Boot ROM chip

Discussion in 'Mac Pro' started by yumdrum, Apr 3, 2008.

  1. yumdrum macrumors newbie

    Apr 2, 2008
    Is the Boot ROM chip or ROM boot chip (not sure which is correct) located on the Logic Board or on the daughter processor board?
  2. kbfr08 macrumors 6502

    Mar 16, 2007
    They're located on the main board. The picture is from Apple's Power Express Prototype, which had 2 socketed chips; your mac may have only 1 socketed, or soldered chip. Some macs also have a ROM card slot, pictured as well.

    I'm not sure about the ROM card slot, I believe that it is the brighter brown (by the 6 PCI slots, above the CPU card slot).

    Attached Files:

  3. Firefly2002 macrumors 65816

    Jan 9, 2008
    Whoa. That is way too weird.

    I was going to come and say "hey, you're lucky you don't have the boot chips from the Power Express PowerMac 9700 prototype... they were buggy and didn't work :p

    Then, I looked at the picture, and was going to say whoaaaa.... that looks an awful lot like the Power Express motherboard.

    Then I read the above comment, and was like, oh, right. That's because it is the Power Express motherboard.

    How ****ing outlandishly unlikely is that?

    But yeah, it's on the logic board. The light brown slot is actually the PDS slot where the processor goes, the darker brown one is the ROM slot, though the PEx and 9600s had the ROM on the MoBo, not in a DIMM slot (I've actually got a 9600 a few feet away from me). Apple had ROM slots on all their old PowerMacs, whether they were soldered to the board or not. Not sure why.

    The big white slot is actually a 64-bit, 50 MHz (yep... 50) PCI slot (for extra bandwidth) intended for an AV video card that was canceled along with the PEx.

    They wouldn't look like those, of course.... those are flash ROMs, since the developers were frequently making changes to the toolbox, OpenFirmware, etc. The ROM on the MoBo would just be black chips.
  4. kbfr08 macrumors 6502

    Mar 16, 2007
    It's not my PEx, it's just a picture from AF. Is the AV video card you're talking about the Apple FireDrill?
  5. Firefly2002 macrumors 65816

    Jan 9, 2008
    I know it's not yours, I was reading the old AppleFritter forum thread from 2005-2006 a couple days ago. Pretty interesting.

    Yes, I believe it was the FireDrill.

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