Q58564: 4.50 Must Reset PALETTE After WIDTH 80,60 in SCREEN 12

Article: Q58564
Product(s): See article
Version(s): 4.50
Operating System(s): MS-DOS
Keyword(s): ENDUSER | buglist4.50 SR# S900201-95 B_BasicCom | mspl13_basic
Last Modified: 21-SEP-1990

When using the WIDTH 80,60 statement in SCREEN 12 of a BASIC program,
you must reset the palette or you cannot change attributes 8 through
15 of the 16-attribute palette.

The following code example demonstrates this problem when executed in
Microsoft QuickBASIC version 4.50 or Microsoft BASIC Professional
Development System (PDS) version 7.00 for MS-DOS.

Microsoft has confirmed this to be a problem in Microsoft QuickBASIC
version 4.50 and in Microsoft BASIC Professional Development System
(PDS) version 7.00 for MS-DOS (buglist7.00). This problem was
corrected in BASIC PDS 7.10 (fixlist7.10).

To change the palette in the program, you must reset the palette using
the PALETTE statement (with no arguments) after you use the WIDTH
80,60 statement.

This behavior in the above product versions differs from QuickBASIC
versions 4.00 and 4.00b and Microsoft BASIC Compiler versions 6.00 and
6.00b, where you do not need to reset the palette after WIDTH 80,60.

Code Example
------------

     SCREEN 12
     WIDTH 80, 60
     'PALETTE         'Remove the quote to make it work correctly.
     count = 0
     FOR y = 0 TO 375 STEP 25
        LINE (y + 2, y + 2)-(y + 25, y + 25), count, BF
        count = count + 1
     NEXT y
     FOR x = 1 TO 15
        PALETTE x, 63   ' Should change all boxes to same color.
     NEXT x
     END

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