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Mac SE/30 with IIsi or IIfx ROM running MacOS 8 !

 
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MacOS
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Joined: 19 Jan 2005
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PostPosted: Fri Aug 04, 2006 1:48 pm    Post subject: Mac SE/30 with IIsi or IIfx ROM running MacOS 8 ! Reply with quote

Installing Mac OS 8.0 on an Mac SE/30 with a IIsi or IIfx ROM SIMM.

Note: The author does not claim any responsibility for damage ensuing out of this descriptions. If not explicitly stated the patches have been developed by others and have been succesfully tried and tested. It is still possible that some programs won't run propperly with a patched OS and loss of data can occur !

Although sold as a 32-bit computer, the SE/30 ROM included some 24-bit code, rendering the ROM "dirty". This limited the actual amount of memory that could be accessed to just 8 MB. The solution was to use a program called MODE32 which enabled access to the extra memory (if installed). Alternatively it has been found that replacing the ROM SIMM with one from a Mac IIsi or Mac IIfx makes the SE/30 32-bit "clean" and thereby enables use of up to 128 MB RAM. With some system software modification, it also becomes possible to run OS 8.0 or OS 8.1 (whereas the SE/30 normally can only run up to System 7.5.5).

After a few modifications of the 'system suitcase' you can run OS 8 on a Mac Se 30. The necesary modifications are laid down on this page. Please read the Patch Info.
Additional information can be found on the Home Page of Gamba at http://home.earthlink.net/~gamba2/

Thanks to Vintage Box for the modification on Mac OS 8 & 8.1. to make this happened...
http://www.vintagebox.de/mac68k/macos_p2-en.html

Description:
Following are methods for installing OS 8.0 on an SE/30 with a IIsi or IIfx ROM SIMM.
With these ROM SIMMs Mode 32 is not required and should not be installed.
Minimum hardware requirements: 16 MB RAM, 44 MB free space on hard drive.
Quote:

Installing OS 8.0 on an SE/30 with a IIsi or IIfx ROM SIMM:

    1. Hard drive to have OS 7.0.1 or 7.1, System Picker 1.1a3, ResEdit 2.1.3, Wish I Were,
    Mode32 v7.5 Installer, and os8-030patch.
    2. CD ROM drive to have OS 8.0 or OS 8.1 CD.
    You can also use a external Harddrive (SCSI) with the System Installer.
    3. Turn off SE/30 and install IIsi or IIfx ROM SIMM.
    4. Boot from hard drive OS 7.0.1 or 7.1 and open Mode32 v7.5 Installer.
    Remove Mode 32 v7.5 if it is installed on your system..
    5. In Memory control panel set '32-bit Addressing' to 'On'. Close Memory control panel.
    Note: the PRAM Cache Battery needs to be under power.
    6. Drag Wish I Were control panel and Wish I Were extension to hard drive 7.0.1 or 7.1 System Folder icon.
    Set Wish I Were control panel to 'Quadra 700', close control panel, then reboot.
    7. On the Mac OS 8.1 CD, the OS 8.0 Installer is located at
    Full Install Pieces-->Software Installers-->System Software-->Mac OS 8-->.
    8. Launch the 8.0 Installer with Installer options "Clean Install" and "Easy Install".
    9. After Installer is done, restart with 7.0.1 Disk Tools floppy and do: ResEdit hacks to 8.0 System file:
    ï Replace 'boot' resource 'ID 2' with the same resource from 'os8-030patch.'.
    ï Replace 'gbly' resource 'ID -16385' with the same resource from 'os8-030patch.rsrc'.
    ï 'gusd' resource 'ID 1' at offset '000010', replace data '0016 0006' with data '0009 0005'.
    10. Trash the 'Monitors and Sound' control panel.
    11. From the Apple Extras folder drag both the 'Monitors' and 'Sound' control panels to the System Folder icon.
    12. Use System Picker 1.1a3 to select hard drive OS 8.0 for reboot.
    NOTE: System 7 will now be in 'Previous System Folder'


The methods for installing OS 7.0.1, 7.1, 7.5.3, 7.5.5, 7.6.1, 8.0, or 8.1 on an SE/30 with a IIsi or IIfx ROM SIMM can be found here:
http://home.earthlink.net/~gamba2/os8_se30.html

I have done the procedures with my Mac SE/30 and it works stable.
The only thing to note: The Mac starts with the "SimasiMac" (Horizontal Stripes) for about 5 to 10 seconds after booting, after this moment the MacOS 8.0 starts.

