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-.TH BITE 1 local
-.SH NAME
-bite \- Basic Interpreter for Testing & Engineering
-.SH SYNOPSIS
-.B bite
-[ - ] [prog1 prog2 prog3 .....]
-.SH DESCRIPTION
-.I Bite
-is a BASIC language interpreter.
-Its virtues are in that it is written in the Bell System 'C'
-compiler language which lends itself to
-.I portability
-and
-.I readability.
-One of the most important aspects is that the interpreter is
-.I interfaced
-with the
-.I system shell via the '!' command.
-Shell commands can be executed inmmediately or actually typed into
-the BASIC program itself!
-"bite" may also be invoked by a shell script and when given an argument
-(a program name) will automatically cause the  BASIC program to be
-executed. In that case the BASIC program should be terminated with
-a "bye" statement.
-The inclusion of the '-' option, along with a BASIC program name will
-cause "bite" to start and then "load" the BASIC program
-.I without
-running it.
-.PP
-.I Bite
-is designed so that BASIC language programs
-of the original Dartmouth syntax will be loadable
-with little or no incompatibility and extra features that do not
-follow common standards will be
-.I additions
-to, rather than
-.I exceptions
-to the syntax rules of BASIC.
-
-The commands and functions in this interpreter
-are implemented by entries into
-tables and the procedure for implementing new
-commands will be documented as another virtue of the
-configuration of this interpreter.
-.PP
-.I Bite
-was implemented
-with
-.I instrument control
-and
-.I data collection
-in mind
-for the purpose of controlling an
-.I Automated Test System (ATS).
-These functions will be available as an extended instruction set.
-Another version of "bite" is being configured for this purpose
-which will reside (initially) on an PDP-11/03 (subsequently on
-a PDP-11/23).
-.PP
-A standard string capability is implemented on the BASIC interpreter
-BITE.
-.TP 4
-.I Conventions
-.TP 8
-.I THIS DOCUMENT
-All things enclosed in [] are optional.
-.TP 8
-.I EDITING
-Editing is accomplished as it is in any BASIC language intepreter
-in that line-numbers are entered by typing a line-number followed
-by the statement and removed or deleted by merely typing the line-number.
-Listing is accomplished with the "list" command (explained under "COMMANDS").
-In addition to the above, it is possible to list single lines by typing
-the return-key in which case the program is listed one line-at-a-time,
-starting at the first. When the last one is reached, the sequence starts
-at the first line again.
-At any time it is also possible to type the '-' symbol to "backup" a line-
-at-a-time.
-Other editing facilities are "s", "delete", and "reseq" also explained
-under "COMMANDS".
-.TP 8
-.I EXPR
-Any algebraic expression which could be a constant, variable, math
-function or a combination of same, seperated by arithmetic operators
-as in: a+b*3.14*(4.4+c2*sin(b+s))+a(2,2)
-See "variables" and "math functions" below.
-.TP 8
-.I OPERATORS
-+,-,*,/ or ^ for addition, subtraction, multiplication, division or
-exponentiation in order of lowest to highest precidence. + and - have
-the same precidence and * and / have the same precidence.
-.TP
-.I RELATIONALS
-<, >, =, <=, >=, <> for less than, greater than, equality, less or equal,
-greater than or equal and not equal.
-.TP 8
-.I SOURCE PATH
-When reference is made to a "bite" source file (i.e. the "old" and "load"
-command), at least two directories are searched, the first being the current
-directory and then /usr/lib/bites which is a "pool" where shared programs
-should be stored. The /usr/lib/bites directory is analogous to the
-/usr/bin directory in UNIX.
-The user may specify extra paths to be searched by defining them in
-BITEPATH and then exporting BITEPATH like:
-.br
-BITEPATH=:$HOME/BASIC:/usr/local/lib/:
-.br
-which adds the two pathnames between the ':' delimiters to the
-other paths. In this way, one may have private BITE programs
-and execute them  from any directory.
-.TP 8
-.I SOURCE PROGRAM NAME
-The source program name is twelve or less characters suffixed by a .b .
-.TP 8
-.I STATEMENT
-A basic statement consists of a line number (integer value between 1 and
-32767) followed by a command, space and operand which follows the
-syntax governed by the command as in: 100 print "hello world"
-A statement can be typed without a line number in which case it will
-execute immediately. This is true for all commands, but doesn't make
-sense for all commands such as "for". Immediate execution is handy
-for diagnostic purposes such as: print a, to find out what the value
-of a.
