<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Remember IBM and Moto were pretty thick over the years.  Moto created MECL (Motorola ECL for IBM for System 360) in the mid-1960s.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr"><font color="#0000ff">On Tue, Sep 12, 2023 at 4:11 PM Dave McGuire via rescue <<a href="mailto:rescue@sunhelp.org" target="_blank">rescue@sunhelp.org</a>> wrote:<br></font></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><font color="#0000ff"><br>
   Since the 68K's control store is in mask ROM on the chip, I think<span class="gmail_default" style="font-family:arial,helvetica,sans-serif"> </span>that would be a challenge.</font><br></blockquote><div><span class="gmail_default" style="font-family:arial,helvetica,sans-serif">IBM licensed it, and the same person wrote the ucode for both chips, <a href="https://streaklinks.com/BqH_EOyXl14e_YW88g2ki55r/https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FNick_Tredennick" target="_blank">Nick Tredennick</a> </span> <span class="gmail_default" style="font-family:arial,helvetica,sans-serif">[awesome guy, BTW].</span></div><div><span class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></span></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">After he had moved to IBM ("Jerktown" as he called it), Nick and the IBM team later relaid out the chip t create the u370:</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><img src="cid:ii_lmgsj04x0" alt="2023-09-12 17.49.25.jpeg" width="422" height="562"><br></div><div><br></div><div><font face="arial, helvetica, sans-serif">W</font>hen I was a grad student<span class="gmail_default" style="font-family:arial,helvetica,sans-serif"> @ UCB (where he was giving away thew above swag)</span>,<span class="gmail_default" style="font-family:arial,helvetica,sans-serif"> Nick said that</span> IBM had two metal layers in their process which was why it was faster that original 68000.  IIRC Moto got the IBM process for the<span class="gmail_default" style="font-family:arial,helvetica,sans-serif"> 68020 and I >>think<< they used a common process for the PPC.</span><br></div><div><span class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></span></div><div><span class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></span></div></div></div><div hspace="streak-pt-mark" style="max-height:1px"><img alt="" style="width:0px;max-height:0px;overflow:hidden" src="https://mailfoogae.appspot.com/t?sender=aY2xlbWNAY2NjLmNvbQ%3D%3D&type=zerocontent&guid=16845293-6859-470c-9d9a-adbf512f0307"><font color="#ffffff" size="1">ᐧ</font></div>