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Q605 overclocking ProcSwaps etc. info on elinux.org

Posted by: Trash80toHP_Mini on 2018-04-10 09:26:15 I've never seen this one, found it from the SIMM pic hit while searching for info on the Evil Ras Line Hack. Great stuff. https://elinux.org/Flameman/mac68k

Posted by: trag on 2018-04-11 17:09:04 I don't know, the hardware info about speedups and RAM looks like random cut and pastes from Marc Schrier's clock chipping home page, back when.   And the claim that SIMMs must be single banked is just plain wrong.

Posted by: Trash80toHP_Mini on 2018-04-12 07:57:23 Good to know, THX.. Figured much of the info was cribbed from various sources. The part I found most interesting was the info on alternate (faster) processor part numbers. Do you know of a good source for info on the differences between single and double banked SIMMs and general information on the organization of SIMMs?

Posted by: trag on 2018-04-12 14:52:18 I just figured it out from first principals of how RAM works and the pinouts of memory chips and SIMMs.   There probably is a good article on it somewhere, but I haven't found it. I think I wrote a fair amount of explanation in a posting I did here, where I discussed my testing of various Mac logic boards with 32MB, 64MB and 128 MB SIMMs.   That might have been on the old board before the crash,  I'm not sure any more.   And I've discussed the topic multiple times, so finding a posting by me on that topic isn't necessarily the one with all the careful explanation in it. It was before Braun started doing his magic and increasing the RAM limits on the Q650.

Posted by: Trash80toHP_Mini on 2018-04-13 13:53:54 Nuts! Since the phone SIM it's tough to search for documentation on SIMMs. Since Google became your enemy, finding anything that's not an advert for buying memory, even DuckDuckGo is polluted.  😛 Was it in your thread or a post in another. I wonder if it's easily searched in your "Content I Started" list if it's yourown thread. Dunno if I can find it that way?

Posted by: Trash80toHP_Mini on 2018-04-13 16:50:10 This is the best I've found so far and that was years ago: View attachment DM45-p.3-32M-72-FBD.PDF OOPSIE, thought I'd rotated that. Anyway, it's be how this relates to a 64MB single banked schematic and a 128MB double banked SIMM that intrigues me. Does the double banked SIMM utilize the other pair of RAS lines?

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