-.TP 8
-.I VARIABLES
-All variable names are either a lower case alpha character (a-z)
-or a lower-case alpha character followed by an integer (0-9).
-Array have the same name convention as regular variables and take
-the form varname(D1,D2,D3....D10) where D1-D10 are the dimension
-attributes of the array and can take the form of any legal expression
-(including another array) as in a(b(2,2),x).
-.TP 8
-.I STRING VARIABLE
-A string variable is any single lower case alpha character (a-z)
-followed by a '$' or any single alpha character followed by a single digit
-(1-9) then followed by a '$' like a$ or z9$.
-.TP 8
-.I STRING ARRAY VARIABLE
-A string array variable has the same naming convention as a regular string
-variable and contains one or two "subscripts" enclosed in parenthesis
-as in:
-.br
-	x1$(x,y)
-
-Like other array variables in BASIC string arrays must be declared
-in a dimension statement prior to their use: e.g. dim a$(20) or
-d$(100,3).
-.TP 8
-.I STRING EXPRESSION
-A string expression is any combination of string variables and
-literals added together by a '+' operator which indicates concatenation.
-An example of an assignment statement for string variables is:
-
-	b$="Joan"+a1$+c2$+"John"+x$(20)
-.SH COMMANDS
-.TP 8
-.I bye or q
-Exit
-the interpreter.
-.TP 8
-.I com[mon]
-Preserve
-variables for subsequent "run". Issue of the run command
-otherwise de-allocates all variables.
-.TP 8
-.I con \fR[line#]
-Continue normal execution from single step mode. See "sing" command.
-.TP 8
-.I data \fR(expr),(expr),(expr),..........
-The data statement is a string of defined constants or expressions referred
-to by the "read" statement. Unlike most BASIC interpreters, the data is
-stored only in the form of text strings which allows the read statement to
-evaluate expressions as well as constants.
-.TP 8
-.I del[ete] \fRlownum [, highnum]
-Delete line-number specified if only lownum given. Delete all lines
-between lownum and highnum if both are specified.
-See the "undo" command.
-.TP 8
-.I dim \fRvariable(expr1,expr2,....,expr10)
-Allocate space and define the dimensional characteristics of
-subscripted variable.
-.TP 8
-.I end
-Define logical end of program. Cause termination or current "run".
-.TP 8
-.I expunge
-Force all variable space, including subscripted variables to be freed.
-Or de-allocate used varriable space.
-.TP 8
-.I f
-Identify current file. Typing "f" causes the currently referenced
-file (if any) to be displayed.
-.TP 8
-.I for - next
-Cause code enclosed by this combination to be executed under the
-conditions specified in the
-.I for
-statement as in: for variable = expr1 to expr2 [step expr].
-.TP 8
-.I gosub \fRline#
-Goto subroutine, resume from following statement after "return" encountered.
-.TP 8
-.I goto \fRline#
-Force execution to continue starting at the line# specified.
-.TP 8
-.I if \fR(expr1) relational (expr2) \fIthen \fRline#
-Redirect program flow to line# if expr1 is related to expr2 by the
-specified relational.
-String expressions are also compared by the "if" statement as in:
-.br
-if a$ < "jim" goto 100
-.br
-The results of the comparison are based on alphabetical order
-of the two objects being compared.
-The "then" in the "if" statement can be optionally replaced with "goto"
-"go to" or "gosub". The "if" statement can also take the form:
-.br
-.I if \fR(expr) relatioanl (expr) \fIthen \fRvar = (expr)
-.TP 8
-.I if \fRmore _fd \fI then \fRline#
-Direct program flow to line# if there are more lines to be read
-from the file associated with fd where fd is the file designator
-between 1 and 4 inclusive. This type if statement is used to detect
-EOF (End Of File) condition.
-.br
-Example: 100 if more _2 then 200
-.br
-Note that "gosub" can be used in place of "then" in which case
-the subroutine would be one for reading another line.
-.TP 8
-.I input \fR[_fildes]var1[,var2,var3,....]
-Prompt for input and assign inputed value to variable.
-If 's' is typed program is halted.
-String variables may be specified in the "input" statement. The
-variables can be mixed like:
-.br
-input a$,a,b$(2,2)
-.br
-which will interpret the first input as a string, require the second
-input to be numerical and interpret the third as a string input.
-.TP 8
-.I [let] \fRvariable = expr
-Assign the value of expr to variable.
-The let is optional.
