ID Number: Q83087
6.00 6.00a | 6.00 6.00a
MS-DOS | OS/2
buglist6.00 buglist6.00a buglist6.00b
Summary:
PROBLEM ID: MSM9204001
SYMPTOMS
Microsoft Macro Assembler (MASM) versions 6.0 6.0a and 6.0b may move
a segment register instead of generating an error on an invalid code
statement. In the following example, the statement
mov bx, es[1234h]
should generate an error. However, MASM treats the statement as
mov bx, es
and thus does not generate the code that may be expected. The code
that the user anticipated being generated was:
mov bx, es:[1234h]
STATUS
Microsoft has confirmed this to be a problem in MASM versions 6.0
and 6.0a. We are researching this problem and will post new
information here as it becomes available.
More Information:
The following program should generate two assembler errors but does
not:
Sample Code
-----------
; Assemble options needed: none
.MODEL small
.386
.CODE
start:
mov bx,es[1234h] ; This should generate an error.
mov es[1234h],bx ; This should generate an error.
mov ax, 4C00h
int 21h
END start
Additional reference words: 6.00 6.00a