Where to locate the ROM-SIMM on the Macintosh IIsi ?


The ROM-SIMM is not installed on most of the Macintosh IIsi¥s, to find one is a bit of luck. In the picture below you see the location of the ROM-SIMM - again, often this SIMM is not installed.






Where to install to ROM on the Mac SE/30 Logic Board ?


Below you see the ROM-SIMM location on the Mac SE/30 Logic Board (in red border).



External Links:

http://www.vintagebox.de/mac68k/macos_p2-en.html
http://home.earthlink.net/~gamba2/os8_se30.html
RAM Configuration Chart - Apple Developer Center (pdf)[img][/img]
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Last edited by MacOS on Tue Jan 25, 2011 1:03 am; edited 8 times in total
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MacOS
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Joined: 19 Jan 2005
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Location: Berlin, Germany

PostPosted: Tue Aug 22, 2006 3:39 pm    Post subject: Reply with quote

Here are some Photos of my Mac SE/30 running Mac OS 8.1:



The startup process - a few seconds the sreens shows horizontal stripes... the "SimasiMac" effect.



After that some extentions get loaded... With a "custom made StartupScreen"
The ICONS displayed in mini format by using "Conflict Catcher"



The "About this Mac" - as you can see I have installed RAM Doubler what gives
50 MB virtual RAM Smile I can easily start Photoshop 4 on this Mac.!



And just for fun: SoftPC is emulating a complete PC on it - with fascinating performance!
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tano



Joined: 21 Mar 2005
Posts: 51
Location: Mexico

PostPosted: Tue Aug 22, 2006 4:08 pm    Post subject: Reply with quote

Hi, I not yet have had time to try it, in addition the instructions in English, because average I understand them in aim perhaps this weekend tries or the next one or LOL
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MacOS
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PostPosted: Sat Dec 13, 2008 1:36 pm    Post subject: Reply with quote

December 2008:

I had to wash the MotherBoard because of leaking capacitors. The Mac did only start with Simansi Mac Pattern. Now it boots correctly again and I have upgraded to Hardware Hardware 36 MB using 4 MB Roms from some Mac LCs.
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tano



Joined: 21 Mar 2005
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Location: Mexico

PostPosted: Sat Jan 22, 2011 8:29 pm    Post subject: Reply with quote

I opened one of my SE/30 and has installed a ROM-SIMM card but, I do not know if a IIfx,
could work to install mac os 8 on my SE/30? Question Question

I see very little activity in the forum :(
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MacOS
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PostPosted: Sun Jan 23, 2011 1:04 am    Post subject: Reply with quote

Hi Tano,

a IIfx ROM SIMM should work (if it is the original IIfx ROM SIMM, often now the IIfx is shipping around with an already switched ROM SIMM).

I have installed the ROM SIMM on my SE/30 and set up the HD on an external SCSI Harddrive which was later installed in the SE/30.
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Last edited by MacOS on Tue Jan 25, 2011 1:06 am; edited 1 time in total
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tano



Joined: 21 Mar 2005
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Location: Mexico

PostPosted: Sun Jan 23, 2011 5:06 am    Post subject: Reply with quote

I may not explain it right ...
I want to know if the ROM-SIMM is installed on my SE/30 is a IIfx Question


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PostPosted: Tue Jan 25, 2011 1:01 am    Post subject: Reply with quote

Because of the 1988 copyright I think it is the original from the Mac SE/30.
The IIfx was sold from 1990 to 1992.
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