-The let or assignment statement also allows the assignment of
-string expressions to string variables like:
-.br
-b$="Joan"+a1$+c2$+"John"+x$(20)
-.TP 8
-.I l[ist] \fR[lownum [, highnum]]
-List the text in working storage. If lownum is given then only that number
-is listed, if lownum and highnum are specified, then a listing is
-displayed between the given statement numbers.
-.TP 8
-.I load \fR[prog-name]
-Same as the "old" command, except working storage is not cleared.
-.TP 8
-.I ls \foptions
-List directory. Same as UNIX "ls" command.
-.TP 8
-.I mov \fRstartnum,endnum,newnum [,increm]
-The mov command causes the lines beginning with
-.I startnum
-and ending with
-.I endnum
-to be moved (ie. resequenced) to the line beginning with
-.I newnum
-and incremented by
-.I increm \fR.
-The default value for
-.I increm
-is 10.
-All references to the moved lines are updated. The user is responsible to
-see that line numbers associated with moved lines do not conflict with
-existing lines which will cause loss of program text.
-.I mov
-is similar to
-.I reseq
-(see below) except that only the specified lines are resequenced.
-.TP 8
-.I n
-List the next 23 lines. Useful for paging through a listing on a CRT.
-.TP 8
-.I new
-Clear program working storage for new program to be typed.
-.TP 8
-.I old \fR[prog-name]
-Clear user space and load program. If old is typed with no argument
-it will prompt the user for a program name if not defined or load
-the last defined program name.
-.TP 8
-.I on \fR(expr) \fIgoto \fRline#,line#,.......
-Is a selective goto with multiple line number targets. The target
-branched to depends on the value of expr which is truncated.
-Control is passed to the first line# specified after goto if the
-value of the expression is 1. Control passes to the second line#
-if the value is 2, the third if 3 and so on.
-.TP 8
-.I on \fR(expr) \fIgosub \fRline#,line#,.......
-Same action as on-goto, except action taken is that of "gosub".
-.TP 8
-.I pause
-Causes execution to be suspended until a "newline" or "return" is typed.
-This is useful for programs which need to be continuously in "run", but
-need to allow a time for user action i.e. unit insertion.
-.TP 8
-.I pr[int] \fR[_fildes](expr's,quoted strings or tab operators)
-The print statment is a limited format display statement in which
-expressions are evaluated and displayed along with quoted literals.
-The tab(expr) operator causes the print head to move to the absolute
-column position computed by expr provided the current head position
-is less. The specifiers must be seperated by onee or more commas
-or semicolons.
-String expressions are also expanded by the print statement.
-.TP 8
-.I printf \fR[_fildes]"format string"[,expr1,expr2,.....,expr10]
-This is an interpretive implementation of the UNIX 'C' library
-routine, printf. It is, however restricted to only the floating
-point format control specifiers 'f' and 'g'. Use of any of the
-other specifiers such as 'o', 'd' or 's' will give erroneous results.
-Print controls such as \\b (backspace), \\n (newline), \\r (return)
-or \\t can also be used. The printf format was chosen in lieu
-of the usual "print using" command because it was felt that
-printf is not only a 'C' language standard but easier to use
-than "print using".
-.br
-Usage Example:
-.br
-100 printf "Variable a=%2.2f\\tVariable b=%g.\\n",a,b
-.TP 8
-.I randomize
-Causes "rnd" statement to start at an "unpredictable" value.
-.TP 8
-.I read \fRvar1,var2,var3,..............
-The "read" statement causes data to be assigned to each variable in the
-list from the constants or expressions contained in "data" statements. The
-reading starts where-ever the data pointer is currently at. The data pointer
-points to the last data field accessed, if a read was done, the first
-data field in the first data statment if the "restore" statment is issued
-or the program is re-run.
-The "read" statement will also assign values to string variables or
-expressions in the "data" statement.
-.TP 8
-.I rem
-The remark statement causes no operation in 
-.I bite
-but may be followed by any string of characters for the purpose of commenting
-a program. Unlike compiler languages, remarks do take up program buffer space,
-however, they are of paramount importance in making a program readable by
-human beings and are therefore strongly recommended.
-.TP 8
-.I reseq \fR[startnum [, increm]]
-The resequence command causes the statement numbers and all references
-to them (such as if's goto's, gosub's, etc) to be resequenced starting
-at
-.I startnum
-and incremented by
-.I increm.
-If startnum and/or increm are omitted, the default values are 10 and
-10 respectively.
-.TP 8
-.I restore
-Restores the data pointer to the first field of the first "data" statment.
