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Cx4 Pinout 
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Joined: Sat 01 Dec 2012, 01:50:23

Posts: 240
Location: Oregon, USA
Post Re: Cx4 Pinout
Cx4 pin 61 is /IRQ. Guess I missed that when I was continuity tracing. Too bad I can't edit my original post. :/

Tue 13 Aug 2013, 03:35:17

Joined: Thu 17 Sep 2009, 12:08:38

Posts: 66
Location: Australia
Post Re: Cx4 Pinout
hunterk wrote:
MarkGrass wrote:
Do you know of documentation, SDK, examples... anything available for developers?
http://wiki.superfamicom.org/snes/show/Capcom+Cx4+-+Hitachi+HG51B169

The information on that page only relates to Megaman X2/X3. You should be able to search these forums for information on the cx4. There are no official documents, everything has been reverse engineered.

http://users.tpg.com.au/advlink/dsp/cx4.html

Thu 22 Aug 2013, 03:45:44

Joined: Fri 10 Apr 2009, 22:30:48

Posts: 3797
Location: Salem, Oregon
Post Re: Cx4 Pinout
nice work qwertymodo

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Sat 24 Aug 2013, 08:56:26
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Joined: Sat 01 Dec 2012, 01:50:23

Posts: 240
Location: Oregon, USA
Post Re: Cx4 Pinout
I just realized something about the /CE pins. On RMX2, with 2x32-pin ROM chips, Cx4 pin 26 goes to pin 22 on the first ROM (/RCE1), Cx4 pin 27 goes to pin 22 on the second ROM (/RCE2), and Cx4 pin 56 goes to pin 31 on both ROMs (/ROE). However, on RMX3, with 1x36-pin ROM chip, Cx4 pin 52 goes to ROM pin 24 (/RCS) and ROM pin 33 (/ROE) is connected to Gnd. So my original post where I stated that for single-chip boards, /RCE1 was connected to ROM /CE was incorrect. I'm not sure if this is how normal (MAD-1, no coprocessor) 2-ROM carts handle the wiring, but it does seem similar to the usage of the /HI and /LO pins on the MAD-1 for 2-ROM boards.

Also, pin 51 seems to be tracking /WR, but I'll need an oscilloscope to see how the timing lines up.

Sun 15 Dec 2013, 04:46:45
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Joined: Sat 01 Dec 2012, 01:50:23

Posts: 240
Location: Oregon, USA
Post Re: Cx4 Pinout
qwertymodo wrote:
I just realized something about the /CE pins. On RMX2, with 2x32-pin ROM chips, Cx4 pin 26 goes to pin 22 on the first ROM (/RCE1), Cx4 pin 27 goes to pin 22 on the second ROM (/RCE2), and Cx4 pin 56 goes to pin 31 on both ROMs (/ROE).


Pin 56 was a typo, I meant pin 52, but I'm unable to edit my previous post. byuu, is there any way you could enable post editing? I can't edit the original post, either, so I'm stuck with adding comments every time I want to add or change something, and anybody coming into this thread would have to read through the entire thing to get the accurate information :/

Tue 17 Dec 2013, 20:25:23

Joined: Fri 10 Apr 2009, 15:00:08

Posts: 13668
Post Re: Cx4 Pinout
I capped the post editing to a 24 hour window.

Had an asshole go through and erase all old posts when he rage quit a long time ago on another board. It totally broke lots of threads because he had thousands of posts.

I'm a bit limited by what phpBB offers. I'd love to allow a person to always edit their post if their post was the very last in a thread. Same for deleting a post. But not once people have responded. It'd also be nice to allow an "owner-post" style so a creator can keep editing a field in the first thread post. That'd be my ideal system.

Tue 17 Dec 2013, 22:15:14
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Joined: Sat 01 Dec 2012, 01:50:23

Posts: 240
Location: Oregon, USA
Post Re: Cx4 Pinout
Do you, as admin, have the ability to edit other peoples' posts, outside the 24-hour window, without changing that setting system-wide? If so, tonight when I get home I'd like to double-check and consolidate some of the info I've come up with since the original post and have it merged into the original post for the sake of anybody who stumbles across this thread from elsewhere and doesn't read through the entire thread... I understand why you have it set up that way, but in this instance, it's kind of problematic...

Tue 17 Dec 2013, 22:39:55
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Joined: Sat 01 Dec 2012, 01:50:23

Posts: 240
Location: Oregon, USA
Post Re: Cx4 Pinout
Thanks for enabling post editing. OP is updated :)

Sun 26 Jan 2014, 09:51:32
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