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Hmm - that’s not what I expected. For single sided 5 1/4 inch drives, the read/write head faced up - so the bottom disk surface stored the data.

If you have some 1/2 inch, 3/4 inch or 1 inch standoffs, you could mount the board at different heights and record the results. Maybe mounting metal shielding between the drive and board, between two spacers.

The OP wanted to use 2 sides of a 720K (800K) as separate disks. Same for 1.4 MB disks. I was just pointing out 720K disks are getting quite scarce and the price rises with scarcity. The OP wants to pursue these experiments. I don’t share the enthusiam.

Yes, they are all double-sided. Never said otherwise.

Good luck with your experiments. New 720K floppy disks are becoming difficult to find and currently sell for twice the price of 1.4 MB floppy disks according to https://www.floppydisk.com/

InterwebPPC was crashing on some websites. Aquafox works on the problem websites.

I have an eMachines 19 inch monitor from 2008 that has VGA and DVI inputs and it’s worked great with my Centris 610 and it has worked great at displaying 640x480, 832x624 and 1024x768. The native resolution of the monitor is 1440 x 900.

Aquafox 1.0 for G3 and G4 running OS X Tiger and Leopard, was just released on November 5, 2024. It's supposed to be an update of InterwebPPC. Download link at Macintosh Repository https://www.macintoshrepository.org/75479-aquafox Anyone try this yet?

Not possible With a 3.5 inch disk, because you can’t insert them upside down. This is possible with 5.25 inch floppies, because you can insert the disk upside down.

FYI there’s lots of work being done to enhance the emulator with the RP2350 chip - see open issue #7 on the GitHub https://github.com/evansm7/pico-mac/issues/7

Having fun with the Pico Micro Mac. I connected the Pico to the board using a 5 inch IDE cable - works fine.

Ron’s Computer Video is selling a custom board, based on the Pico Micro Mac. Assembled, less the Raspberry Pi Pico for $10 plus shipping. You can also buy the completed assembly with the Pico soldered and programmed for $20 plus shipping https://jcm-1.com/product/picomicromac/ Now that...

Capacitor liquid is partially conductive. Capacitor residue between IC legs is causing low voltage readings, because there are weak shorts between IC legs. The residue must be removed around ICs.

Can’t you use the Startup Disk Control Panel to select your startup drive?

The Raspberry Pi is an inexpensive single board computer that has lots of GPIO pins and runs Linux. The RPi uses a MicroSD card as disk storage. Using a modern PC or Mac, you install the Raspian OS onto a MicroSD card (8 GB or larger) using the Raspberry Pi Imager program...

Another alternative If you have a newer G3 or G4 Mac, 1.44 MB 3.5 inch floppy drives are cheap. Ebay has multiple listings for VST Technologies, Portable USB Floppy Disk Drive 1.44mb, MAC Sealed for $19.95+shipping.

You can try VirtualPC 2, which is available on macintoshgarden. You want the DOS version, which has these system requirements: Any PowerPC 601, 603, 603e, 604, 604e, and G3 running at 100mhz or faster recommended Mac OS 7.5.5 or later RAM Requirements: 20MB installed physical RAM minimum - 24MB...

I was a Manufacturing Engineer in the PCB business for many years. My opinion is someone has intentionally applied WAY more current to that board than was required. 500 mA at 5V (USB maximum) will not blow those large traces off the board. You need about 100V at 15 Amps to do that kind of damage.

I look forward to the Pico 2 and related boards. All those improvements on the Pico 2 will cost you a whopping $1 over the price of the original Pico...

i would install a PC emulator on your Mac. Insert the disk and confirm you can read the directory and copy files from your emulated PC. If you have a PowerPC Mac, you can install Virtual PC (old commercial software). If you have an Intel Mac or newer, you can install the free PC emulators...