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Home Forums 68kMLA Q605/LC475 (onboard) ram upgrade. — #19
Post #19 by Trash80toHP_Mini
Source Forum68kMLA
Category68k
Post DateMon, 30 Dec 2013 - 16:10
Original URLhttps://68kmla.org/bb/threads/q605-lc475-onboard-ram-upgrade.29515/
Post
Trash80 - The 605's removable ribs hidden within the deeper, flat-n-feeted case . . .. . . now you can work out the mapping for 320MB or 512MB of 72-pin SIMMs in the 605! }:)
yeah that would be pretty bad-ass to epoxy a 72pin simm slot to the bottom of the PCB and run some wires :)
Nope, you'd be soldering the SIMMs to an adapter PCB soldered/socketed directly to the MoBo, nestled between the remaining ribs of the intact bottom surfaced case.

but not through the rom slot holes . . .with 512 megs of ram in a q605,,,,,,,,,,,,,,,,,,,,, we will need to disable the ram test for sure!-- so the rom slot will be needed for sure. ( and a special bin )
Who said anything about not using a ROM SIMM, just move that to the adapter to make room for most of the wires, it sits on part of the same address/data/control line bus as the RAM, with a few ROM specific signals added, IIRC. Voila! Holes to spare! [}:)] ]'>

if someone were to accomplish this… it would be the Mac HAC of 2014 :) does bbraun want to take this on is the question 8-) ?
I hope he decides to get involved in this as well, I'm working out the funneling issues for using inexpensive 72-pin SIMMs already, albeit v-e-r-y slowly! ::)

mp.ls