-.TP 8
-.I return
-Return from subroutine called by "gosub" statement.
-.TP 8
-.I rm \ffilename(s)
-Remove file(s). Same as UNIX "rm" command.
-.TP 8
-.I run \fR[prog-name]
-Run basic program specified. If no argument is given, "run" attempts to
-execute whatever is currently in working storage.
-.TP 8
-.I s \fRline#/old-string/new-string[/]
-Substitute in line line# the new-string for the old-string. The last delimiter
-is optional, unless new-string is null in which case it is desired that
-old-string merely be removed.
-See the "undo" command.
-.TP 8
-.I sing \fR[line#]
-Enter the single step mode starting at the line# specified or at
-the first line of the program if no line# is specified.
-In single step mode an instruction is executed and then the prompt '^'
-is displayed.
-At this time the user may enter
-any command (i.e. print) or hit the "return" key to execute the next
-instruction.
-See the "con" instruction.
-.TP 8
-.I size
-Causes amount of storage used and remaining or free space in 
-decimal number of bytes.
-.TP 8
-.I stop
-Stop execution of program.
-.TP 8
-.I save \fR[prog-name]
-Save the contents of working storage in file-name specified by progname.
-If no progname is given last referenced file-name is used. If no file
-name was referenced, the user is prompted for a name.
-.TP 8
-.I undo
-Undo last "s" command or
-.I single line deletion.
-.TP 8
-.I ! (any shell command string)
-Unix shell command invocation allows system commands to be
-executed from the interpreter.
-Not available in restricted version.
-.SH FILE COMMANDS
-The file commands: append, openi, and openo are followed by one or more
-file-names seperated by commas, each file-name being no more that
-14 characters long. Files are assigned to designators (integer values
-between 1 and 8 inclusive) in the order that they are open.
-All commands
-such as "print" and "input" which refer to a file use the designator
-number preceded by a '_' character to refer to that file
-as in: 100 print _1"hello world" or 100 input _3a(x,y) .
-.TP 8
-.I append \fRfile1[,file2,.....,file8]
-If file exists open for output cause new data to be appended. If file
-does not exist, the named file is created.
-.TP 8
-.I openi \fRfile1[,file2,.....,file8]
-Open file for input. File must exist.
-.TP 8
-.I openo \fRfile1[,file2,.....,file8]
-Create named file(s) and open for output. If named files exist, the old
-data is destroyed.
-.TP 8
-.I seek \fR_fildes, offset, mode
-Seek to a line whose position in the file is offset.  If mode = 0 the
-offset is from the beginning, if mode = 1 then the offset is relative
-to the current file pointer.
-.br
-Usage Example: 101 seek _1, 33, 0
-.br
-would cause the file pointer to the 33rd line.
-.TP 8
-.I rewind \fR_fildes
-Rewind the file specified by fildes to the beginning (first line).
-This is effectively the same as seek _fildes, 0, 0.
-.TP 8
-.I close \fR_fildes
-Close file associated with file designator.
-.TP 8
-.I closeall
-Close all files input and output.
-.SH MATH FUNCTIONS
-.TP 8
-.I abs\fR(expr)
-Absolute value.
-.TP 8
-.I atn\fR(expr)
-Arc-tangent.
-.TP 8
-.I cos\fR(expr)
-Cosine.
-.TP 8
-.I exp\fR(expr)
-Natural exponential.
-.TP 8
-.I fact\fR(expr)
-Factorial. (Truncates fractions i.e. fact(3.22) interpreted as fact(3))
-.TP 8
-.I int\fR(expr)
-Integerize or truncate fractional part of result of expr.
-.TP 8
-.I log\fR(expr)
-Natural log.
-.TP 8
-.I rnd\fR(expr)
-Return random number between 0 and evaluated expr.
-.TP 8
-.I sin\fR(expr)
-Sine.
-.TP 8
-.I sqr\fR(expr)
-Square root.
-.SH STRING FUNCTIONS
-.TP 8
-.I asc(string)
-Returns ASCII value of first character in string.
-.TP 8
-.I chr$(expr)
-Return the character corresponding to the value of expr where expr
-is a numerical expression. If the value of the expression exceeds
-octal 177 the least significant 7 bits are used.
-.TP 8
-.I ext$(string,pos,len)
-The ext$ "extract" string function returns a substring of the
-string expression string starting at position "pos" having length "len".
-If attempt is made to extract a string beyond the end of "string" the result
-will be truncated and an error message will be displayed.
