the algebraic solver. <name> stores the value in the variable STO <name> stores the value in the variable <name> (2nd in a row), solves for the variable RCL <name> recalls a value from the variable ------------------------------------------------------------ TVM4: This solver does the "four value" TVM functions. While there are five named financial registers, you can only use the values in three of them to solve for a fourth. An extra bit is stored with each register to record whether it has a value. You thus have to store a zero to actually mean a zero. The valid combinations are: input solve for n i PMT FV and/or PV n i FV PV and/or PMT n i PV FV and/or PMT i PMT PV n i PMT FV n i PV FV n n PV FV i n PV PMT i n FV PMT i i n PV INT Operations: <name> stores the value in the register <name> (2nd in a row), solves for the register ------------------------------------------------------------ TVM5: This solver is the standard "five value" TVM function. You can enter any combination of four values and solve for the fifth. The value in the register that you are solving for is used as an initial guess, if required. Operation: <name> stores the value in the register <name> (2nd in a row), solves for the register RCL <name> recalls a value from the register ============================================================ From "HP Handhelds History -- Solvers Part 3" by Wlodek Mier-Jedrzejowicz in DATAFILE V22 N1 p17, January/February 2003 Type: - TVM: Time Value of Money - root: root finder Vars: - keys: labels on dedicated keys - labels: labels in display - menu: menu labels in display - list: variables listed in display Year Models Type Vars Nature 1973 -80A TVM keys Time Value of Money; n i PMT PV FV -81A keys below display. Works in programs -22A on programmable models. -27A -92C -37E -38E -38C -12C 1974 programs for various various Financial solvers and root finders were -65A and later available in HP Pacs and written by users for programmable models. 1979 -34C root Root-finder function that looks for the -15C "zero" of an expression entered as a -41C advantage module program. 1979 -14A ROMS root Math, PPC, Standard modules had root finder programs. 1979 -14A ROMS TVM labels Financial Decisions, Home Management, Standard modules had TVM programs. 1982 -75C Math ROM root This was a function for use by Basic -75D Math ROM programs. 1984 -71B Math ROM root Function to be used in Basic programs, works recursively. 1984 -71B Solver solver labels Chris Bunsen's original general root program, finder program usign the -71B Math Circuit Analysis ROM Pac. Used in the Circuit Analysis PAC. 1984 -71B Finance ROM TVM Finance program. 1986 -18C solver menu First generation built-in solver to -17B analyze an expression, display its -19B variables, select and solve for an -27S unknown variable with an interface as 17BII on TVM models. "Expressions" were 19BII algebraic equations or expressions and could include tests and loops. Allows Let and Get functions. This version tries to find a direct solution by rearranging the expression before looking for a numerical root. 1987 -28C solver menu Second generation general solver, works -28S with expressions and programs, so does not look for a direct solution. Must press Shift key before key of variable to be solved for. 1988 -22S sovler list Simplified equation solver, variable names only one letter long. No rearranging, nor tests or loops. 1988 -32S solver list Simplified general solver for RPN programs. 1988 14B TVM keys Algebraic model with TVM. -10B 10BII 1988 -42S solver menu General solver for RPN programs. 1989 -20S root Solver program, not a function. 1989 -21S TVM Finance program, not a function. 1990 48SX solver menu -28C solver, extended by the Equation 48S Library card. 1991 32SII solver list -32S solver extended to work with equations, too. 1991 95LX solver menu The same solver as on the -18C, 100LX rewritten to work on these DOS 200LX palmtops. Integrated to work with 700LX Lotus 1-2-3 as a "back solver." Let and Get are described in the manual. 1991 OmniBook 300, solver menu or Same solver as on the palmtops above, 425, 430 list integrated into a Windows environment. Get and Let do not work. 1993 48GX solver menu or 48SX solver extended and with option to prompt for the variables. 48G list 48G+ 1995 38G solver list 48GX solver transferred to these 38g+ teaching models. 39G 40G 40GS 1995 OmniGo 100, 120 TVM keys -12C emulator provides a TVM solver. 1999 49G solver list 48GX solver, menu option hidden at 30 MENU

