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From: dmurdoch@watstat.waterloo.edu (Duncan Murdoch)
Newsgroups: comp.sys.ibm.pc.hardware,comp.lang.pascal
Subject: Re: Turbo Pascal 6.0 code generation for 80286
Message-ID: <1991Mar26.145129.24550@maytag.waterloo.edu>
Date: 26 Mar 91 14:51:29 GMT
References: <1991Mar26.010615.1@rulcri.leidenuniv.nl>
Sender: daemon@maytag.waterloo.edu (Admin)
Organization: University of Waterloo
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In article <1991Mar26.010615.1@rulcri.leidenuniv.nl> vereijken@rulcri.leidenuniv.nl (Jan Joris Vereijken) writes:
>Hi,
> 
>I have run into something very strange: under Turbo Pascal one can choose to
>generate specific 80286 code ($G+ switch). This code is not supposed to run on
>XT-like (8088/8086-based) machines. However, it seems to do...
> 
>Facts:
> 
>   - My system is  V30-based clone, using a BIOS called "PC-SPEED V1.50"
>     (Actually it's a modified Atari ST, it runs about every MSDOS thing
>     just fine. I am sure I have a V30, as I installed it myself.)
>   - I compiled (for 80286) BGIDEMO.PAS, TCALC.PAS and a few (big) things

There's been some discussion of this on Fidonet.  It seems that the $G+
command only generates instructions that are on the 80186; V20 and V30
chips also support these instructions.  There's a list of exactly which
instructions the $G+ command allows in the manual; if you have a V30
manual, you can verify that it supports all of them.

Duncan Murdoch
dmurdoch@watstat.waterloo.edu