10 REM*************************************************************************
20 REM* THIS IS A TEST PROGRAM WRITTEN TO DOCUMENT THE SCREEN GRAPHICS BUGS   *
30 REM* UNDER MBASIC ON THE OSBORNE EXECUTIVE I AS OF 18 DEC 1983.  THIS      *
40 REM* PROGRAM ILLUSTRATES THE FACT THAT CHARACTER STRINGS 9 AND 27 ARE NOT  *
50 REM* INTERPRETED AT ALL, AND ARE SIMPLY IGNORED.  HOWEVER, RUNNING THE     *
60 REM* PROGRAM MAKES OBVIOUS THE FACT THAT THE GRAPHICS CHARACTERS REPEAT,   *
70 REM* AND THAT SUBSTITUTING CHARACTER STRING 137 FOR 9 AND 155 FOR 27 (ONLY *
80 REM* WHEN USED AS AS A GRAPHICS CHARACTER, NOT AN `ESCAPE') WILL SOLVE THE *
90 REM* PROBLEM.  THIS IS THE FIX USED TO PATCH `OTHELLO.BAS', FOR INSTANCE.  *
95 REM*                     JIM SWITZ                                         *
96 REM*             FOG EXECUTIVE LIBRARIAN                                   *
97 REM*************************************************************************
120 PRINT
130 PRINT
140 FOR I = 0 TO 255
150 PRINT CHR$(27)+"g";
160 PRINT I;CHR$(I);
170 NEXT I
180 PRINT CHR$(27)+"G"
190 END

130 PRINT
140 FOR I = 0 TO 255
150 PRIN