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Date: Tue, 12 Mar 2002 17:58:09 +0100
From: Martin Dalecki <dalecki@evision-ventures.com>
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To: Vojtech Pavlik <vojtech@suse.cz>
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Subject: Re: [patch] My AMD IDE driver, v2.7
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Vojtech Pavlik wrote:
> On Tue, Mar 12, 2002 at 05:43:17PM +0100, Martin Dalecki wrote:
> 
>>Vojtech Pavlik wrote:
>>
>>>On Tue, Mar 12, 2002 at 05:26:20PM +0100, Martin Dalecki wrote:
>>>
>>>
>>>>Vojtech Pavlik wrote:
>>>>
>>>>
>>>>
>>>>
>>>>>Well, as much as I'd like to use safe pre-computed register values for
>>>>>the chips, that ain't possible - even when we assumed the system bus
>>>>>(PCI, VLB, whatever) was always 33 MHz, still the drives have various
>>>>>ideas about what DMA and PIO modes should look like, see the tDMA and
>>>>>tPIO entries in hdparm -t.  
>>>>>
>>>>>
>>>>Yes yes yes of course some of the drivers are confused. And I don't
>>>>argue that precomputation is adequate right now. It just wasn't for
>>>>the CMD640 those times... I only wanted to reffer to history and
>>>>why my timings where different then the computed.
>>>>
>>>>
>>>We may want to compare your original timings to what ide-timing.[ch]
>>>will compute ...
>>>
>>Unfortunately there is no chance. I have abondony this board quite
>>happy a long time ago... It was an 486 and I don't keep old
>>shread around. Sorry I just don't have it at hand anylonger.
>>
> 
> You may happen to have the numbers, though - that should be enough.
> 
> Btw, I have a CMD640B based PCI card lying around here, but never
> managed to get it generate any interrupts, though the rest seems to be
> working.

I remember that I have found them in some readme attached to the
original dos drivers from CMD. Maybe it's still availabe on the net but
really I don't have it anylongeranywhere archieved. And BTW.> The CMD640B was
the variant which wasn't physically broken, as the CMD640 which had
improper bus termination of the secondary channel.