RE: [Gc-linux-devel] Building a SD card adapter

[Rob R. <ro...@re...>]

Hi Shaun,

I checked and doublechecked your layout with my working adaptor and the
only difference I can find is that you use pin 7 (GC) for 3v3 and I use
pin 4. Should be the same, so I think your layout is ok. Check
conductance/open circuit of all wires and, if you have an oscilloscope,
you could try to catch the clk and dout signals. If you would open up
your GC you could check if the contact with the GC is ok for all pins.

Also, have you noted that SDLOAD requires the SD card to be in slot A
while my kernel driver requires it to be in slot B? Quite important :).

Good luck fault finding. Hope I helped you.

Rob

> -----Oorspronkelijk bericht-----
> Van: gc-...@li... 
> [mailto:gc-...@li...] Namens 
> Shaun Jackman
> Verzonden: Saturday, April 09, 2005 7:40 PM
> Aan: gc-...@li...
> Onderwerp: Re: [Gc-linux-devel] Building a SD card adapter
> 
> 
> Hi Rob,
> 
> The mask [1] I sent you is reversed. The layout I just posted 
> [2] is not reversed. The SD card is inserted upside down, so 
> on the reversed mask pin 8 is to the left, and pins 1 and 9 
> are to the right. I've posted a photo of the adapter [3] with 
> an SD card inserted. I can see scrape marks across the copper 
> fingers where the GameCube's contacts have made connection, 
> so it looks like the contacts are in the right place and at 
> the right height.
> 
> Is any specific type or size of SD card required? My SD card 
> is labelled "SanDisk SD Card 32 MB".
> 
> Thanks for your help! Cheers,
> Shaun
> 
> [1] http://www.sfu.ca/~sdj/gcsd/gcsd-mask.png
> [2] http://www.sfu.ca/~sdj/gcsd/gcsd-layout.png
> [3] http://www.sfu.ca/~sdj/gcsd/gcsd-photo.jpg
> 
> On Apr 9, 2005 2:15 AM, Rob Reilink <ro...@re...> wrote:
> > Hi Shaun,
> > 
> > I cannot see clearly which pin is which. Could you:
> > -put some text on the copper laywer with your layout 
> program (if you 
> > used one) so I can see clearly whether this is mirrored or not (PCB 
> > layouts are always printed mirrored and then fabricated 
> with the ink 
> > laying on the copper so the real pcb gets unmirrored) 
> -indicate which 
> > is, according to your schematic/interpretation pin 
> 1/2/11/12 on the GC 
> > side and pin 1 of the MMC/SD adaptor -show the connections 
> between the 
> > big square pads -put a photo online so it becomes clear 
> which way the 
> > SD is inserted.
> > 
> > Also you should make sure the contact is ok. I had to insert a 1mm 
> > plastic strip under the pcb to get the correct height, just 
> like the 
> > plastic cover of a 'real' mem card does.
> > 
> > Regards, Rob
> 
> 
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