TimHD Posted January 8 Report Share Posted January 8 Speaking of which, is there an authoritative guide to finding legit CPUs - esp the 68040 non-LC 40mhz ones? Did I see once that they no longer make them hence it’s about finding old ones and avoiding fakes/screen printed variants that are slower or actually LC chipsets? Quote Link to post Share on other sites
Kai Robinson Posted January 8 Report Share Posted January 8 @TimHD I use UTSource - plenty of L88M mask Freescale 040's there for about $59 each. Quote Link to post Share on other sites
tokyoracer Posted January 8 Report Share Posted January 8 Oh that's very, VERY nice Bolle. you always find ways to out-do yourself with yet another amazing example to reverse engineering. I don't know how you do it! Definitely still up for a Cache add-on for my Carrera that's sitting in my IIci. To be honest, money-no-object, I'd really love another complete set to put in my IIvx, but really that would probably be a bit wasted in that and would be nothing more then morbid fun to see the lackluster results. Quote Link to post Share on other sites
demik Posted January 8 Report Share Posted January 8 (edited) Very nice ! How does this fit an Iicx ? Do you need another extra board ? Edited January 8 by demik Quote Link to post Share on other sites
jessenator Posted January 8 Report Share Posted January 8 5 hours ago, demik said: How does this fit an Iicx ? Do you need another extra board ? This post shows the MicroMac IIcx adapter for the Carrera Might be a bit of unobtanium these days... Quote Link to post Share on other sites
demik Posted January 8 Report Share Posted January 8 Thanks ! Looks only simple traces to create a PDS slot. Should be straightforward to replicate Quote Link to post Share on other sites
pcamen Posted January 8 Report Share Posted January 8 3 hours ago, jessenator said: This post shows the MicroMac IIcx adapter for the Carrera Might be a bit of unobtanium these days... I gave away two of them a month or two ago. Quote Link to post Share on other sites
trag Posted January 8 Report Share Posted January 8 13 hours ago, Bolle said: I am using a MC88916DW80 which is rated at a maximum of 40/80MHz for the B- and P-clock respectively. The exact same clock generator (although at a lower speed rating) is also found on some Macintosh logicboards. I have seen Turbo040s with 35/70MHz and lower 25/50MHz rating as well. All Carreras I have seen so far have used the 40/80MHz version. Well, if you find a use for the slower ones, I have a reel of 998 of the MC88916DW55... Quote Link to post Share on other sites
Kai Robinson Posted January 8 Report Share Posted January 8 Those are available at https://www.utsource.net/sch/MC88916DW80.html - £2.49 a piece or £2.12 a piece if you buy 10 or more... Quote Link to post Share on other sites
Frobozz Posted January 9 Report Share Posted January 9 Amazingly cool. Quote Link to post Share on other sites
Bolle Posted January 9 Author Report Share Posted January 9 19 hours ago, demik said: Thanks ! Looks only simple traces to create a PDS slot. Should be straightforward to replicate I can provide the schematics of the Micromac IIcx adapter if you want. Got one of those as well. Also mind you will need the more uncommon socketed IIcx logicboard unless you are ready to desolder the CPU on your logicboard and put a socket in place. Quote Link to post Share on other sites
demik Posted January 9 Report Share Posted January 9 (edited) 6 hours ago, Bolle said: I can provide the schematics of the Micromac IIcx adapter if you want. Got one of those as well. Also mind you will need the more uncommon socketed IIcx logicboard unless you are ready to desolder the CPU on your logicboard and put a socket in place. Thanks ! I got two IIcx, one socketed, one soldered. The socketed one isn't starting yet (recap done), Don't want to mess with the working one, I will keep your offer in mind. Good job anyway ! Edited January 9 by demik Quote Link to post Share on other sites
Bolle Posted Monday at 08:27 AM Author Report Share Posted Monday at 08:27 AM Also for bragging rights: No external cache though at that speed, so you're still slower than a 40MHz 040 with 128k external cache. Benchmark speed of the cacheless 50MHz 040 in a SE/30 is in the range of a 50MHz 030 with external cache. Quote Link to post Share on other sites
tokyoracer Posted Monday at 08:41 AM Report Share Posted Monday at 08:41 AM Now that's a fast SE/30! Can we see some Speedometer readings? Quote Link to post Share on other sites
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