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    Woz IIgs w/ AE Vulcan 20mb HDD

    All Woz IIgs were originally ROM 0, then Apple provided a free ROM and video graphics chip upgrade to ROM 1 less than a year later to run newer software written later than late 1987. Tools in ROM were also buggy, fixed in the ROM 1 upgrade. Very few ROM 0 IIgs machines are left as they weren't...
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    Overclocking a Turbo 040 - Results

    I'm also very interested in this! Have a programable ROM (2MB) for my IIci, though with a newly acquired Daystar Turbo 040 I've had to go back to a stock ROM to get it operating (assuming it's the ROM checksum as per http://www.synack.net/~bbraun/macromboot.html .)I do have the ROM programmer so...
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    Woz IIgs w/ AE Vulcan 20mb HDD

    ROM 0 IIgs' were from the first year of production (Sept '86 to Aug '87,) including the first 50,000 limited edition "Woz Edition" (I had one when new!) I believe GS/OS requires ROM 1 or newer and all owners of a ROM 0 IIgs were offered the free upgrade to ROM 1 (chips were upgraded, motherboard...
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