[Coco] Super IDE vs. Drive Pak

[Mark McDougall]

On 17/11/2011 1:58 PM, John Kent wrote:


> 2003/2004 was about the time I was using CF cards with my FPGA 6809 system.

> The IDE interface is much easier to understand than SD & SDHC.


Has anyone looked to see if there are IDE/CF<->SD adapters available?

I'm using an SD card in my "Coco with S-IDE". I use quotes, because it's all 
in an FPGA, running stock HDB-DOS. I've wrapped a proprietary IDE<->SD 
converter layer around the standard Opencores IDE controller core, so the 
'S-IDE' thinks it's talking to a CF.

Unfortunately, atm, the IDE<->SD converter is read-only; that is, it only 
supports reading the SD card. But there's not a lot to it, and I'm wondering 
if you could do a small board with a CPLD in it that does the same for a 
real CF<->CF adapter?

Then again, not really sure why people are so hell-bent on SD vs CF?!? For 
all practical purposes, isn't the only difference that you're sticking one 
in the CF slot of your mutli-card reader, and the other in the SD/MMC slot?

Having said that, USB would be nice. But now you're looking at a USB 
host-enabled micro, emulating an IDE device (which is very doable BTW).

Regards,

-- 

|              Mark McDougall                | "Electrical Engineers do it

|  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"