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1993-11-09
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191 lines
Bywater Software Announces
Bywater BASIC Interpreter/Shell, version 2.10
---------------------------------------------
Copyright (c) 1993, Ted A. Campbell
for bwBASIC version 2.10, 11 October 1993
DESCRIPTION:
The Bywater BASIC Interpreter (bwBASIC) implements a large
superset of the ANSI Standard for Minimal BASIC (X3.60-1978)
and a significant subset of the ANSI Standard for Full BASIC
(X3.113-1987) in C. It also offers shell programming facilities
as an extension of BASIC. bwBASIC seeks to be as portable
as possible.
This version of Bywater BASIC is released under the terms of the
GNU General Public License (GPL), which is distributed with this
software in the file "COPYING". The GPL specifies the terms
under which users may copy and use the software in this distribution.
A separate license is available for commercial distribution,
for information on which you should contact the author.
IMPROVEMENTS OVER PREVIOUS VERSION (1.11):
* now compilable on "stock" (older K&R specification) C compilers;
* implements ANSI-BASIC-style structured programming, with
called subroutines, multi-line functions, multi-line IF-THEN
ELSE statements, SELECT CASE statements, etc.;
* new enhancements to the interactive environment, such as DO NUM
and DO UNNUM to number or unnumber all program lines;
* addition of some hardware-specific commands such as CLS, LOCATE,
and INKEY$ (at present for IBM PC and compatibles, using the
Microsoft QuickC compiler), opening the way for more hardware-
specific commands and functions in the future;
* general improvements to reliability and portability, including
more extensive testing than previous versions;
OBTAINING THE SOURCE CODE:
The source code for bwBASIC 2.10 will be posted to network news
groups and is available immediately by anonymous ftp. To obtain
the source code, ftp to site ftp.eng.umd.edu, cd to pub/basic and
get the file bwbasic-2.10.tar.gz.
COMMUNICATIONS:
email: tcamp@delphi.com
A LIST OF BASIC COMMANDS AND FUNCTIONS IMPLEMENTED in bwBASIC 2.10:
Be aware that many of these commands and functions will not be
available unless you have set certain flags in the header files.
ABS( number )
ASC( string$ )
ATN( number )
CALL subroutine-name
CASE constant | IF partial-expression | ELSE
CHAIN file-name
CHDIR pathname
CHR$( number )
CINT( number )
CLEAR
CLOSE [[#]file-number]...
CLS
COMMON variable [, variable...]
COS( number )
CSNG( number )
CVD( string$ )
CVI( string$ )
CVS( string$ )
DATA constant[,constant]...
DATE$
DEF FNname(arg...)] = expression
DEFDBL letter[-letter](, letter[-letter])...
DEFINT letter[-letter](, letter[-letter])...
DEFSNG letter[-letter](, letter[-letter])...
DEFSTR letter[-letter](, letter[-letter])...
DELETE line[-line]
DIM variable(elements...)[variable(elements...)]...
DO NUM|UNNUM
DO [WHILE expression]
EDIT (* depends on variable BWB.EDITOR$)
ELSE
ELSEIF
END FUNCTION | IF | SELECT | SUB
ENVIRON variable-string$ = string$
ENVIRON$( variable-string )
EOF( device-number )
ERASE variable[, variable]...
ERL
ERR
ERROR number
EXIT FOR|DO
EXP( number )
FIELD [#] device-number, number AS string-variable [, number AS string-variable...]
FILES filespec$ (* depends on variable BWB.FILES$)
FOR counter = start TO finish [STEP increment]
FUNCTION function-definition
GET [#] device-number [, record-number]
GOSUB line | label
GOTO line | label
HEX$( number )
IF expression THEN [statement [ELSE statement]]
INKEY$
INPUT [# device-number]|[;]["prompt string";]list of variables
INSTR( [start-position,] string-searched$, string-pattern$ )
INT( number )
KILL file-name
LEFT$( string$, number-of-spaces )
LEN( string$ )
LET variable = expression
LINE INPUT [[#] device-number,]["prompt string";] string-variable$
LIST line[-line]
LOAD file-name
LOC( device-number )
LOCATE
LOF( device-number )
LOG( number )
LOOP [UNTIL expression]
LSET string-variable$ = expression
MERGE file-name
MID$( string$, start-position-in-string[, number-of-spaces ] )
MKD$( number )
MKDIR pathname
MKI$( number )
MKS$( number )
NAME old-file-name AS new-file-name
NEW
NEXT counter
OCT$( number )
ON variable GOTO|GOSUB line[,line,line,...]
ON ERROR GOSUB line | label
OPEN O|I|R, [#]device-number, file-name [,record length]
file-name FOR INPUT|OUTPUT|APPEND AS [#]device-number [LEN = record-length]
OPTION BASE number
POS
PRINT [# device-number,][USING format-string$;] expressions...
PUT [#] device-number [, record-number]
RANDOMIZE number
READ variable[, variable]...
REM string
RESTORE line
RETURN
RIGHT$( string$, number-of-spaces )
RMDIR pathname
RND( number )
RSET string-variable$ = expression
RUN [line]|[file-name]
SAVE file-name
SELECT CASE expression
SGN( number )
SIN( number )
SPACE$( number )
SPC( number )
SQR( number )
STOP
STR$( number )
STRING$( number, ascii-value|string$ )
SUB subroutine-name
SWAP variable, variable
SYSTEM
TAB( number )
TAN( number )
TIME$
TIMER
TROFF
TRON
VAL( string$ )
WEND
WHILE expression
WIDTH [# device-number,] number
WRITE [# device-number,] element [, element ]....