Microsoft KB Archive/27103

Most Significant Bits in DX, Least in AX ID Number: Q27103

5.00 MS-DOS docerr

Summary:

SYMPTOMS Page 312 of the “Microsoft Macro Assembler 5.0 Programmer’s Guide” incorrectly states “the most-significant bits will be in AX, the least-significant bits will be in DX” when documenting the mul and imul instructions.

The sentence should state that “the most-significant bits will be in DX, the least-significant bits will be in AX.”

STATUS Microsoft has confirmed this to be a problem in MASM version 5.0. This problem was corrected in MASM version 5.1.