>>>>> "SG" == Stéphane Guillard <stephane.guillard@steria.com> writes:

SG> Now my turn for a question. I've done a full ATA/ATAPI PIO/UDMA
SG> driver for the AmigaOne (basically a PowerPC mainboard with a VIA
SG> southbridge). It works fine with HDD's & CD's, but a user recently
SG> reported that when he hooks a compactflash card to the IDE bus
SG> with the ad hoc adapter, my driver wont deal with it.

SG> As I have neither had a CF in my hands, nor an adapter, could you
SG> tell me if there is anything specific to these toys ? I have the
SG> multivolume ATA(PI) docs but a hint such as 'poweron signature is
SG> neither ATA nor ATAPI but 0xblablabla would be highly appreciated
SG> before I dive again in those docs.

The boot code I wrote for the C1 computer detects devices by sending
identify and identify packet commands. Compact Flash cards show up as
regular hard drives. If you wish to distinguish CF cards from HDs, the
ATA docs say:

  "Devices reporting the value 848Ah in IDENTIFY DEVICE data word 0 or
  devices having bit 2 of IDENTIFY DEVICE data word 83 set to one
  shall support the CFA feature Set."

-- 
    ___          .     .  .         .       . +  .         .      o   
  _|___|_   +   .  +     .     +         .  Per Olofsson, arkadspelare
    o-o    .      .     .   o         +          MagerValp@cling.gu.se
     -       +            +    .     http://www.cling.gu.se/~cl3polof/



In article <4059907d$0$18765$636a15ce@news.free.fr>, 
stephane.guillard@steria.com says...
> Hi Rich,
> 
> Now my turn for a question. I've done a full ATA/ATAPI PIO/UDMA driver for
> the AmigaOne (basically a PowerPC mainboard with a VIA southbridge). It
> works fine with HDD's & CD's, but a user recently reported that when he
> hooks a compactflash card to the IDE bus with the ad hoc adapter, my driver
> wont deal with it.
> 

Stephane,

The first thought that comes to mind from the situation you describe:
Is the CF adapter properly forcing the CF card into "TRUE IDE" mode?
In other words, is pin 9 of the CF socket grounded?

Also, is the user removing and reinserting the CF card after power was 
applied? This is not allowed in "True IDE" mode.
Here is a relavant excerpt from the SanDisk CF product manual:

>Removing and reinserting the CompactFlash
>Memory Card while the host computer=3Fs power is on
>will reconfigure the CompactFlash Card to PC Card
>ATA mode from the original True IDE Mode. To
>configure the CompactFlash Card in True IDE
>Mode, the 50-pin socket must be power cycled with
>the CompactFlash Card inserted and -OE (output
>enable) grounded by the host.

If the CF card is indeed in TrueIDE mode and attached correctly,
I would assume your ATA/ATAPI code would work. I would look closely
at the adapter!  I have found the Adtron SDDA-03 adapters works well.

If I can be of additional help, feel free to email me directly at: 
rich@dreher.net

Sincerely,
Rich