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Q34937: Segment Combine Type AT with Equate Variable Causes Problem |
/pubs/pc/reference/microsoft/kb/Q34937/ |
Article: Q34937
Version(s): 5.10
Operating System: MS-DOS
Flags: ENDUSER | buglist5.10
Last Modified: 12-JAN-1989
The sample code below demonstrates a problem with the equate directive
and the segment combine type AT.
The segment bios_seg incorrectly evaluates to 0 in the mov
instruction. If the equate statement is located before the bios-seg
segment definition, the segment bios_seg correctly evaluates to 40h.
Microsoft has confirmed this to be a problem in Version 5.10. We are
researching this problem and will post new information as it becomes
available.
The following is a sample code:
code segment public 'code'
assume cs:code
bios_seg segment at BIOS
bios_seg ends
BIOS equ 40h
start:
mov ax,bios_seg
code ends
end start