-.TP
-.I len(string)
-Return the length of the string expression "string".
-.TP
-.I left$(string,n)
-Return the leftmost n characters of the string. If the string length is
-less than n, then the string itself is returned.
-.TP
-.I loc$(string)
-Converts all upper case alphabetic characters in the string to lower case.
-.br
-EX: a$=loc$("ABCdef123#$^&*")
-.br
-returns abcdef123#$^&* to a$
-.TP
-.I mid$(string,pos,len)
-Does exactly same as ext$. Included because it is part of another
-popular dialect of BASIC.
-.TP
-.I right$(string,n)
-Return rightmost n characters of string. If string length is less than
-n the string itself is returned.
-.TP
-.I str$(expr)
-Returns value of expr (numerical expression) as an ASCII string.
-.TP
-.I string$(n,string)
-Returns n occurrences of the first character in string.
-.TP
-.I upc$(string)
-Converts all lower case alphabetic characters in the string to upper case.
-.TP
-.I val(string)
-Return numerical value represented by ASCII number.
-.br
-Ex: a=val("100.2")
-.br
-assigns the value 100.2 to variable a. This function is good for
-converting ASCII tabulations of numbers. ext$ or mid$ can be used
-to select the column.
-.SH ATS INSTRUMENT COMMANDS
-.TP 8
-.I buspr \fR'busadr(text and expressions)
-Buspr is merely an extension of the print statement which allows
-the print string which would otherwise be displayed on the tty
-to be sent via the IBV-11 bus to the bus address specified by "busadr".
-The ' preceding busadr distinguishes the following character from anything
-other than a single character to be interpreted as an address.
-.br
-Usage Example:	100 buspr '6"F2R";r
-.TP 8
-.I cmd "string"
-Send character string over IBV-11 command lines.
-.TP 8
-.I delay num
-Causes a delay of num 60ths of a second where num is an integer.
-.br
-Usage Example:	100 delay 120		(delay 2 minutes or 120/60ths sec)
-.TP 8
-.I dvminit
-Initialize Digital Voltmeter.
-.TP 8
-.I dvms \fRfunction, range
-Digital voltmeter set command, where: function is "ac", "dc" or "ohms"
-and range is .1, 1, 10, 100, 1k, 10k or "aut". i.e.
-.br
-Usage Example:	100 dvms dc,1k
-.TP 8
-.I hprintf \fR"format text"[,expr1,expr2,...,expr10]
-Formatted print to strip printer. Syntax rules are the same as
-. I printf.
-Strip printer is 20 columns wide, anything past the 20th column is
-truncated.
-.TP 8
-.I lodset \fRlodnum,mode,value
-Set load. Where lodnum an integer describing which load referred to,
-mode is the manner in which the load is set and value is an expression
-describing the current or resistance the load was set to depending on the
-mode. Mode is a single character 'r', 'R', 'i' or 'I' where 'r' is resistance
-mode (value in ohms) and 'i' is current mode (value in amperes). Small
-letter causes a hunt for the value and capital causes set on first try.
-.TP 8
-.I relay \fRfunction, relnum1[, relnum2, relnum3,... ]
-Set multiprogrammer relays. Function is m (make), b (break) or c (clear).
-Function is followed by all relay numbers to be acted upon which may
-be expressions or variables. The clear function when not followed by
-anything, simply means open all relays. When followed by relay numbers,
-clear means all relays are open EXCEPT the ones specified.
-.br
-Usage Example:	100 relay m,10,20,21,a,b,rnd(10)
-.TP 8
-.I ps \fRpsno, voltage, current limit, overvoltage
-Set power supply parameters. Psno is an integer representing the
-power supply number describing which power supply is to be used,
-voltage, current limit and overvoltage are self explanatory. Each
-one of the parameters may be a legal algebraic expression so that
-they may be controlled by the program.
-.br
-Usage Example:	100 dvms 1,10,1,11 or 100 dvms n,v1,i1,v1+1
-.SH INSTRUMENT FUNCTIONS
-.TP 8
-.I btn\fR(expr)
-Button function returns non-zero if control button number (expr) is
-depressed.
-.TP 8
-.I dvmr()
-Return digital voltmeter reading.
-.TP 8
-.I error()
-Return 1 if last instrument command caused instrument error, otherwise
-return 0.
