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Write a subroutine that performs a fixed point multiply. It should accept two unsigned 16-bit parameters and return the result in AX. The input...

This question was answered on May 06, 2010. View the Answer
Write a subroutine that performs a fixed point multiply. It should accept two unsigned 16-bit parameters and return the result in AX. The input numbers are not integers but fixed point numbers. The radix point is located after bit 8 (i.e. 00100000.00010000). Alternatively in hex, a value of 20.10h corresponds to 20h +10h/100h = 32.0625 in decimal. The result should be returned in the same format with the radix point after bit 8. Assume the main program pushes the 2 parameters on the stack before calling your subroutine (using a near call). Restore all registers, except flags and AX, modified by your subroutine. In case of overflow, set the result to its maximum value FFFFh and set the CF.

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This question was asked on May 06, 2010 and answered on May 06, 2010.

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