Simtel MSDOS - Coast to Coast/simteldosarchivecoasttocoast2.iso/calculat/hex_calc.zip/HEXCALC.DOC

Text File | 1991-01-08 | 36KB | 751 lines

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║                          HEX CALC DOCUMENTATION                         ║
║                                                                         ║
│                  Hex Calc Copyright (c) by Tom Cantlon 1991             │


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AutoManual    429  25498

CONTENTS

 1  Introduction········································  2971
 2     What You Need To Know····························  3065
 3     What You Get For Registering·····················  3696
 4     Features·········································  4845
 5     The Calculator···································  5502
 6     The Reference Aids·······························  5869
 7     Interaction With Programs························  6451
 8     The Three Versions·······························  8091
 9  Setup···············································  8653
10     Configuring Hex Calc·····························  8740
11     Installation·····································  9079
12  Operation···········································  9881
13     Basic Commands···································  9972
14     Calculator Commands······························ 13153
15        Adjust Answer································· 13254
16        Get # From Screen····························· 13909
17        Hierarchy····································· 15464
18        Loop·········································· 16068
19        Memory········································ 16548
20        Modulo········································ 16862
21        Put # On Screen······························· 16916
22        Range Error··································· 17218
23        Remove From Memory···························· 17493
24     ASCII/Video Attribute/Key Code Commands·········· 17873
25        Menu·········································· 17994
26        ASCII········································· 18205
27           Put Character······························ 18721
28           Box········································ 19038
29        Key Codes····································· 19418
30        Attribute····································· 20434
31           Border····································· 21594
32  Appendices·········································· 22152
33     Specifications··································· 22242
34     Customer Support································· 23994
35     Ordering········································· 24223
36     Same Day Email Delivery On Credit Card Orders···· 24758
37     Discount For Distributing Hex Calc··············· 24955
38     Feedback········································· 25277

End Contents



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INTRODUCTION
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WHAT YOU NEED TO KNOW

   Most of Hex Calc's operation should be readily apparent. To understand
those functions that aren't, refer to this document. Information that
isn't essential is noted, to make scanning through the manual easier.
   Copy all the files into a directory of your hard disk (or it can be run
from a floppy). Then run CnfgCalc to set up Hex Calc. Then enter
"HexCalc". Be sure your display's contrast is set so that high and low
intensity are quite distinct.
   Please do go over this document at some point. Some of Hex Calc's most
distinctive refinements may not be immediately apparent.


WHAT YOU GET FOR REGISTERING

   Hex Calc is shareware. Registration information is given at the end of
this manual. Registered owners will receive notice of updates. They will
also receive a disk with an additional version of Hex Calc. This version
is completely memory resident, allowing you to pop-up a Hex Calc window in
your application. This also makes the use of Hex Calc's interaction
features more convenient, such as getting and putting numbers and graphics
characters to your application. It also allows Hex Calc's video attribute
reference to be interactive, providing a set of commands for controlling
the color and other attributes on various sections of the screen. This is
very handy when experimenting with screen design.
   You also get instructions and a utility for preparing documents to be
used with the Auto Manual file reader. (Auto Manual was provided with this
document.) Documents thus prepared can use Auto Manuals automated contents
and index features.

NOTE: SAME DAY DELIVERY BY EMAIL IS AVAILABLE ON CREDIT CARD ORDERS. Refer
to the ordering information at the end of this manual.


FEATURES

▀  Hex/decimal/binary calculator
▀  Shows all three bases at once
▀  Selectable widths and signs
▀  Math and logic equations
▀  Reads and writes numbers to your application
▀  ASCII reference table
▀  Sends graphic characters to your application
▀  Keyboard scan code reference
▀  Video attribute reference shows sample text
▀  Modifies the colors on the screen for experimentation
   (only in the version provided to registered owners)
▀  Memory resident or stand-alone operation
▀  Selectable "hot" key
▀  Memory resident portion can be removed from memory
▀  Sophisticated memory usage avoids "trapped" memory when removed


THE CALCULATOR

   The calculator shows decimal, hexidecimal, and binary all at the same
time, and performs both math and logic functions. Its selectable widths
and signs, and its correct handling of the effects of various functions,
allow a programmer to accurately simulate the interaction of data between
different types of registers and variables.


