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| Author | 7.6.1 on upgraded Mac Plus with external hard drive (Read 11534 times) | ||||||||||||||||||||||||||
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Old Mac Geezer
64 MB  Posts: 112 
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on: February 19, 2007, 21:43
Can it be done?? |
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dpaanlka
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1024 MB Posts: 1646
Reply #1 on: February 19, 2007, 21:48
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Pretty sure no. Never had a Mac Plus, not sure if it can be hacked. But it isn't officially supposed to work.
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wove
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1024 MB Posts: 1363
Reply #2 on: February 20, 2007, 00:58
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OS 7.6 requires 32bit ROMS which the Mac Plus does not have. 7.5.5 is the highest system which can be installed on a Mac Plus. Although it was common at the time of System 7.X to upgrade Pluses to System 7, from a performance stand point they will do best with some version of System 6. bill
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Old Mac Geezer
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64 MB Posts: 112
Reply #3 on: February 22, 2007, 20:09
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Do you mean 32 bit "clean" ROMS??
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wove
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1024 MB Posts: 1363
Reply #4 on: February 23, 2007, 01:56
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Quote from: "Old Mac Geezer" Do you mean 32 bit "clean" ROMS?? In common usage that is what I meant. Apple ROMs are either 24bit or 32bit and are not really clean or dirty. Apple made several machines, MacII, MacIIx, SE/30, etc that have the hardware necessary to run 32bit software, yet came with 24bit ROMs. The 68000 processor can only run 24bit software. The 68020 processor can use 32bit software if it has an optional MMU, and the 68030 can use 32bit software with out the need for additional hardware. The patch, Mode32 developed by Connectix and purchased by Apple enabled these machines to run 32bit software. However Apple limited support for OS 7.6 to machines that same with 32bit ROMs and so the above mentioned machines will not run OS 7.6. On the SE/30 the ROM is socketed and can be replaced with a ROM from a Mac IIfx, which will allow you to install OS 7.6 on an SE/30. By the same token killing IIfx machines to run OS7.6 on an SE/30 is not a good idea. bill
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Old Mac Geezer
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64 MB Posts: 112
Reply #5 on: April 13, 2007, 22:25
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Quote from: "wove"
I have to agree with that. The IIfx is one of the fastest of all the Mac II machines, if not the fastest, so stripping parts off of it to upgrade a slower model makes no sense.
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Old Mac Geezer
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64 MB Posts: 112
Reply #6 on: April 13, 2007, 22:31
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Darn, no editing. I wanted to say in the last post, the Mac Plus can only go as far as 7.5.5, but in reality you would be better to stick to 6.0.8 as System 7 really bogs down those early machines if you still have a 68000 CPU. It is similar to the zippiness you feel using 7.6 and then seeing how much everything slows down when you move up to System 8 or 9.
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