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From: ong@d.cs.okstate.edu (ONG ENG TENG)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Trouble getting LIM/EMS working on 286/NEAT
Message-ID: <1991Mar9.223309.5262@d.cs.okstate.edu>
Date: 9 Mar 91 22:33:09 GMT
References: <1991Mar8.191923.21984@hri.com>
Organization: Oklahoma State University
Lines: 55

From article <1991Mar8.191923.21984@hri.com>, by mull@sparc26.hri.com (Chris Mullendore):
> I recently purchased a 20MHz 286/NEAT motherboard which advertized
> LIM/EMS 4.0 compatability.  I have 2MB in memory bank 0 (no
> interleaving... sigh).  With it came the Expanded Memory Manager device
> driver, NEATEMM.SYS, made by Chips and Technology, and a small doc file.
> 
> The doc file seems to indicate that no parameters are necessary to the
> driver and that it reads the default parameters that were established by
> extended setup from the NEAT hardware.  It also says that if the default
> parameters are "wrong", the driver will detect this and issue the
> message "The EMS setup has been incorrectly specified.  No EMS is available."
> 
> I've tried many different variations of the extended setup, but I always
> get the undescriptive error message above.  I tried all "EMS Base Memory
> Addr" from C400, C800, ..., F000.  I also tried all "EMS Base I/O Addr"
> from 208/209, 218/219, ..., 2E8/2E9.  I have not tried all combinations
> of the two.
> 
> Is it true that the device driver does not need any parameters?
> 
> Does anyone know what the constraints are for getting a proper EMS setup?
> 
> My extended setup is as follows:
> 
> 	BIOS Rom:			Enabled
> 	Video Rom:			Enabled
> 	Shadow 16K at C4000:		Disabled
> 	Shadow 16K at C8000:		Disabled
> 	Shadow 16K at CC000:		Disabled
> 	Shadow 16K at D0000:		Disabled
> 	Shadow 16K at D4000:		Disabled
> 	Shadow 16K at D8000:		Disabled
> 	Shadow 16K at DC000:		Disabled
> 	Shadow 16K at E0000:		Disabled
> 	Shadow 16K at E4000:		Disabled
> 	Shadow 16K at E8000:		Disabled
> 	Shadow 16K at EC000:		Disabled
> 	Memory Wait States:		0 wait states
> 	640K-1024K Relocation:		Enabled
> 	EMS Base Memory Addr:		DC00
> 	EMS Base I/O Addr:		208h/209h
> 	EMS Page 0 Register Extension:	1M to 2M
> 	EMS Page 1 Register Extension:	1M to 2M
> 	EMS Page 2 Register Extension:	1M to 2M
> 	EMS Page 3 Register Extension:	1M to 2M
> 	EMS Memory Size:		2.0M
                                        ^^^
Hold on there, cowboy.  If you allocate 2Mb for EMS, what is left 
for conventional memory?  

I got the NEAT chipset on both a 286 12MHz and a 386SX, 
and they both work fine.  On the 286 12MHz I got 2Mb too 
and allocate 1Mb for EMS in the setup (press DEL on boot),
and it works perfectly.  I also *disabled* the 640k-1024k 
relocation.