CrOsborne Currency Exchange Calculator Installation instructions: EXCHANGE.ZIP is an archive file containing four files: EXCHANGE.OPA - the Psion application. EXCHANGE.DBF - an initial data file to get you started. EXCHANGE.RSC - Psion help file. RDMEEXCH.TXT - these instructions. Use WinZip and PsiWin (or whatever other means you normally use) to extract the files. Copy EXCHANGE.OPA to a directory called \APP on any Psion drive. Copy the data file EXCHANGE.DBF to the \DAT directory on the internal memory disc. The Help file EXCHANGE.RSC can optionally be installed in the \OPD directory. If you leave it out you can still enter registration details but other help functions will not work. On the Psion system screen postion the cursor to the right of where you want the icon for Exchange to appear (I suggest next to the Calc icon) and select Menu - Apps - Install  (press Psi-I). Exchange.opa should appear in the list, select it. Finally you might like to assign the Ctrl+Calc button combination to give you a shortcut to the application: position the cursor under the Exchange icon which has appeared on the system screen, select Menu - Apps - Assign button (or press Psi-A) and you can choose a shortcut key combination. Operation of the program should be self evident; if in doubt refer to the help file. The program has only been extensively tested on a 1Mb Psion 3a - there are almost certainly undiscovered bugs and problems - if you are first to find and report one I'll try and fix it and get a new version to you. No warranty is given or implied - you should always back up your data regularly, use of the program is entirely at your own risk. (I use it regularly on my Psion without problems). Text version of the help file: ======================================================= Currency Exchange ======================================================= Quick Keys Change country left: PsiQ right: PsiP Set sterling rate left: PsiA right: PsiL PsiS: swap left and right country Exchange rates PsiD: set direct (non-sterling) exchange rate PsiC: calculate rate from sterling rates PsiF: reset to rates from data file PsiE: edit data file EXCHANGE.DBF Memory functions - arrow keys PsiUp / PsiDn: select memory to use PsiRight: save to memory PsiLeft: recall from memory Psi+ / Psi-: add / subtract to memory Psi*: multiply result by memory. PsiR Registration Info PsiX Exit programme ======================================================= Memories Eight memories are available and are shared with the Psion Calculator application as M0 to M7. Use the arrow keys with the Psion key (Psi) to select the memory and store or recall numbers. Psi+ adds the current result to the current memory Psi- subtracts from the current memory the result Psi* multiplies the result by the current memory This last option is useful if you are converting prices which do not include state tax. Store the tax rate in a memory (eg enter M0=1.06 in PsiCalc for a 6% rate) and press Psi* after each conversion to add the tax. Results transfered to memory can be accessed in PsiCalc by entering the memory name (M0 to M7) in calculations. ======================================================= Currency Data File The country and currency details are stored in a Psion Data file called M:\DAT\EXCHANGE.DBF. If the data file is not found a new file will be created containing UK, Germany and USA only with default values for the exchange rates. PsiE allows you to edit the data file, you can also use the Psion Data application to edit the file. For each country the currency name, symbol (prefix or suffix) for the currency, and exchange rate to the pound are stored. Only the first five fields of each record are used by Exchange Calculator - you can add additional fields to store extra info if you wish, they will be ignored by Exchange. ======================================================= Exchange Rates Currency exchange rates are stored in the data file as rates to the UK Pound. When converting between two non-UK currencies the rate is calculated from the two UK rates. This calculation can be overridden by setting a direct rate from the menu or key PsiD. PsiA or PsiL allows you to set a new exchange rate to the pound for the displayed currencies. When you alter the rate you can optionally save it to the data file. PsiC recalculates the rate from the current pound rates PsiF resets the rates to those in the data file. Conversions are displayed rounded to 2 decimal places but are calculated using floating point precision. ======================================================= Program startup Until registered ExchangeCalculator always starts up set to convert Germany DMarks to Pounds Sterling at a rate of 3.00. Once the program has been registered, it restarts in the same state it was last used. NB This includes restoring any conversion rates in use but not saved in the file. Press PsiF to get back to the rates from the data file. ======================================================= Preferences File Entering a valid registration code creates a file M:\OPD\EXCHANGE.PRF. As well as the user details this file contains the current setup (countries, rates, and default memory). The setup is restored when the programme is restarted. If EXCHANGE.PRF is corrupted or deleted the registration details will have to be re-entered. Please keep a note of your registration name and key. ======================================================= Help File This help file is M:\OPD\EXCHANGE.RSC. It was created with Jezar at Psion's Help Compiler kit. If you are short of space delete it. You will still be able to access the Help-About and Registration dialogs. ======================================================= About Exchange Calculator CrOsborne Currency Exchange Calculator for the Psion 3a is copyright (c) Roger Creagh-Osborne,1998. Exchange Calculator is Shareware for individual use, registration costs £10UK or $20US. Current version is 3.1 dated July 1998 For latest version check http://www.crosborne/demon.co.uk/psion.htm Multiple licence enqires welcome, contact by eMail: roger@crosborne.demon.co.uk ======================================================= Registration You can register CrOsborne Currency Exchange online through RegNet (http://www.swregnet.com) Alternatively send £10 (Ten pounds UK) cash or money order payable to: Roger Creagh-Osborne at Colloggett Cottage, Landulph, Saltash, Cornwall, PL12 6ND, UK. Specify your Psion username to be displayed on screen. Registration key can be returned by email or post - please include your return address. ======================================================= Author & Programme Roger Creagh-Osborne, CrOsborne Systems, Cornwall. eMail: roger@crosborne.demon.co.uk Exchange was written in OPL for the Psion 3a, it should also work on Psion 3c. A Psion5 version is in preparation.