Microsoft KB Archive/37301

= Why QuickBASIC's &quot;Generate 68881 Code&quot; Option Dims Out =

Article ID: 37301

Article Last Modified on 11/21/2006



This article was previously published under Q37301



SUMMARY
In the compiler Options... choice on the Run menu of Macintosh QuickBASIC, the &quot;Generate 68881 Code&quot; check box is disabled (marked in dim letters) until you click the &quot;Generate 68020 Code&quot; check box in the Binary Math version. In the Decimal Math version, the &quot;Generate 68881 Code&quot; check box remains permanently disabled because Microsoft QuickBASIC (d) cannot take advantage of the coprocessor.

This feature prevents you from generating 68881 instructions for a machine that could not have this chip.

To generate code that takes advantage of the 68881 math coprocessor, do the following:


 * 1) Run Microsoft QuickBASIC (b), Binary Math version.
 * 2) Click the box labeled &quot;Generate 68020 Code.&quot;
 * 3) Click the box labeled &quot;Generate 68881 Code.&quot;

A program compiled with the 68020 and 68881 options requires the presence of the 68881 math-coprocessor chip at run time.



MORE INFORMATION
The 68881 chip must not be on an accelerator board; it must be built into the Macintosh as standard equipment. QuickBASIC has not been tested with accelerator boards.

Additional query words: MQuickB

Keywords: KB37301

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