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From: rcollins@altos86.Altos.COM (Robert Collins)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Problems with 286 in protected mode
Message-ID: <3840@altos86.Altos.COM>
Date: 20 Aug 90 16:50:37 GMT
References: <90228.001800JJLUCSY@MTUS5.BITNET> <1301@gold.GVG.TEK.COM>
Reply-To: rcollins@altos86.UUCP (Robert Collins)
Organization: Altos Computer Systems, San Jose, CA
Lines: 29

In article <1301@gold.GVG.TEK.COM> grege@gold.GVG.TEK.COM (Greg Ebert) writes:
>Real vs Protected mode
>----------------------
>
>What does all this mean ? Perhaps the Tandy system doesn't have the necessary
>hardware to emulate a reset via the keyboard controller. If you like to
>
>My guess is that your 286 is entering protected mode, but can't get back into
>real mode because the hardware kludge is missing.
>
You want to reset the '286 without using they keyboard controller?
Try this:

HOSE_IDTR	DQ	0
RESET_286	PROC
	LIDT	HOSE_IDTR
	mov	ax,0
  	mov	ds,ax
	lodsb
RESET_286	ENDP

Guaranteed, that will reset the '286.


-- 
"Worship the Lord your God, and serve him only."  Mat. 4:10
Robert Collins                 UUCP:  ...!sun!altos86!rcollins
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