Messages in this thread | | | Date | Thu, 3 Dec 1998 16:10:39 +0100 (MET) | From | Hans Lermen <> | Subject | Re: Booting big kernels on IBM ThinkPad 770X |
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On 2 Dec 1998, H. Peter Anvin wrote:
> Followup to: <98120217075102.16084@ws-cal> > By author: Christian Lademann <cal@zls.de> > In newsgroup: linux.dev.kernel > > > > There is this problem with booting big kernel images on IBM ThinkPads: > > the ThinkPad boot-cycles before "Uncompressing linux ...". > > There are already two solutions for this problem: > > > > o Create a zImage instead of a bzImage > > o Boot from DOS with LOADLIN > > > > I think, I've found a third one: > > According to the Technical Reference Manual there is a special > > control port that, among other things, controls the ability of setting > > the A20-gate in real mode, which is initially disabled. It is bit 1 of > > the System Control Port A (0x92). > > > > I inserted a call to the following routine in setup.S just before setting A20 > > and now my bzImage boots! > > > > Let me guess: you're using an old kernel, right? *Sigh*
So what is wrong in using a 2.0.36 kernel?
BTW: if you consider the 'Toshiba Tecra' patch in 2.1.x beeing enough for this odd boot behave on the ThinkPad, sorry, but you are wrong. IMHO Christian's one-liner is just the info we did miss for a long time.
Hans <lermen@fgan.de>
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