THE REFERENCE AIDS

    The reference aids include an ASCII table which gives the hex and
decimal values. It also gives the control character name where
appropriate, and the control key.
    The keyboard scan code reference lets the user press a key, or key
combination, and gives the key code and ASCII code. Both high level
(interupt 16h) and low level (interupt 9) scan codes can be referenced.
    The video attribute aid gives a color quided chart of attributes, and
both spells out, and gives an example of, the attribute for both color and
mono systems.


INTERACTION WITH PROGRAMS

    The calculator can read numbers off the screen, and send answers back
by simulating key strokes. The version provided to registered users can
even erase the old number and write in the new number. This is convenient
for converting numbers between hex, decimal, and binary bases in just four
keystrokes.
  The ASCII reference aid can send back graphics characters, or the
complete set of box graphic characters. The version provided to registered
users has extensive capability for modifying the screen, for
experimentation during program development.
   The shareware version provided here can interact even with applications
that operate in a graphics mode, such as editors that display more than 80
x 25 characters. Because this version does not pop-up a window, but does
send characters through the keyboard interrupt, it can send back answers
of equations to such editors.

        ╒══════════════════╡ Supplementary Information ╞═════════════════╕

         For instance, if you are using editing software which operates in
         a graphics mode you can drop to DOS, run Hex Calc in the stand-
         alone mode, and give the "Put" command which sends your answer to
         InterCom, which then stores it. Return to your editor and press
         the "hot" key and InterCom will send the answer to your editor
         through the keyboard interrupt. Sending back graphics characters,
         or reading numbers off the screen (in text mode) operate
         similarly.

        ╘════════════════════════════════════════════════════════════════╛


THE THREE VERSIONS

    Hex Calc can be run in one of three modes, giving the user options
regarding memory-resident or stand-alone use, and choices among the
advantages described above. The configuration program creates a customized
batch file for the mode you choose.
   The three modes are: stand-alone, stand-alone with InterCom (a mini
memory resident program that can work with graphic mode editors), and
fully memory resident (provided to registered users).



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SETUP
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CONFIGURING HEX CALC

    The configuration program "CnfgCalc" must be run before Hex Calc is
used. Before running CnfgCalc copy all the Hex Calc files to a directory
on your hard disk. It doesn't matter what it's named, or if it is a
separate directory for Hex Calc. Run CnfgCalc and follow the instructions
on the screen.


INSTALLATION

    Having run CnfgCalc, all that's needed is to enter "HexCalc". This is
the name of the batch file created by CnfgCalc.
   Note that Hex Calc makes extensive use of high and low intensity video
for highlighting. If your monitor has two brightness controls, be sure
they are adjusted so there is a distinct difference between high and low
video. Choosing a high contrast color combination in CnfgCalc is also
helpful.
   For some functions you may find it helpfull to have your keyboard
repeat rate set to a high speed.
   Hex Calc will work with other memory resident programs. Some programs
which do not attempt to be compatible with others will need to be loaded
before Hex Calc.



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OPERATION
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BASIC COMMANDS

        ╒══════════════════╡ Supplementary Information ╞═════════════════╕

         Listed here is a brief run down of the most obvious calculator
         and general commands. Following the list are the commands which
         require a little more explanation.


0-9,A-F
         When entering numbers in decimal the old number is cleared. The
         width is expanded as needed. If too many digits are entered an
         overflow error is indicated. When entering hex or binary numbers
         the width is not expanded, and the old number is not cleared, but
         rather shifted left to accept the new digit.

Bit Manipulation
         Use the Home and PgUp keys to move the cursor under a specific
         bit. Use the PgDn key to change the status of the bit.

Enter
L/R Arrows
         Moves to the next number line.

Escape
         Either Escape or "Q" can be used to exit Hex Calc.

Komplement
         A binary complement of the current number.

NumLock,
Number Pad,
Cursor Control
         In the calculator mode: The seperate cursor keys on an extended
         keyboard can be used. Otherwise the cursor keys on the number pad
         can be used. If you prefer to have NumLock on, then the Enter and
         Tab keys can be used to move the cursor. Hex Calc can turn
         NumLock on automatically. This is selected in CnfgCalc. If you
         have an XT keyboard the state of NumLock will be indicated in the
         Hex Calc window. When you close the window, Hex Calc will restore
         NumLock to its original state. You may be asked to press NumLock
         to synchronize its light. On AT keyboards all this happens
         automatically.

         In the reference mode: Either the separate cursor keys, or the
         ones on the number pad, can be used, regardless of the state of
         NumLock.

Remainder
         Indicates a remainder after a division.

