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Hardware > GBA<->GC cable schematic.

#392 - Lord Graga - Tue Jan 07, 2003 9:49 am

where can i get a GBA<->GC schematic?

Thank you in advance.

#395 - ampz - Tue Jan 07, 2003 9:55 am

For what purpose?

#418 - MrMr[iCE] - Tue Jan 07, 2003 4:59 pm

hey ampz! long time no see! how come you dont bum around on #gbadev anymore?
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#464 - ampz - Tue Jan 07, 2003 10:50 pm

Sometimes I do.

I vent away for two weeks during xmas thou..

#533 - Lord Graga - Wed Jan 08, 2003 2:58 pm

ampz wrote:
For what purpose?

A standard GBA<->GC cable like the ones you buy in a shop :P

#570 - SmileyDude - Wed Jan 08, 2003 9:23 pm

shouldn't be that tough to get figure out if you happen to have the cable -- just crack it open, and test the connections :) If you don't have one, and I get the chance, I'll try looking at mine for you...
_________________
dennis

#841 - odbc3 - Sat Jan 11, 2003 2:36 am

Seems to be GBC to GBC or GBA to GBA...

http://davidwu_2001.tripod.com/root/

Do you have code to run the link?
I cant find any sample code :(

#858 - Lord Graga - Sat Jan 11, 2003 10:33 am

I asked for a Gameboy Advance <-> Gamecube cable.
BTW, if you want to make a link cable us this site:
http://members.truepath.com/AndrewMay/GBA.html

#1058 - tepples - Tue Jan 14, 2003 6:55 am

Lord Graga wrote:
A standard GBA<->GC cable like the ones you buy in a shop :P

And before anybody responds "Just buy one at the shop", I know of a very good reason why a fellow would want to build one: the standard GCN/GBA cable's huge connector blocks the GBA SP's headphone/charger port.
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#1084 - Flintox - Tue Jan 14, 2003 2:02 pm

The GBA <-> GBA cables which are widely available in the shops here in France does not handle pin 1. It seems that the GBA <-> GC cable handle this pin.

For my part, I am planning to use the GBA <-> GC cable as a TTY/serial cable, in order to avoid to add an external power supply to my cable.

So I am interested by this schematic too.

#1120 - ampz - Tue Jan 14, 2003 8:21 pm

It is possible to modify some kinds of GBA-GBA cables that don't have pin 1. Just move one of the other pins to pin position 1. It's tricky, but with some cables it can be done.

#1129 - Lord Graga - Tue Jan 14, 2003 9:14 pm

I guess that pin 1 is a little un-important, it is just a 5v output.
Hmm....
How can i GBA (2xAA batteries ? 1.5v) create a 5v output?

#1137 - ampz - Tue Jan 14, 2003 10:59 pm

3.3V, not 5V.
And a powersource is not unimportant.


Two AA can be used to produce any output. You just use a step up DC/DC.

#2657 - lahm - Mon Feb 10, 2003 2:16 pm

Pin 1 on the gba is 3.3v and the gamecubes power i am pretty sure is 5v. The internal circuitry is to just convert the votages with transistors. When i had a look at the official cable, coming from the gamecube were +5v, gnd, shield sorta thing that protects the cable from interference or something, and data. So the transistors must take this line and somehow distribute it into the ins and outs and vice versa.

I am planning to modify the cable when i get my sp so that the 5v line can be used to power the gba.

I am pretty sure there is an internal connection on one of the capacitors for 5v.

lahm

australia

#2668 - xponder - Mon Feb 10, 2003 5:24 pm

GBATEK document says
Quote:

8bit-Gamepak-Switch
A small switch is located inside of the cartridge slot, the switch is pushed down when an 8bit cartridge is inserted, it is released when a GBA cartridge is inserted (or if no cartridge is inserted).
The switch mechanically controls whether VDD3 or VDD5 are output at VDD35; ie. in GBA mode 3V power supply/signals are used for the cartridge slot and link port, while in 8bit mode 5V are used.

and my FLUKE multimeter confirmed that.

#2883 - Costis - Fri Feb 14, 2003 7:05 am

Hi,

No, the GameCube's internal voltage is 3.3V as well. The small logic in the cable is probably used to combine the SI and SO signals to form a SIG signal which is both input and output at the same time. The GBA's JOY-BUS protocol uses SI for input and SO for output instead of one I\O pin for both.

BTW, please don't post messages more than once.

Costis

#2929 - tepples - Fri Feb 14, 2003 4:24 pm

Costis wrote:
BTW, please don't post messages more than once.

The rise in multiple posting is partially because of SQL errors that at first glance look like posting failed when in fact it succeeded. The only thing that fails is updating the full-text index.

Even if you get the error message about "word matches", your posts are still getting through.
_________________
-- Where is he?
-- Who?
-- You know, the human.
-- I think he moved to Tilwick.

#5637 - arrid - Sun May 04, 2003 3:11 pm

This is not guaranteed to be correct and it probably isn't.

I just got a (joytech) gc <-> gba cable the other day.

The pin numbering is probably wrong, but here's some diagrams - "back in my day all we needed was really crap ASCII art"

Code:
U1
    ______
1 -|======|- 8
2 -|      |- 9
3 -|      |- 10
4 -|      |- 11
5 -|      |- 12
6 -|      |- 13
7 -|______|- 14

    __
 ___| |___
/ 1  2  3 \
| ------- |
\_4__5__6_/   looking into plug (not socket on gba)


 _________
/ 1  2  3 \
| ------- |
\ 4  5  6 /
 \_______/   looking into plug (not socket on cube)


parts: cable, GC plug, plastic, one 14 pin (philips?) IC, one capacitor (between vcc and ground), GBA plug, screws, etc.

U1 (note: some characters were illegible)
74H?04?
E2609 19
U??0205E

from cube
1 - Ground - U1 7, GBA 6
2 - Data - GBA 2, U1 4
3 - nc
4 - VCC - U1 14
5 - nc
6 - nc

GBA

1 - nc
2 - cube 2, U1 4
3 - nc
4 - U1 1
5 - nc
6 - to ground[/b]

#154060 - bluesceada - Thu Apr 10, 2008 9:07 am

Hmm, why do you think it isn't correct?
Did you open it up and check for it, or did you just guess from outer measurement?

In my cable is something like this [updated]:

[Images not permitted - Click here to view it]

the problem is just to find out what these two 6 pin SMD ICs are, the name is either AX, HE or V47 (I have two cables and found a picture of another online)

The one I made the schematic of was with the two "AX" ICs ...

The problem is I can just find a 3 pin SMD with the smd-code AX.....
Nothing with 6 pins..

Here is a photo of the circuit (just the one side with the parts):
[Images not permitted - Click here to view it]