Microsoft KB Archive/26812

NOP Generated with Forward Reference ID Number: Q26812

5.00 MS-DOS buglist5.00 fixlist5.00a

Summary:

The logical operators, “OR” or “AND”, on a forward reference immediate data will cause a NOP to be generated.

The following demonstrates the problem:

sym1 db 10 OR byte ptr sym1, sym2 sym2 equ 1

Microsoft has confirmed this to be a problem in Version 5.00. This problem was corrected in MASM Version 5.00a. Please call Microsoft Product Support Services at (206) 646-5109 and request an update to MASM Version 5.00a.