CF cards on classic machines (was Re: Another disk imaging project)

[Curt at Atari Museum]

On the Atari front - the "myide" interface for Atari XL/XE computers is 
a plug in cartridge that can use standard IDE drives and using an IDE to 
CF interface works great with CF cards as well.


Curt



Ethan Dicks wrote:

>On 8/4/05, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
>  
>
>>Yes, from what I rememebr, a CF card can be made to look very much like
>>an IDE drive.
>>    
>>
>
>In this vein, I'm fiddling with CF cards on a variety of machines
>(C-64 w/IDE-64, SBC-6120 w/IOB-6120 and with external CF interface,
>Elf 2000 w/ElfDisk board...) and am running into what might be
>compatibility issues with older CF cards.
>
>I've found a variety of web resources googling around, but does anyone
>have any information about when there might have been a sea change in
>CF features between the days of 4MB cards and "modern" 512MB cards? 
>Specifically, I have a stack of HP 4MB CF cards that work with many
>devices.  Those and some 8MB and 16MB cards (Kodak, SanDisk, etc, not
>brandless ones), don't seem to work reliably in some of my devices
>(IDENT failing, as one example) but in the same device, my Elf2K for
>example, the 1GB card came right up with the expected manufacturer
>string.
>
>So was there some change starting with, say, 32MB or 128MB cards,
>about timing or some other issue that might affect something as simple
>as reading the device registers from the embedded controller?  In case
>it matters, AFAIK, the problems I'm having are only with using a CF
>card in a strictly 8-bit mode (something that CF cards do that "real"
>IDE drives do not).
>
>I'm not thinking this is something subtle - I'm thinking that someone
>might remember some warning somewhere about "oh, yeah... don't use
>16MB cards in _that_ device... you have to use 32MB or newer".  Any
>and all impressions accepted.  I'm not the creator of any of these
>devices, so I have to kinda nibble around the problem from the edges
>before I try any sort of attempts at a fix.
>
>Of course, a pointer to a white paper on how to talk to CF cards in
>8-bit mode would be most welcome.  :-)
>
>Thanks,
>
>-ethan
>
>
>
>  
>


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