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From: storm@cs.mcgill.ca (Marc WANDSCHNEIDER)
Newsgroups: comp.os.msdos.programmer
Subject: byte vs word movs
Message-ID: <1991Jun21.031758.11264@cs.mcgill.ca>
Date: 21 Jun 91 03:17:58 GMT
References: <1991Jun21.030948.10951@cs.mcgill.ca>
Sender: news@cs.mcgill.ca (Netnews Administrator)
Organization: SOCS, McGill University, Montreal, Canada
Lines: 35


Given the following code:

DATA_SEG   SEGMENT PUBLIC
     PUBLIC SECTOR
SECTOR    DB 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22
DATA_SEG   ENDS

Why is the following instruction illegal.... (assuming BX has the value 4)

MOV  DX, SECTOR[BX]

The book I am reading claims that this is because SECTOR is a byte label...

I learned to program Assembler on the PDP11 where I could do the following:

SECTOR:   .byte 10, 11, 12, 13, 14, 15, 16, 17, 18 ..etc

MOV #SECTOR, r1
MOVB (r1)+, r2 
or
MOV (R1)+, r2

Can somebody give me an explanation..?

[If possible, please forward all replies to storm@sizone.UUCP please.  Thanks]

./*-
storm@bart.cs.mcgill.ca
storm@sizone.UUCP
-- 
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storm@cs.mcgill.ca         McGill University           It's 11pm, do YOU
Marc Wandschneider         Montreal, CANADA            know what time it is?
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