Q64022: Watch Value Can Display Incorrect Value of Far Memory

Article: Q64022
Product(s): See article
Version(s): 2.50
Operating System(s): MS-DOS
Keyword(s): ENDUSER | s_quickasm | mspl13_c
Last Modified: 25-JUL-1990

If the sample code is compiled with debug information, a watch window
set on the "fptr" pointer will display incorrect values.

Sample Code
-----------

#include <stdio.h>
unsigned char far * fptr;
void main()
{
     int c;
     fptr=(unsigned char far *)0xd0000600;
     for (c=0; c < 50; c++)
          printf("%d\n", fptr[c]);
}

When fptr[c] is displayed as a watch value entry, it will show values
that are different than the output screen. QuickC 2.00 and CodeView
show the same watch value as the output screen.

Microsoft is researching this problem and will post new information
here as it becomes available.

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