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Subject: Re: 2nd ATA Device on JB20 Recorder

Re: 2nd ATA Device on JB20 Recorder

From: Andrew Jamieson <>
Date: Wed, 22 Jan 2003 12:33:09 +1100

It would probably work in USB mode when both the HDD and CF card have thier master/slave set up right (both the ISD200 and ISD300 support multiple LUNs). I'd be a bit worried about the effect of un-terminated stubs on the IDE bus during high speed transfers tho.

For the Archos to transfer the files automatically (ie non-USB), you'll need Rockbox support of course ....

And dont forget that CF cards use 3.3V power, not 5V.

Andrew Jamieson
----- Original Message -----
  From: roland
  Sent: Wednesday, January 22, 2003 11:45 AM
  Subject: Re: 2nd ATA Device on JB20 Recorder

  Hey, nobody out there who could give a guess regarding
  possible chances for success of this plan ?

    ----- Original Message -----
    From: roland
    Sent: Saturday, January 18, 2003 6:59 PM
    Subject: 2nd ATA Device on JB20 Recorder

    Hi !
    Does anybody think, this (still fictional) hardware-mod is worth a try ? (also see attached pic)

    I`d like to use my Jukebox as a backup device for compact flash cards (digicam).
    Since CF cards are true IDE/ATA devices, perhaps this works. I already have some experience
    with passive CF2IDE adapters. (booting Linux from that)

    I`m also not shure, if could "see" 2nd. device from within rockbox without too much effort.
    If there is a chance, that a master/save combination can be handled with existing
    archos hardware, perhaps I will disassmble my JB and look onto PCD how HDD is being interfaced.

    Yes - we need to add code there - but maybe this is not too difficult.
    CF usually are formatted witch fat12 or fat16 - can existing fat32 driver code handle that, or do I
    need addidtional driver code?
    I read the isd300 manuals and I`m quite optimistic, at least ISD300 can handle 2 devices
    Master/Slave Selection
    Bit (5)
    Device number selection. This bit is valid only when "Skip ATA/ATAPI
    Device Initialization" is active. Under ISD-300A control ("Skip
    ATA/ATAPI Device Initialization = '0'), the value is ignored.
    0 Drive 0 (master)
    1 Drive 1 (slave)
    But as i see - ISD300 is ONLY needed when interacing to usb!? So we don`t really need support for 2nd
    device of ISD300 - since what we get would be just "another" USB CF Card reader - and they are cheap today
    - anyway ;)

    Please tell me, what you think regarding chances for success on that.

    Shure , that "hack" won`t fit into the original JB case - but I will build a new case around my JB soon, anyway.
Received on 2003-01-22

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