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Date:      Thu, 30 Oct 1997 11:29:50 -0800
From:      Jonathan Mini <mini@d198-232.uoregon.edu>
To:        Christoph Kukulies <kuku@gilberto.physik.RWTH-Aachen.DE>
Cc:        freebsd-emulation@FreeBSD.ORG
Subject:   Re: pcemu - unimpl opcodes / NOGO
Message-ID:  <19971030112950.48455@micron.mini.net>
In-Reply-To: <199710301709.SAA20511@gil.physik.rwth-aachen.de>; from Christoph Kukulies on Thu, Oct 30, 1997 at 06:09:14PM %2B0100
References:  <199710301709.SAA20511@gil.physik.rwth-aachen.de>

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  It looks like what's happening is that the boot sector on that disk doesn't
contain any boot code. Offhand, I'd say that it's not really a DOS 3.2 disk.

(0000:7c00 is the boot strap location. The first sector of the disk is read
into there and executed. 0000:B8008  is in the videomemory of the CGA/EGA/VGA
when in text mode. So, it's trying to run the contents of the simulated text
mode)

Christoph Kukulies <kuku@gilberto.physik.RWTH-Aachen.DE> stands accused of saying:
>  pcemu                                                
> isdn-kukulies# pcemu    <window pops up>
> Error: Unimplemented opcode 37 at cs:ip = 0000:7C04                       
> Error: Unimplemented opcode 37 at cs:ip = 0000:7C04
> Error: Unimplemented opcode 3F at cs:ip = 0000:FFFB                       
> Error: Unimplemented opcode 37 at cs:ip = 0000:7C04              
> Error: Unimplemented opcode 6D at cs:ip = 0000:B8008
> Error: Unimplemented opcode 6D at cs:ip = 0000:B8008
> Error: Unimplemented opcode 6D at cs:ip = 0000:B8008  
> Error: Unimplemented opcode 6D at cs:ip = 0000:B8008
> Error: Unimplemented opcode 6D at cs:ip = 0000:B8008
> Error: Unimplemented opcode 6D at cs:ip = 0000:B8008     
> Error: Unimplemented opcode 6D at cs:ip = 0000:B8008
> 
> And so on.
> (it was difficult to fins a 720 K floppy and the only one I could find
> was one from a box of ATARI diskettes which was labeled DOS 3.2 )
> 
> -- 
> Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de

-- 
Jonathan Mini 					Ingenious Productions
Software Development				P.O. Box 5693,
						Eugene, Or. 97405

 "A child of five could understand this! Quick -- Fetch me a child of five."



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