Areas

- hp01a (HP-01A)
- hp6s (HP6S)
- hp6ssolar (HP6S Solar)
- hp8s (HP8s)
- hp9g (HP9G)
- hp9s (HP9S)
- hp10a (HP-10A)
- hp10b (HP-10B)
- hp10bii (HP10BII)
- hp10c (HP-10C)
- hp10s (HP10s)
- hp11c (HP-11C)
- hp12bii (HP-12BII)
- hp12c (HP-12C)
- hp12cpa (HP12CPA)
- hp12cpt (HP12CPt)
- hp14b (HP14B)
- hp15c (HP-15C)
- hp16c (HP-16C)
- hp17b (HP-17B)
- hp17bii (HP17BII)
- hp17bii+ (HP17BII+)
- hp18c (HP-18C)
- hp19b (HP-19B)
- hp19bii (HP19BII)
- hp19bii+ (HP19BII+)
- hp19c (HP-19C)
- hp20s (HP-20S)
- hp21a (HP-21A)
- hp21s (HP-21S)
- hp22a (HP-22A)
- hp22s (HP-22S)
- hp25a (HP-25A)
- hp25c (HP-25C)
- hp27a (HP-27A)
- hp27s (HP-27S)
- hp28c (HP-28C)
- hp28s (HP-28S)
- hp29c (HP-29C)
- hp30s (HP30S)
- hp31e (HP-31E)
- hp32e (HP-32E)
- hp32s (HP-32S)
- hp32sii (HP32SII)
- hp33c (HP-33C)
- hp33e (HP-33E)
- hp33s (HP33S)
- hp34c (HP-34C)
- hp35a (HP-35A)
- hp35s (HP35s)
- hp37e (HP-37E)
- hp38c (HP-38C)
- hp38e (HP-38E)
- hp38g (HP38G)
- hp38g (HP38G+)
- hp39g (HP39G)
- hp39g+ (HP39G+)
- hp39gs (HP39GS)
- hp40g (HP40G)
- hp40gs (HP40GS)
- hp40g+ (HP40G+)
- hp41c (HP-41C)
- hp41cv (HP-41CV)
- hp41cx (HP-41CX)
- hp41opt1 (HP-41OPT1)
- hp42s (HP-42S)
- hp45a (HP-45A)
- hp46a (HP-46A)
- hp48g (HP48G)
- hp48gii (HP48GII)
- hp48gx (HP48GX)
- hp48g+ (HP48G+)
- hp48s (HP48S)
- hp48sx (HP48SX)
- hp49g (HP49G)
- hp49g+ (HP49G+)
- hp50g (HP50G)
- hp55a (HP-55A)
- hp56a (HP-56A)
- hp65a (HP-65A)
- hp66a (HP-66A)
- hp67a (HP-67A)
- hp70a (HP-70A)
- hp71b (HP-71B)
- hp75c (HP-75C)
- hp75d (HP-75D)
- hp80a (HP-80A)
- hp81a (HP-81A)
- hp83a (HP-83A)
- hp83f (HP-83F)
- hp85a (HP-85A)
- hp85b (HP-85B)
- hp85f (HP-85F)
- hp86a (HP-86A)
- hp86b (HP-86B)
- hp87a (HP-87A)
- hp87xm (HP-87XM)
- hp91a (HP-91A)
- hp92a (HP-92A)
- hp94d (HP-94D)
- hp94e (HP-94E)
- hp94f (HP-94F)
- hp95c (HP-95C)
- hp95lx (HP95LX)
- hp95lx1mb (HP95LX1MB)
- hp97a (HP-97A)
- hp97s (HP-97S)
- hp100lx (HP100LX)
- hp100lx2mb (HP100LX2MB)

General

- Bibliography and addresses
- HP48S* \-notation
- HP Handheld Users' Conferences
- Date of introduction
- Evolution chart
- Various feature summaries
- Information file overview
- Information summary
- HP Journal articles
- Displaying 7-segment letters
- LIF file formats
- Product numbers llist
- Names and code names
- Math problems
- Jeff Brown's additional Q&A
- RPN introduction
- Serial numbers
- Series summaries
- Solver comparison
- Blank template
- A timeline of the "firsts"
- Timing tests
- HP48SX virus
- "wall of fame."
- Wlodek Mier-Jedrzejowicz articles

Craig's Articles

- Anatomy of an Application
- An ApLet for the 38G
- The Collect-94 Development System (PDF) Datafile, Vol 11 No 3
- The Collect-94 Language (PDF) Datafile, Vol 11 No 5
- Day Number Routines Using Integer Arithmetic
- Freyja - An Emacs for the HP95LX (PDF) Datafile, Vol 11 No1
- Gotos on the HP48SX (PDF) Datafile, Vol 10 No 8
- The HP-94: A Posthumous Review
- The HP-94 Story - Audax Corporation (PDF) Datafile, Vol 11 No 6
- Initial Impressions of the Aurora FN 1000 Financial Manager
- An Inside View of HHUC-95
- Notes on the CHIP Meeting
- Notes on the 1992 HP Handheld User's Conference
- A Phase-of-the-Moon Program for the 32SII
- Some Thoughts on the HP-95LX
- Other Article List

Last modified Tuesday, 2021-05-11T16:33:00-05:00.