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- LoanCalc V1.4
- =============
-
- Although there are many mortgage calculation programs available, all that
- I have seen are designed around 'fixed' mortgages, ie. mortgages that have
- a fixed payment due on a fixed date. As well as providing a printed
- Amortization Table for Fixed Mortgages with Monthly, Semi-Monthly, Bi-Weekly
- and Weekly payment schedules, (including a provision for making Lump Sum
- Payments), LoanCalc (LC) is designed to track 'Open' mortgages that allow
- any size payment to be made at any time.
-
- If you are looking for a program that will quickly give you payments or
- amortization periods of loans with fixed monthly payments, without the
- printed Amortization Table, I can heartily recommend MortCalc, written by
- Michel Laliberte, available on Fish 385. It will be easier to use for this
- purpose. The advantage of LC is the flexability to calculate repayment
- schedules for almost any timetable, the Lump Sum Payment option, the Open
- Mortgage option, and the ability to give you a printed Amortization Table.
-
- I apologize for the size of this program. Being a 'weekend' programer,
- my programing style could not be described as elegant. The program is
- written in BASIC, compiled with the HiSoft BASIC Professional compiler.
- To anyone out there who still programs with the AmigaBASIC interpreter -
- I admire your dedication. The frustration of it all was just too much for me.
- Look into HiSoft BASIC Professional, and put the joy back into programing.
-
-
- This version of LC supports both mouse and keyboard for most of its
- functions, the major exception of course being specific data which must
- be input (ie. payments, dates, etc), and it uses the ARP requester for the
- input of filenames. At any time, if the 'Esc' key is hit, then LC
- will escape from the data entry mode and return to the Main Menu.
-
-
- LC generally multitasks very well. While waiting for input, the program is
- 'sleeping', and therefore does not use up CPU time needlessly. However,
- you may occasionally get a "Device unavailable in module SOUND" error, which
- will abort the program. This is a problem with the HiSoft compiler - their
- SOUND command does not multitask well at all. I have tried to discuss this
- problem with the folks at MichTron, but they will not return phone calls,
- (I think it must be a company policy). At any rate, if you encounter this,
- closing other tasks will generally solve the problem.
-
-
- If LC is launched from Workbench, icons will be created for all '.data' files
- created, in case you would like to edit the file. These icons have no
- default tool, however, since I don't know which editor you would be using to
- edit the file. You can supply your own using the Workbench 'Info' Menu item.
-
- If launched from the CLI, no icons are created.
-
-
- While running, LC will request a directory and filename under which the
- program data will be kept. The default directory is RAM:, but you may
- specify any other. Two files will then be generated in that directory.
- One, 'Filename.data', will store all information regarding payments made,
- dates, interest paid, total interest, etc. The other, 'Filename.datavar',
- will store all the variables required by LC, which will vary from one session
- to the next. Copy these files to a disk for a permanent record.
-
-
- While entering data (especially data for Open Mortgages), there are lots of
- tiresome 'Are you sure?' type prompts. Although nobody likes them when
- the data is correct, they are useful in case of finger-trouble.
-
-
- -2-
-
- LC opens on the Main Menu, where there are 8 selections:
-
- 1. Start a New Mortgage/Loan File
- 2. Enter a Payment to an Existing Open-type File
- 3. Re-Calculate the Current Fixed-type Loan
- 4. View a Data File
- 5. Send a File to the Printer
- 6. Information
- 7. About
- 8. Quit
-
- Just Click on the appropriate item, or press the appropriate number
- on either number pad.
-
-
- Selection 1 should be made if you have not already opened a file under
- the proposed filename, for example 'FirstMortgage', and there is no
- 'FirstMortgage.data' and 'FirstMortgage.datavar' files in the specified
- directory. A file will then be built from scratch.
-
- The Open-type file will be built one entry at a time, using the data entered.
- This option is good for Open Mortgages, Line of Credit type loans,
- or any loan that does not have a Fixed repayment schedule.
- This file cannot 'think ahead', because it cannot predict when your payments
- will be made, or exactly how large or how small they will be.
- Once a data entry (payment) has been made, you have the option of making
- another (Press any key), totaling the file (Left Alternate-Shift-T),
- or returning to the Menu (Escape). Left Alternate-Shift-T merely prints
- a footnote to the file, stating your Total Payments so far and by how much
- the Principal was reduced, and then returns you to the Menu. It is intended
- to be used after the last payment is made, but may be used beforehand.
-
- The Fixed-type file will take all the parameters pertinent to your loan,
- and then display some summary information about your loan; ie. the Unit
- Payment (Installment), the Total Interest to be paid, the Actual (Effective)
- Interest Rate, and the Amortization Period. You may then Return to the Main
- Menu, Re-enter data, or request the Amortization Table. In the last case you
- will be prompted for the number of months you want the Table shown.
- The Amortization Table for that loan will be shown for any period
- from one month, up to the Amortization Period of the loan.
-
- If you are allowed to make lump sum payments to your Fixed loan, then run
- the Amortization Table for a number of months such that the last payment
- displayed is the date on which the lump sum payment is to be made,
- then use the 'L' option to show your Lump Sum Payment.
- The Principal reduction will be made on that date. Since all payments must
- be made in chronological order, once the Amortization Table has been
- displayed for a month beyond one in which you want to make a
- lump sum payment, you would have to go back to Selection 3,
- and re-select the number of months to display.
-
-
- Selection 2 should be made to enter more payments to an Open Mortgage/Loan
- file which has already been opened with Selection 1. Although there is a
- provision to make lump payments on a Fixed-type loan, that is not done using
- this Menu item. Note that if you are updating a file, the 'Filename.datavar'
- file must be situated in the same directory as the 'Filename.data' file.
