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From: Finn Thain <fthain@telegraphics.com.au>
To: Brad Boyer <flar@allandria.com>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Max Staudt <max@enpas.org>,
	linux-m68k <linux-m68k@lists.linux-m68k.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-ide@vger.kernel.org
Subject: Re: [PATCH] m68k: defconfig: Update defconfigs for v5.4-rc1
Date: Tue, 5 Nov 2019 15:13:31 +1100 (AEDT)
Message-ID: <alpine.LNX.2.21.1.1911051444570.160@nippy.intranet> (raw)
In-Reply-To: <20191105031946.GA31507@allandria.com>

On Mon, 4 Nov 2019, Brad Boyer wrote:

> 
> I'll try the PB190 first anyway. It should be easier due to not needing 
> to setup a monitor. 

I think you can put the 630 into a standard VESA video mode (with MacOS or 
Linux) given the right adapter/cable. I have a pin-out somewhere.

> I'm not sure if I ever booted Linux on either of them, since I acquired 
> both about the time I started getting too busy to spend time on such 
> things. I just found the Performa, and it's actually a Performa 630CD 
> but I don't see any obvious difference based on the specs.
> 
> I just took a look at the macide driver, and it appears to do basically
> nothing other than pass a list of addresses into the core ide code. It's
> one of the smallest drivers I've ever seen.
> 

The fly in the ointment is interrupt handling. There is a theoretical bug. 
(Though it doesn't seem to hurt in practice.)

AFAIK the hardware is publicly undocumented and so we need to do 
experiments like this:
https://github.com/fthain/linux/commit/01405199e8d05500bf458df690027655f526a7fd

My suspicion is that macide_clear_irq() does nothing useful. It's not 
called on a Powerbook 190. Maybe it is needed on a PowerBook 150 and 
Performa 630, maybe not...

> > But watch out for leaking capacitors and batteries...
> 
> I should pull out every machine in my collection and look for those 
> sorts of issues. None of them have been checked in at least 5 or 6 
> years.
> 

None of the machines in my collection have any batteries now. Desoldering 
the Ni-Cd PRAM battery from a Powerbook 14x/16x/170/180 is difficult but 
necessary. Powerbook 150 and 190 are easier (no desoldering needed).

-- 

> 	Brad Boyer
> 	flar@allandria.com
> 
> 

  reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20191001073539.4488-1-geert@linux-m68k.org>
2019-10-07 14:11 ` Max Staudt
2019-11-04 11:06   ` Geert Uytterhoeven
2019-11-04 21:15     ` Max Staudt
2019-11-05  0:01     ` Christoph Hellwig
2019-11-05  0:14     ` John Paul Adrian Glaubitz
2019-11-05  0:53       ` Brad Boyer
2019-11-05  2:33         ` Finn Thain
2019-11-05  3:19           ` Brad Boyer
2019-11-05  4:13             ` Finn Thain [this message]
2019-11-05 20:36               ` Brad Boyer

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