Sign
         Makes the current number signed or unsigned.

Space Bar
         Clears the current number.

Tab
Up/Down Arrows
         Moves to the next base: decimal, hex, or binary.

Two's Complement
         Binary two's complement of the current number. Changes the sign
         of signed numbers.

Width
         Changes the width of the current number to 1, 2, or 4 bytes.
         Press "W" repeatedly to change the width. Width accurately
         simulates moving data between different sized registers or
         variables. When a number is expanded, it is expanded with either
         1s or 0s depending on whether it is a negative number.   When a
         number is shrunk, the upper bits are lost. When starting from a
         width of two bytes, the width is always increased first, in order
         to avoid inadvertently losing the upper bits.

+  -  /  *
         Add, Subtract, Divide, and Multiply.

<,  >.  [  ]
         Binary shift left or right, with 0s or 1s.

        ╘════════════════════════════════════════════════════════════════╛



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CALCULATOR COMMANDS
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ADJUST ANSWER

    If Adjust is enabled, the width and sign of the answer line (third
line) will be changed as needed to fit the result.

        ╒══════════════════╡ Supplementary Information ╞═════════════════╕

         In logic equations the answer is set to the width of the widest
         operator. If Adjust is turned off, you are simply warned if there
         was an overflow or underflow by the Range Error flag. The
         "signed" indicator is not changed, and the answer is truncated to
         fit the current width of the answer line.

        ╘════════════════════════════════════════════════════════════════╛


GET # FROM SCREEN

    If InterCom is installed, put the cursor under a number in your
application, press the hot key, and InterCom will read it. When you run
Hex Calc give the "Get" command and the number will be loaded into the
calculator.
    Note that if InterCom was last used to send a graphic character to
your application the hot key will still be in that mode. The next time you
run Hex Calc the hot key is cleared and available for reading numbers.

        ╒══════════════════╡ Supplementary Information ╞═════════════════╕

         When the number is loaded into the calculator Hex Calc will
         attempt to put the number in the base that Hex Calc's cursor is
         currently under. If the number has illegal characters for that
         base, it will move up to the next base. Hex Calc can also
         optionally recognise numbers preceeded by "%" as being binary,
         and numbers preceeded by "$" as hex. This is selectable in the
         configuration program.

         Since the version provided to registered users pops-up in the
         application it can read a number and, after you've used it in the
         calculator, erase the old number and write the new one in its
         place. This allows for changing the base of a number with just
         four keystrokes. The InterCom version cannot do this because it
         cannot be sure the cursor is still under the same number it read.

        ╘════════════════════════════════════════════════════════════════╛


HIERARCHY

    This is a reference aid showing the hierarchy of mathmatical and
logical symbols in an equation in Pascal. There are similar hierarchies in
languages such as "C", however the list would be too long to be practical
in Hex Calc.

        ╒══════════════════╡ Supplementary Information ╞═════════════════╕

         Hierarchy can be used to help determine whether 3 SHL 2 * 2
         equals 24 or 48, and whether you need to bracket part of the
         equation, or rearrange the equation.

        ╘════════════════════════════════════════════════════════════════╛


LOOP

    Moves the answer to an equation to the top line. Used for repetitive
equations.

        ╒══════════════════╡ Supplementary Information ╞═════════════════╕

         Use Loop to, for instance, add a series of numbers. Enter each
         number on the second line, press "+" (or some other function),
         and the answer is copied to the top, ready to be added to again.

        ╘════════════════════════════════════════════════════════════════╛


MEMORY

    This is similar to the memory in a pocket calculator. Pressed once, it
puts the current number in memory. Pressed twice, it recalls the number in
memory. Pressed three times, it restores both the current number and
memory. This is usefull if it was pressed by accident in the first place.


MODULO

    Gives the remainder of a division.


PUT # ON SCREEN

    Puts the number Hex Calc's cursor is currently under into InterCom.
When you return to your application, press the hot key and InterCom will
send the number to your application through the keyboard interrupt.
    Also see GET # FROM SCREEN for additional information.


RANGE ERROR

    Indicates that too many characters were entered in decimal, or an
overflow or underflow in a calculation. See Adjust answer.
    This does not occur in hex or binary number entry, because new digits
are allowed to be shifted into the old number.


REMOVE FROM MEMORY

    Removes InterCom from memory. Because of Hex Calc's method of memory
usage, it can be removed from within an application, and that memory will
immediately be available. Hex Calc can be repeatedly installed and
removed. For further information see "Specifications".