-
-
-
-
-
-
-
- -3-
-
- Selection 3 is for Fixed-type loans only. If you have already entered the
- Mortgage/Loan parameters (Principal, Interest Rate, Commencement Date,
- Interest Compound Period and Filename), the LC will use these numbers,
- ask for confirmation, and request the Amortization Period/Monthly Payment.
- Any changes to these parameters may be made at this time.
- In this way, the same numbers can be quickly 'fiddled' to show various
- combinations of these variables. This feature cannot be used for Open-type
- loans for the reason mentioned above - Open loan payments cannot be predicted.
-
-
- Selection 4 will ask for the filename of the '.data' file you want to View.
- Select the path and 'Filename.data' from the requester.
- (The program will not accept any filename which does not end in '.data').
- You may then see the file almost exactly as it will look when printed
- using Selection 5 - (The printed version will be page formated).
- The data you will be looking at is the same data that was put on the screen;
- IF IT WASN'T ON THE SCREEN, IT WON'T BE IN THE DATA FILE. So if you want to
- see (or print) the whole Amortization Table in the data file, press <Return>
- when when prompted 'Amortization Table for how many months', so that
- the whole Table will be calculated and displayed.
-
- A text reader such as the enclosed View program would be ideal for looking at
- these files, as you may have noticed if you have examined the sample files
- enclosed with this program. However, I wanted the program to be completely
- stand-alone, and so opted to include the primitive forward-only viewer.
-
-
- Selection 5 will ask for the filename of the file you want printed.
- Select the filename as in the previous selection. The requested
- 'Filename.data' file will then be sent to the PRT: device.
-
-
- Selection 6 just recaps a bit of the information in this file, in case
- nobody reads it.
-
-
- Selection 7 tells you who to blame if something goes wrong.
-
-
- Selection 8 Exits the program, after confirmation.
-
-
-
- I have included woth this program 4 sample '.data' files to give you an idea
- of what your print-out will look like. The 4 files represent the same
- $100,000 mortgage, with an Interest Rate of 12.75%, amortized over 5 years,
- and includes one lump sum payment made on the second anniversary of the loan.
- One shows the Amortization Table if you had chosen to repay the mortgage
- with Monthly payments, another with Semi-Monthly payments, and the others
- with Bi-Weekly and Weekly payments.
-
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-
-
- -4-
-
- The INTEREST COMPOUND PERIOD
- ----------------------------
-
- Although LC will accept an I.C.P. of almost any frequency, the standard
- frequencies appear to be as follows, and should be used unless you know
- that your situation is different:
-
- Canadian Mortgages are compounded Semi-Annually.
- American Mortgages and both Canadian and American bank loans are compounded
- Monthly. Very few bank employees seem to know this - during my enquiries I
- got a lot of different answers, but the hard figures always came down to
- 'Monthly Compounded Interest". This information is also shown in the program.
-
-
- The PRINT-OUT
- -------------
-
- The 'Payment' date shown for each payment will depend on the type of
- Mortgage/Loan you select, as follows:
-
- Open Mortgages:
- will naturally show the payment on whatever date you enter.
-
- Fixed Mortgages:
- If you choose to make Monthly Payments, then the payments will be shown
- as due on the day of the month that the loan was taken out. So if you
- want payments due on the 1st of the month, show the loan as starting
- on the 1st day of the previous month.
-
- Semi-Monthly Payments are always shown as due on the 1st and 15th day
- of the month.
-
- Bi-Weekly Payments are shown as first due 14 days after the starting date
- of the loan, and due every 14 days thereafter.
-
- Weekly Payments are shown as first due 7 days after the starting date
- of the loan, and due every 7 days thereafter.
-
-
-
- REQUIREMENTS
- ------------
-
- Workbench 1.3 is required because of the math libraries.
-
- The arp.library is required because of the ARP requester.
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- -5-
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-
- LIMITATIONS
- -----------
-
- Some limitations of LC are:
-
- All Open Loan data entries MUST be in chronological order.
- (I just plain didn't know how to avoid this).
-
- Also with Open Loans, a data entry must be made every 6 months or so.
- This as necessary to keep the year-ends straight, so that LC knows which
- are leap-years. (The formula is slightly different in leap-years).
-
- There is a bug that seems to crop up every now and again.
- As LC is writing some information to a .data or .datavar file,
- a FILE ALREADY OPEN error will sometimes pop up. As all of my OPEN
- commands are immediately preceded by a CLOSE command on the same line,
- I am confused as to why this would happen. (A lot of YOU probably know,
- but I don't). At any rate, I built a RESET command into the
- Error Handler, which seems to work well enough to allow the file to be
- rebuilt from Menu Item 3, rather than have to start from scratch at
- Menu Item 1.
-
-
-
- ACCURACY
- --------
-
- To the best of my knowledge, this program is now as accurate as any other
- similar programs available. Monthly payment figures seem to agree with
- those found in commercial Amortization Tables.
-
-
-
- FILES INCLUDED WITH THIS PROGRAM
- --------------------------------
-
- LC LC.info
- LC.doc LC.doc.info
- Changes Changes.info
- Monthly.data Monthly.data.info
- Semi-Monthly.data Semi-Monthly.data.info
- Bi-Weekly.data Bi-Weekly.data.info
- Weekly.data Weekly.data.info
- View - the PD text reader by Bryan Ford (available on Fred Fish disk #163).
- arp.library V39.1 - in case there is still someone out there who is not
- utilizing this marvelous software. Just put it into
- your LIBS: directory, and leave it there.
-
-
-
- Hope someone finds this useful.
-
-
-
- Any comments, problems or bug reports are welcome. Please send to:
-
-
- Robert Bromley
- 4080 Longo Circle
- Malton, Ontario
- CANADA L4T 4C7
-