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"Removing the clock battery won't be so bad, right?"

The Power Macintosh 7100/66 is one of the first PowerPC-based Macs. It also has a horrible internal design.


Machine ID
PowerPC 601 @ 66 MHz
L2 Cache
40 MiB (8 MiB soldered, 2x 16 MiB SIMMs)
ROM Revision
Floppy Disk Drive
3.5 inch, 1.4 MB
"Card ID 96"
1 MiB
270.73 MB Quantum LPS270S (SCSI ID 0)
Optical Drive
Matshita CD-ROM CD-8004


  • If you are trying to boot into Copland, you can't start holding down the Caps Lock key too early or it won't be detected, and you can't start holding it down too late or you'll already be booting into System 7.5.
  • If you set the DB-15 adapter to VGA mode, the video adapter flips a coin on reboot to see if the display is detected as 1024x768 @ 70 Hz, 640x480 @ 60 Hz, or as something that is definitely incompatible with my monitor.
  • It doesn't like booting from certain Classic Mac OS CD-ROMs that should be bootable.
  • Whether or not the speaker works is decided by a coin flip on each reboot.


  • 2021-12-17: The computer arrives at my apartment from an eBay seller.
  • 2021-12-21: 📉 The clock battery is removed.
  • 2021-12-21: ⚠️ Three small pieces of plastic, which look like part of hooks, break off from the inside of the case. I am unable to determine where they broke off from, but the computer does not feel any more fragile after reassembling.
  • 2023-07-26: The computer is temporarily transported back to my parents' place.
  • 2023-07-26: The decaying rubber feet are removed.
  • 2023-08-06: 📈 The hard disk is replaced with a BlueSCSI v2.
  • 2023-09-27: The computer is transported to the new home.