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ASCII/VIDEO ATTRIBUTE/KEY CODE COMMANDS
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MENU

    This lists the commands and modes available in ASCII. You do not have
to return to the menu to use these commands.


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ASCII

    Use the arrows to move around the table. The hex and decimal ASCII
numbers are given in the upper right corner. If the number is a control
character, its name and Control key combination are given.

        ╒══════════════════╡ Supplementary Information ╞═════════════════╕

         You may find it helpfull to have your keyboard repeat rate set to
         a high speed for moving around the chart quickly.

        ╘════════════════════════════════════════════════════════════════╛


   PUT CHARACTER - sends the currently selected character to InterCom.
When you return to your application, press the hot key and the
character will be sent to your application through the keyboard
interrupt. You can continue to use the hot key to send this
character until the next time you run Hex Calc.

   BOX - sends the entire set of characters for drawing boxes to InterCom.
When you return to your editor, press the hot key and the characters
will be sent to your editor through the keyboard interrupt. You can
then use your editor's copy and move commands to use the characters
as needed.


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KEY CODES

    Press any key or key combination and the key code and ASCII value will
be given, as well as whether this is an "extended" key code (one that has
an ASCII value of 0). The only command active when in Key Codes is "M" to
return to the menu.

        ╒══════════════════╡ Supplementary Information ╞═════════════════╕

         These are the interpreted key codes, modified according to shift,
         alt, control, numlock, and capslock keys (interrupt 16h key codes
         as opposed to interrupt 9  key codes). Note however, that the low
         level scan code (interrupt 9) is the same as the key code that is
         given when no shift, etc. keys are pressed. This is true for all
         keys except F11 and F12 which have high level codes of 133 and
         134, but low level scan codes of 217 and 218.

        ╘════════════════════════════════════════════════════════════════╛


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ATTRIBUTE

    Use the arrow keys to move through the possible attributes. On a color
screen the color bars around the lower left corner serve as a color guide,
the vertical bar indicating background colors, and the horizontal bar
indicating text colors.

        ╒══════════════════╡ Supplementary Information ╞═════════════════╕

         The cursor in the ASCII table is just there as a graphic
         representation of where you are in the possible codes, and also
         works in conjunction with the color bars. On a color system, the
         name of the color combination will be shown in that combination.

         The version provided to registered users, because it pops-up in
         the application, has a set of commands for changing the color,
         intensity, and blinking attributes of selected areas of the
         screen. This is very useful when experimenting with screen design.

         You may find it helpfull to have your keyboard repeat rate set to
         a high speed for moving around the chart quickly.

        ╘════════════════════════════════════════════════════════════════╛


   BORDER - This command only appears on color systems. It changes the
border area (the area beyond where screen writing occurs) to the
currently selected text color.

        ╒══════════════════╡ Supplementary Information ╞═════════════════╕

         Most applications that operate in text mode do not clear this
         color. This is usefull when experimenting with screen design.

        ╘════════════════════════════════════════════════════════════════╛



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APPENDICES
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SPECIFICATIONS

THE FILES
     CnfgCalc.Exe   -   The configuration routine
     SaCalc.Exe     -   The stand-alone program
     InterCom.Exe   -   (Inter-application Communication) The memory
                        resident program that interacts with other
                        applications.
     InstCalc.Exe   -   Installs InterCom
     HexCalc.Cfg    -   Used by CnfgCalc to remember the current settings
                        (This file doesn't exist until CnfgCalc is run)
     HexCalc.Bat    -   The batch file made by CnfgCalc to run Hex Calc
                        (This file doesn't exist until CnfgCalc is run)
     HexCalc.Doc    -   This manual
     AutoManl.Exe   -   The file reader with automated contents & index
     Read.Me        -   Introduction file

MEMORY REQUIREMENTS
    InterCom occupies less than 10K

INTERRUPTS USED
    InterCom uses interrupt 16h. It passes on the interrupt to the next
routine so that it can work with other memory resident programs. Some
programs which pre-empt the interrupt should be loaded before InterCom.
The interrupt is restored when InterCom is removed.
    InterCom also uses one of the user interrupts, whichever one it can
find available. When it is removed it clears the interrupt.

MEMORY USAGE
    InterCom's method of using memory allows it to be removed at anytime
without resulting in "trapped" memory. It can be removed from within a
"drop to DOS" shell, and the memory will be immediately available. It can
even be installed from within many DOS shells.  InterCom can be repeatedly
installed and removed.