-
-.SH AUTHORS
-Richard B. Drake & James P. Hawkins
-.SH FILES
-source.b
-.br
-/usr/lib/bites/<source>
-.br
-.SH "SEE ALSO"
-sh(1),bstring(1)
-BASIC Programming and Applications, C. Joseph Sass 1972
-.br
-.br
-BITE Users Guide, J.P.Hawkins, Bell Labs, TM-79-2425-4
-.SH DIAGNOSTICS
-Diagnostic error messages are issued by the interpreter
-which indicate syntax errors , system failure, illegal commands or expressions,etc.
-The
-.I LSI-11/03
-Version of
-.I bite
-does not issue explicit error messages, but displays an error number
-in which the meanings are listed below. This is done to regain approx.
-2Kb memory in an already tight LSI-11/03 memory.
-.nf
-.I	Standard Error Messages
-
-	NUMBER	MESSAGE TEXT
-	--------------------
-	0	REFERS TO A NON EXISTING LINE NUMBER
-	1	UNRECOGNIZABLE OPERATION
-	2	CANNOT OPEN FILE
-	3	ILLEGAL VARIABLE NAME
-	4	BAD FILENAME
-	5	WORKING STORAGE AREA EMPTY
-	6	RUNS NESTED TOO DEEPLY
-	7	UNASSIGNED VARIABLE
-	8	EXPRESSION SYNTAX
-	9	BAD KEYWORD IN STATEMENT
-	10	IMPROPER OR NO RELATIONAL OPERATOR
-	11	UNBALANCED QUOTES
-	12	FILE EDITING NOT PERMITTED IN SINGLE STEP MODE
-	13	MISSING OR ILLEGAL DELIMITER
-	14	GOSUB WITH NO RETURN
-	15	IS FATAL
-	16	UNBALANCED PARENTHESIS
-	17	UNKNOWN MATH FUNCTION
-	18	NEXT WITH NO OR WRONG FOR IN PROGRESS
-	19	CANNOT PROCESS IMAGINARY NUMBER
-	20	WHAT ?
-	21	BAD DIMENSION SYNTAX
-	22	TOO MANY DIMENSIONS
-	23	REDUNDANT DIM STATEMENT
-	24	NOT ENOUGH WORKING STORAGE SPACE
-	25	VARIABLE NOT DIMENSIONED
-	26	WRONG NUM OF DIMS
-	27	ONE OR MORE DIMS LARGER THAN ASSIGNED
-	28	NEG. OR ZERO DIMENSION ILLEGAL
-	29	DIVIDE BY ZERO
-	30	BAD TAB SPEC. IN PRINT
-	31	SYS CALL FAILED
-	32	BAD FILE DECLARE SYNTAX
-	33	OUT OF DATA
-	34	FILE-NAME TOO LONG
-	35	FILE DES. USED UP
-	36	FILE NOT OPEN FOR OUTPUT
-	37	FILE NOT OPEN FOR INPUT
-	38	EXPRESSION YIELDS AN IMPOSSIBLE VALUE
-	39	PRINTF: ARG COUNT MISMATCH
-	40	PRINTF: MORE THAN 10 ARGS
-	41	LINE TOO LONG FOR STRIP PRINTER
-	42	MOV REQUIRES 3 LINE #'s SPACING IS OPTIONAL
-.I	String error messages
-	49	STRING VARIABLE IN NUMERICAL EXPR.
-	50	NON-STRING IN STRING ASSIGNMENT
-	51	NUMERIC IN STRING EXPRESSION	
-	52	INVALID STRING OPERATOR
-	53	CANNOT COMPARE STRING WITH NUM. TYPES
-	54	UNKNOWN STRING FUNCTION
-	55	OUT OF STRING RANGE
-
-.I	Test Set and Instrument Error Messages
-
-	100	MISSING ' DELIMITER BEFORE BUS ADDR
-	101	PS: VOLTAGE OUT OF RANGE
-	102	PS: CURRENT OUT OF RANGE
-	103	PS: OVERVOLTAGE OUT OF RANGE
-	104	RELAY ERR
-	105	RELAY: INVALID FUNC.
-	106	RELAY: INVALID NUMBER
-	107	DVM: INVALID MODE
-	108	DVM: INVALID RANGE
-	109	LODSET: IMPROPER NUMBER OF ARGUMENTS
-	110	LODSET: IMPROPER MODE
-	111	LODSET: UNABLE TO SET LOAD
-.fi
-.SH BUGS
-	There are more or less common features not yet available such as
-.I string variables, multiple statment lines, matrix statements
-and the
-.I def
-statement.
-Array variables do not accept reference to 0th elements.
-Bugs will be found as local users write and execute programs and report
-their problems.