Q39256: QuickBASIC May Not Function with 25-MHz 80387 Coprocessor
Article: Q39256 Product(s): See article Version(s): 4.50 Operating System(s): MS-DOS Keyword(s): ENDUSER | SR# S881212-11 | mspl13_basic Last Modified: 4-SEP-1990 Customers have reported that QuickBASIC version 4.50 does not function correctly with a 25-MHz 80387 math-coprocessor chip. The reported problems include the following: 1. Incorrect floating-point numeric results 2. Coprocessor not detected The problem does not occur on 80387 chips slower than 25 MHz. Microsoft has not tested QuickBASIC version 4.50 with 25-MHz 80387 chips. To test potential problems, you can compare numeric results with and without the coprocessor by turning the coprocessor on or off. The following command in MS-DOS turns off access to the coprocessor in the current boot session (where any message with one or more characters must follow the "="): SET NO87=Coprocessor is currently disabled. The following command makes the coprocessor accessible again (where no characters follow the "="): SET NO87=
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