DOS & PC REVISIONS
    Hex Calc requires DOS revision 2.0 or higher. It is compatible with
DOS 4, and with the PS/2.


CUSTOMER SUPPORT

    Customer support is available to registered owners of Hex Calc.
       Tom Cantlon
       Box 1635
       Chino Valley, AZ 86323
       [phone]
       CIS 71370,2520
       Genie On-Line


ORDERING

    Hex Calc is shareware and costs $25. If it will be used on multiple
systems, enquire about a site license. Registered users receive an
additional version of Hex Calc and other benefits. See "What You Get For
Registering" at the beginning of this manual.
    Make checks payable to Tom Cantlon at the address given above.
    Visa and MasterCard orders can also be accepted. Provide a written
request with your name, the card number and experation date, the amount,
the date, and your signature on it.


SAME DAY EMAIL DELIVERY ON CREDIT CARD ORDERS

    For fastest service, call or email your credit card order and you will
receive the registered version of Hex Calc the same day by Email.


DISCOUNT FOR DISTRIBUTING HEX CALC

    If you upload the shareware version of Hex Calc to a BBS that it is
not already on, take $5 off the price for each such upload. Be sure all
the files stay together (see the list in "Specifications"). Document the
BBSs and their locations when you register. And thanks.


FEEDBACK

    If you have any problems or suggestions for Hex Calc, please pass them
on. Use the addrsess given above. Hex Calc can only keep up with the needs
of its users if they express themselves.


