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diff --git a/static/unix-v10/man1/bas.1 b/static/unix-v10/man1/bas.1 new file mode 100644 index 00000000..2bdaa5b1 --- /dev/null +++ b/static/unix-v10/man1/bas.1 @@ -0,0 +1,312 @@ +.pa 1 +.he 'BAS (I)'1/15/73'BAS (I)' +.ti 0 +NAME bas -- basic +.sp +.ti 0 +SYNOPSIS bas___ [ file ] +.sp +.ti 0 +DESCRIPTION bas___ +is a dialect of basic [1]. +If a file argument is provided, +the file is used for input before the console +is read. +.sp +bas___ accepts lines of the form: +.sp + statement + integer statement +.sp +Integer numbered statements +(known as internal statements) +are stored for later execution. +They are stored in sorted ascending order. +Non-numbered statements are immediately executed. +The result of an immediate expression statement +(that does not have '=' as its highest operator) is printed. +.sp +Statements have the following syntax: +.sp +.in +6 +.ti -3 +expression +.br +The expression is executed for its side +effects (assignment or function call) +or for printing as described above. +.sp +.ti -3 +done____ +.br +Return to system level. +.sp +.ti -3 +draw____ expression expression expression +.br +A line is drawn on the Tektronix 611 display (/dev/vt0) from +the current display position +to the XY co-ordinates specified by the +first two expressions. +(The scale is zero to one in both X and Y directions) +If the third expression +is zero, the line is invisible. +The current display position is set to the end point. +.sp +.ti -3 +display_______ list +.br +The list of expressions and strings is +concatenated and displayed (i.e. printed) on the 611 starting +at the current display position. +The current display position is not changed. +.sp +.ti -3 +erase_____ +.br +The 611 screen is erased. +.sp +.ti -3 +for___ name =_= expression expression statement +.ti -3 +for___ name =_ expression expression +.br +.li +... +.ti -3 +next____ +.br +The for___ statement +repetitively executes a +statement (first form) +or a group of statements (second form) +under control of a named variable. +The variable takes on the value of +the first expression, +then is incremented by one on each loop, +not to exceed the value of +the second expression. +.sp +.ti -3 +goto____ expression +.br +The expression is evaluated, truncated to an integer +and execution goes to the corresponding integer numbered statment. +If executed from immediate mode, +the internal statements are compiled first. +.sp +.ti -3 +if__ expression statement +.br +The statement is executed if the expression evaluates +to non-zero. +.sp +.ti -3 +list____ [expression [expression]] +.br +list____ is used to print out the stored internal statements. +If no arguments are given, all internal statements are printed. +If one argument is given, only that +internal statement is listed. +If two arguments are given, all internal statements +inclusively between the arguments are printed. +.sp +.ti -3 +print_____ list +.br +The list of expressions and strings are concatenated and +printed. +(A string is delimited by " characters.) +.sp +.ti -3 +return______ [expression] +.br +The expression is evaluated and the result is passed +back as the value of a function call. +If no expression is given, zero is returned. +.sp +.ti -3 +run___ +.br +The internal statements are compiled. +The symbol table is re-initialized. +The random number generator is re-set. +Control is passed to the lowest numbered internal +statement. +.sp +.ti -6 +Expressions have the following syntax: +.sp +.ti -3 +name +.br +A name is used to specify a variable. +Names are composed of a letter ('a' - 'z') +followed by letters and digits. +The first four characters of a name are significant. +.sp +.ti -3 +number +.br +A number is used to represent a constant value. +A number is composed of digits, at most one decimal point ('.') +and possibly a scale factor of the form +e_ digits or e-__ digits. +.sp +.ti -3 +(_ expression )_ +.br +Parentheses are used to alter normal order of evaluation. +.sp +.ti -3 +expression operator expression +.br +Common functions of two arguments are abbreviated +by the two arguments separated by an operator denoting the function. +A complete list of operators is given below. +.sp +.ti -3 +expression (_ [expression [,_ expression ...]] )_ +.br +Functions of an arbitrary number of arguments +can be called by an expression followed by the arguments +in parentheses separated by commas. +The expression evaluates to the +line number of the entry of the function in the +internally stored statements. +This causes the internal statements to be compiled. +If the expression evaluates negative, +a builtin function is called. +The list of builtin functions appears below. +.sp +.ti -3 +name [_ expression [,_ expression ...] ]_ +.br +Each expression is truncated to an integer +and used as a specifier for the name. +The result is syntactically identical to a name. +a[1,2] is the same as a[1][2]. +The truncated expressions are restricted to +values between 0 and 32767. +.sp +.ti -6 +The following is the list of operators: +.sp +.ti -3 += +.br += is the assignment operator. +The left operand must be a name or an array element. +The result is the right operand. +Assignment binds right to left, +all other operators bind left to right. +.sp +.ti -3 +& | +.br +&_ (logical and) +has result zero if either of its arguments are zero. +It has result one if both its arguments are non-zero. +|_ (logical or) +has result zero if both of its arguments are zero. +It has result one if either of its arguments are non-zero. +.sp +.ti -3 +< <= > >= == <> +.br +The relational operators +(< less than, <= less than or equal, +> greater than, +>= greater than or equal, +== equal to, +<> not equal to) +return one if their arguments are in the specified +relation. +They return zero otherwise. +Relational operators at the same level extend as follows: +a>b>c is the same as a>b&b>c. +.sp +.ti -3 ++ - +.br +Add and subtract. +.sp +.ti -3 +* / +.br +Multiply and divide. +.sp +.ti -3 +^ +.br +Exponentiation. +.sp +.ti -6 +The following is a list of builtin functions: +.sp +.ti -3 +arg +.br +Arg(i) is the value of the i_th +actual parameter on the current level +of function call. +.sp +.ti -3 +exp +.br +Exp(x) is the exponential function of x. +.sp +.ti -3 +log +.br +Log(x) is the logarithm base e of x. +.sp +.ti -3 +sin +.br +Sin(x) is the sine of x (radians). +.sp +.ti -3 +cos +.br +Cos(x) is the cosine of x (radians). +.sp +.ti -3 +atn +.br +Atn(x) is the arctangent of x. +.sp +.ti -3 +rnd +.br +Rnd() is a uniformly distributed random +number between zero and one. +.sp +.ti -3 +expr +.br +Expr() is the only form of program input. +A line is read from the input and +evaluated as an expression. +The resultant value is returned. +.sp +.ti -3 +int +.br +Int(x) returns x truncated to an integer. +.in -6 +.sp +.ti 0 +FILES /tmp/btm? temporary +.sp +.ti 0 +SEE ALSO [1] DEC-11-AJPB-D +.sp +.ti 0 +DIAGNOSTICS Syntax +errors cause the incorrect line to be typed +with an underscore where the parse failed. +All other diagnostics are self explanatory. +.sp +.ti 0 +BUGS -- |