<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>We can confirm that this was information that is not made available to the public, as of at least 1-2yrs ago.</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">I don't think this situation has or will change. However, if someone else wants to try again separately, please let the list know.</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">Cheers,<div>J.</div></div><div><br>On Jan 8, 2018, at 17:28, John Paul Adrian Glaubitz <<a href="mailto:glaubitz@physik.fu-berlin.de">glaubitz@physik.fu-berlin.de</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div></div><div>A friend of mine has actually very good contacts inside Renesas and he was also the original porter of Linux on SuperH.</div><div><br></div><div>I can ask him whether he could reach out to some hardware folk, but I cannot promise anything.</div><div><br></div><div>Adrian</div><div><br>On Jan 8, 2018, at 9:00 AM, Francisco Javier Bizcocho Antúnez <<a href="mailto:volkovdablo@gmail.com">volkovdablo@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">Maybe, somebody knowns some person involved with the SH4 CPU?. It just blows my mind how it's possible that this H-UDI subsystem is still top secret after 20 years, and literally it's impossible to get proper documentation.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 8 January 2018 at 06:59, Rob Landley <span dir="ltr"><<a href="mailto:rob@landley.net" target="_blank">rob@landley.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 01/05/2018 02:04 PM, Francisco Javier Bizcocho Antúnez wrote:<br>
> Hello all,<br>
> I'm aware that this might not be ideal forum for this question, but<br>
> hopefully somebody knows something about this.<br>
><br>
> Long story short, I'm trying to hook up a JTAG to a retail Dreamcast<br>
> (SH7750 as you might know), but regardless what I do, it looks like the<br>
> JTAG won't establish a connection succesfully.<br>
><br>
> I have two different probes, an old CodeScape probe, and a new one<br>
> called XrossFinder, and both fail to connect through H-UDI.<br>
><br>
> I manage to gather some of this super secret H-UDI information and they<br>
> refer to something called SH4-EV. I'm hopping that this means, just<br>
> changing some signal so it will start the H-UDI subsystem (like we could<br>
> see in SH3).<br>
><br>
> Any ideas?, I hope that the retail Dreamcast is not carrying a variation<br>
> of SH4 that doesn't support JTAG, but rather it has been "disabled" somehow.<br>
><br>
> Thank you very much in advance.<br>
<br>
</span>Not really my area, but I found<br>
<br>
<a href="https://assemblergames.com/threads/sega-dreamcast-system-ram-16mb-jtag-hack.41785/" rel="noreferrer" target="_blank">https://assemblergames.com/<wbr>threads/sega-dreamcast-system-<wbr>ram-16mb-jtag-hack.41785/</a><br>
<span class="HOEnZb"><font color="#888888"><br>
Rob<br>
</font></span></blockquote></div><br></div>
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