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TP7 overlay problem on PentiumII 233 MMX

Posted on 1997-12-18
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Last Modified: 2010-04-16
I have a problem with a DOS Borland Pascal 7 application.
This program run with an .EXE file and an .OVR file (overlay).
No problem with W95,WINNT4 and DOS on PC from 386 to Pentium1
The problem appairs with the new Pentium II 233 MMX from COMPAQ.
(with NT4 pack3).
On this machine, the program crash sometimes (1 of 2 times), and send a
RUN TIME error 200 (division by zero).
After test, i suppose that the cause is the execution of the
OVRINIT command in my source.

Please HELP me !
Eric
SNCB.CIM.FL@SKYNET.BE
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Question by:lgc5800
2 Comments
 
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by:
omsec earned 200 total points
ID: 1216989
I think it is an error cos u are using Windows NT. There are some differents compared to win 95. Have u installed Dos 6.22 there ? Try to run it in REAL, CLEAN DOS not in Windows - Dos-Box. Another possible couse maybe that the brandnew PII - Processor is constructed different as the first generation. Intel add there some new things to improve the speed. If ya see it's a hardware based problem, then try to load ur data directly into EMS and not to use Borland's Overlay system. Routines to access EMS or XMS can ya get at htt://garbo.uwasa.fi there is a Pascal - Directory

greets, Omsec
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Author Comment

by:lgc5800
ID: 1216990
I have found the solution myself on compuserve pascal site.
The cause is that pentium II processor speed is too high.
A patch for this CRT unit problem is ready on this pascal site.
Thanks everybody.

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