add directory Minix
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Minix/2.0.0/wwwman/man1/ic.1.html
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Minix/2.0.0/wwwman/man1/ic.1.html
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<HTML>
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<HEAD>
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<TITLE>ic(1)</TITLE>
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</HEAD>
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<BODY>
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<H1>ic(1)</H1>
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<HR>
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<PRE>
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</PRE>
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<H2>NAME</H2><PRE>
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ic - integer calculator
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</PRE>
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<H2>SYNOPSIS</H2><PRE>
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<STRONG>ic</STRONG> [<EM>expression</EM>]
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</PRE>
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<H2>EXAMPLES</H2><PRE>
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<STRONG>ic</STRONG> # Start the calculator
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<STRONG>ic</STRONG> <STRONG>250</STRONG> <STRONG>300+</STRONG> # Start calculator with 550 on the stack
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</PRE>
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<H2>DESCRIPTION</H2><PRE>
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<EM>Ic</EM> is a simple RPN (Reverse Polish Notation) calculator, used for small
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calculations and base conversions. All calculations are done using 32 bit
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integers. The standard input is usually a keyboard and the standard
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output requires a device with a 'termcap' entry. The program starts by
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interpreting any <args> as commands, where the separation between
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arguments is considered to be the same as the ENTER key. For example,
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<STRONG>ic</STRONG> <STRONG>692</STRONG> <STRONG>784+</STRONG>
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After reading the arguments input is from the keyboard.
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<STRONG>Stack</STRONG> <STRONG>Operations</STRONG>
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The operation of this program is similar to an RPN calculator. A six
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level stack is used. The ENTER key pushes the stack up one level. For
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example, '12+5' is entered as '12 ENTER 5 +".
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The top two entries on the stack are exchanged by the <EM>x</EM> command, and the
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stack is rolled down one (popped) by the <EM>p</EM> key. The top of the stack may
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be cleared by pressing the back-space key. The whole stack and the
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registers are initialized by a <EM>z</EM>.
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<STRONG>Numeric</STRONG> <STRONG>Entry</STRONG>
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The input and output bases are initially decimal, but they may be changed
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using the <EM>i</EM> and <EM>o</EM> commands. The <EM>i</EM> command changes both bases, but the <EM>o</EM>
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command changes just the output base. These commands take a one
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character argument of <EM>h</EM>, <EM>d</EM>, <EM>o</EM> or <EM>b</EM> to change to Hexadecimal, Decimal,
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Octal or Binary. While the input base is hexadecimal the letters <EM>a</EM>
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through <EM>f</EM> are used to represent the decimal values 10 through 15.
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When the input base is decimal: multiply, divide and remainder are
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signed, otherwise they are performed unsigned.
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The output base may also be changed to ASCII (<EM>a</EM>), this causes the least
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significant 7 bits of a value to be displayed as a character. To input an
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ASCII value the translate (<EM>t</EM>) command may be used, it accepts one
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character as its argument.
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<STRONG>Calculations</STRONG>
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The arithmetic operations supported are: Negate ('.'), Add ('+'),
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Subtract ('-'), Multiply ('*'), Divide ('/'), and Remainder ('%'). The
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logical (Boolean) operations available are: NOT ('~'), AND ('&'), OR
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('|'), and EXCLUSIVE-OR ('^').
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After one of these operations the last top of stack value is saved. It
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may be restored by pressing <EM>l</EM> (L).
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<STRONG>Saving</STRONG> <STRONG>Results</STRONG>
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Ten temporary registers are available. The Store (<EM>s</EM>) command followed by
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a digit ('0'..'9') will copy the top of the stack to the specified
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register. The Recall (<EM>r</EM>) command pushes the contents of a register onto
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the top of the stack.
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If the Store command is followed by a '+' preceding the digit, then the
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top of the stack will be added to the specified 'accumulator' register.
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Values may also be written to a file. The <EM>w</EM> command writes the top of the
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stack, using the current output base, to a file called 'pad' in the
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current directory. If the user does not have write access to the current
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directory then the file /<EM>tmp</EM>/<EM>pad</EM>_$<EM>USER</EM> is used as the scratch pad. The
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scratch pad file is erased on the first use of the <EM>w</EM> command within each
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new invocation of 'ic'.
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<STRONG>Miscellaneous</STRONG>
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The Quit (<EM>q</EM>) key causes an immediate exit. The <EM>m</EM> command temporarily
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leaves <EM>ic</EM> by invoking the shell as a sub-process. For help while using
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<EM>ic</EM>, hit the <EM>h</EM> key. If an erroneous key is pressed the bell will sound.
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<STRONG>Command</STRONG> <STRONG>Summary</STRONG>
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Note that many commands have an alternative key-code available on the
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extended AT keyboard. This aids entry by including most commands on the
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right side of the keyboard.
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ENTER Enter (push up)
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BS (DEL) Clear top of stack
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h Help
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i Input base (h, d, o, b)
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l (PGDN) Last top of stack
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m MINIX shell
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o Output base (h, d, o, b, a)
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p (DOWN) Pop stack (roll down)
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q (END) Quit
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r (LEFT) Recall (0-9)
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s (RIGHT) Store [+] (0-9)
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t Translate (char)
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w (PGUP) Write top of stack to scratch pad
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x (UP) Exchange top of stack
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z (HOME) Zero all state
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. Change sign
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+ (+) Add
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- (-) Subtract
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* Multiply
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/ Divide
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% (sh/5) Remainder
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(tilde) Not
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& And
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| Or
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^ Exclusive-or
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<STRONG>Author</STRONG>
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<EM>Ic</EM> was written by Terrence W. Holm.
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</PRE>
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</BODY>
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</HTML>
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