Help with Dreamcast SD card reader...

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spinksy
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Help with Dreamcast SD card reader...

Post by spinksy » Thu Nov 05, 2009 7:39 pm

Right, after making an internal VGA mod on my Dreamcast, a reset button, overclocking it etc I finally want to make the SD card reader.

Now I have soldered 10 wires internally onto the serial port pins (same as in pic)
Image

I have taken the following wire/pin layout drawing from the same website as I got the above picture - a Japanese site.
Image

I just need alittle help with the above drawing - heres how I'm thinking the wires go

serial pin 1 = live - although it dosent need a live does it?
serial pin 2= ??
serial pin 3 = earth
serial pin 4 = to SD pin 7
serial pin 5 = to SD pin 2
serial pin 6 = to SD pin 1 ( and to LED negative?)
serial pin 7 = to SD pin 5
serial pin 8 = (earth)
serial pin 9 = not used
serial pin 10 = live pin of LED? and live pins of 2 capacitors which then go to SD pin 4. (and the negative leg of capacitors go to earth?)

while SD pins 3 & 6 go to earth too.

Is that right? I'm not very good with these types of drawings/plans - I'm just ok with a soldering iron but I'm trying.... :oops:
Dreamcast, it's still thinking.

Over-clocked : Dreamcast currently running at 240Mhz (switchable)

Internal VGA, extra cooling fans, disc activity LED, SD card reader done :-)

Dreamcast HD wanted
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henzenmann
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Re: Help with Dreamcast SD card reader...

Post by henzenmann » Fri Nov 06, 2009 1:44 am

I think you got it all right.
Sonic-NKT
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Re: Help with Dreamcast SD card reader...

Post by Sonic-NKT » Sun Jan 24, 2010 6:17 pm

Is it working?
want to sdmod my dreamcast but i cant get my hands on a coders or vs cable
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Re: Help with Dreamcast SD card reader...

Post by Neoblast » Wed Jan 27, 2010 1:26 pm

We are in the same situation...
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Re: Help with Dreamcast SD card reader...

Post by Sonic-NKT » Wed Jan 27, 2010 2:28 pm

found another howto in the spanish forum:
http://translate.google.de/translate?u= ... =&ie=UTF-8

but it is also a bit confusing, as they say you need a capacitor, a resistor and LED but on the picture the have 2 capacitors but no resistor or led ;)
i think the resistor is only for the led, so if you dont use that you do not need the other one either (brightness of led).

ah i will just buy the parts next week and try it with on of my spare DCs.
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Re: Help with Dreamcast SD card reader...

Post by sqrt(-1)+1 » Sat Jan 30, 2010 3:42 pm

The LED is write indicator and the resistor is needed because a LED has almost no internal resistance and will burn up without it. Should work fine without them, but I haven't tested.
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