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Quadra 605 RAM

And now you know why System 7 sucks on a 68000 based machine. Even a stripped configuration eats up all the RAM. Even taking Dana's 7mb cache setup into consideration, System 7 is still a pig on early Macs.
Too true. No 32-bit addressing, for starters, so forget Mode32. CFM-68K crashes it. Retrofitting of AppearanceCDEV and its Extension gives irremediable address errors. And on, and on. A couple of wasted days in outcome, but a fair degree of learning in my recent/current resuscitation of a rather nice 4MB (80ns, to match the RAM on expansion card and MLB) Classic 'Rev. B' whose only fault is an apparent need for resoldering of the video-in card's connections to the CRT. After several hours of use, or in a Summer ambience, the 3:1 chequers appear at restart, and all further startup activity ceases. No chime. No nuttin'.

But there is one happy note: it will run TattleTech 2.59, which is useful if not as complete as 2.84 on later Macs.

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Now you just need a SIMMDoubler so you can install *two* 128MB SIMMs in your Q605. :-)

Of course with the doubler sticking up, you can't really close the lid...
Unless you retrofit a IIsi lid on it.... :D

 
Thankfully someone helped you with the RAM and turning on 32-bit addressing. That's all it was. Also, System 7 was awesome with 680x0 machines. It sucked on PPC boxes since it and all the apps ran in emulation. I can't believe all the erroneous posts on this board.

FYI I owned a 605 and you can overclock it by unsoldering and switching two surface mount resistors on the underside of the logic board. I did it safely. You might not want to try. The information might not be available. And I have forgotten the resistor locations. But you can do it.

 
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