Article: Q39525
Product(s): See article
Version(s): 5.00 | 5.10
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | buglist5.10 | mspl13_masm
Last Modified: 12-JAN-1989
MASM Versions 5.10 and earlier have the register operands reversed for
ARPL as follows:
ARPL AX, CX
It should have an operand byte of C1 instead of C8.
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 code demonstrates this problem and should assemble to
"63 C1":
dosseg
.model small
.386p
.code
start:
ARPL AX, CX
end start
.........................................................................
1 dosseg
2 .model small
3 assume cs:@code,ds:@data,ss:@data
4 .386p
5 .code
6 0000 _TEXT segment 'CODE'
7
8 0000 start:
9 0000 63 C8 ARPL AX, CX
10 end start
11 0002 @CurSeg ends
..........................................................................