INDEX

  1  Addition··························Basic Commands···············  9972
  2  Adjust Answer·····················Adjust Answer················ 13254
  3               ·····················Range Error·················· 17218
     Arrow Keys························(see Cursor Keys)
  4  AT Keyboard·······················Basic Commands···············  9972
     Attribute·························(see Video Attribute)
     Automatic NumLock·················(see NumLock)
  5  Base······························Get # From Screen············ 13909
  6  Batch File························What You Need To Know········  3065
  7            ························The Three Versions···········  8091
  8            ························Installation·················  9079
  9            ························The Files···················· 22260
 10  Binary Entry······················Range Error·················· 17218
 11              ······················Basic Commands···············  9972
 12  Bit Manipulation··················Basic Commands···············  9972
 13  Box·······························Box·························· 19038
     Brightness························(see Intensity)
 14  Caps Lock·························Key Codes···················· 19418
 15  Character·························Put Character················ 18721
 16           ·························Box·························· 19038
 17  Color Monitor·····················Attribute···················· 20434
 18  Color Selection···················Installation·················  9079
 19  Compatibility·····················Installation·················  9079
 20               ·····················Interrupts Used·············· 23100
 21               ·····················DOS & PC Revisions··········· 23868
     Complement························(see Komplement Command)
 22  Configuration·····················Setup························  8653
 23               ·····················Configuring Hex Calc·········  8740
 24               ·····················The Files···················· 22260
     Contrast··························(see Intensity)
 25  Control Keys/Characters···········ASCII························ 18205
 26  CnfgCalc··························What You Need To Know········  3065
 27          ··························Configuring Hex Calc·········  8740
 28          ··························Installation·················  9079
 29          ··························The Files···················· 22260
 30  Cursor Keys·······················Basic Commands···············  9972
 31             ·······················Attribute···················· 20434
 32             ·······················ASCII························ 18205
 33  Customer Support··················Customer Support············· 23994
 34  Decimal Entry·····················Range Error·················· 17218
 35               ·····················Basic Commands···············  9972
 36  Directories·······················What You Need To Know········  3065
 37             ·······················Configuring Hex Calc·········  8740
 38  Division··························Basic Commands···············  9972
 39          ··························Modulo······················· 16862
 40  DOS Revisions·····················DOS & PC Revisions··········· 23868
 41  DOS Shell·························Memory Usage················· 23527
 42  Enter Key·························Basic Commands···············  9972
 43  Entering Numbers··················Range Error·················· 17218
 44                  ··················Basic Commands···············  9972
 45  Escape Key························Basic Commands···············  9972
 46  Extended Keys·····················Key Codes···················· 19418
 47  F11/F12···························Key Codes···················· 19418
 48  Files·····························The Files···················· 22260
 49  Registered Version················What You Get For Registering·  3696
 50                    ················Interaction With Programs····  6451
 51  Get #·····························Get # From Screen············ 13909
 52       ·····························Put # On Screen·············· 16916
 53  Graphic Character·················Put Character················ 18721
 54                   ·················Box·························· 19038
 55  Hex Entry·························Range Error·················· 17218
 56           ·························Basic Commands···············  9972
     HexCalc···························(see Batch File or Configuration)
 57  Hierarchy·························Hierarchy···················· 15464
 58  Installation······················Installation·················  9079
 59  InstCalc··························The Files···················· 22260
 60  Intensity·························What You Need To Know········  3065
 61           ·························Installation·················  9079
 62  Interaction W/Programs············Interaction With Programs····  6451
 63  InterCom··························Interaction With Programs····  6451
 64          ··························Memory Requirements·········· 23040
 65  Interrupts························Key Codes···················· 19418
 66            ························Interrupts Used·············· 23100
 67  Key Codes·························Key Codes···················· 19418
 68  Komplemetnt Command···············Basic Commands···············  9972
 69  Logic Functions···················Basic Commands···············  9972
 70                 ···················Adjust Answer················ 13254
 71  Loop······························Loop························· 16068
 72  Math Functions····················Basic Commands···············  9972
 73  Memory Command····················Memory······················· 16548
 74  Memory Requirements···············Memory Requirements·········· 23040
 75  Memory Resident···················The Three Versions···········  8091
 76                 ···················Memory Requirements·········· 23040
 77                 ···················Memory Usage················· 23527
                    ···················(also see Compatibility)
 78  Menu, ASCII·······················Menu························· 17994
     Modes·····························(see Versions)
 79  Modulo····························Modulo······················· 16862
 80  Mono Monitor······················Attribute···················· 20434
 81  Multiplication····················Basic Commands···············  9972
 82  Number Entry······················Range Error·················· 17218
 83              ······················Basic Commands···············  9972
 84  Number Pad························Basic Commands···············  9972
 85  NumLock···························Basic Commands···············  9972
 86         ···························Key Codes···················· 19418
 87  Ordering··························Ordering····················· 24223
 88  Overflow··························Adjust Answer················ 13254
 89          ··························Range Error·················· 17218
 90          ··························Basic Commands···············  9972
 91  Overwrite Old #···················Get # From Screen············ 13909
 92  PC Revisions······················DOS & PC Revisions··········· 23868
 93  PS/2······························DOS & PC Revisions··········· 23868
 94  Put #·····························Put # On Screen·············· 16916
 95  Put Character·····················Put Character················ 18721
 96  Range Error·······················Adjust Answer················ 13254
 97             ·······················Range Error·················· 17218
 98  Registers·························The Calculator···············  5502
 99  Remainder·························Basic Commands···············  9972
100           ·························Modulo······················· 16862
101  Remove From Memory················Remove From Memory··········· 17493
102                    ················Interrupts Used·············· 23100
103                    ················Memory Usage················· 23527
                       ················(also see Memory Resident)
104  Repetitive Equations··············Loop························· 16068
105  Replace Old #·····················Get # From Screen············ 13909
     Resident··························(see Memory Resident)
106  Scan Codes························Key Codes···················· 19418
107  Setup·····························Setup························  8653
108  Shell, DOS························Memory Usage················· 23527
109  Shift Keys························Key Codes···················· 19418
110  Shift, Logical····················Basic Commands···············  9972
111  Signed····························Basic Commands···············  9972
112        ····························Adjust Answer················ 13254
     SL/R, SL1/R1······················(see Shift Logical)
113  Space Key·························Basic Commands···············  9972
114  Specifications····················Specifications··············· 22242
115  Stand-Alone·······················Interaction With Programs····  6451
116  Subtraction·······················Basic Commands···············  9972
117  Support···························Customer Support············· 23994
118  Tab Key···························Basic Commands···············  9972
     Trapped Memory····················(see Memory Resident)
119  Two's Complement··················Basic Commands···············  9972
120  Underflow·························Adjust Answer················ 13254
121           ·························Range Error·················· 17218
122           ·························Basic Commands···············  9972
123  User Interrupts···················Interrupts Used·············· 23100
124  Variables·························The Calculator···············  5502
125  Versions··························The Three Versions···········  8091
126  Video Attribute···················Attribute···················· 20434
127  Width·····························Basic Commands···············  9972
128       ·····························Adjust Answer················ 13254
129  XT Keyboard·······················Basic Commands···············  9972

End Index