![]() The adapter is the rather unattractive jumble of wires you see in the photo at the top. Remember those two enable signals I mentioned, important for daisy-chaining, but not present on the Emu or Emu cable? Yesterday I put together a hand-made DB19 to IDC20 adapter on a breadboard, along with an external logic chip, and got the Floppy Emu working successfully while daisy-chained as 3.5 drive #2. That’s why I need as much info as I can get from other Floppy Emu users who’ve tried this firmware on their IIgs.įortunately there’s some good news among all of this. At this point, I think we’ve narrowed it down to either being a hardware problem with this specific Emu board or IIgs, or else a behavior difference between ROM01 and ROM03. Why does this work so poorly for him, when it works well for me? We’ve stepped through troubleshooting ideas by email, including removing the hard drive and other cards, but nothing seems to help. They only thing that works is booting ProDOS from the hard drive, then doing CATALOG,S5,D1 to view the contents of the Floppy Emu disk. If he boots GS/OS from a hard drive while the Emu is attached, he sees an error about the “AppleDisk3.5 driver” midway through boot-up. ![]() But he can’t boot from the Emu: a ProDOS floppy image just hangs, and GS/OS floppy images start to boot, but eventually fail with errors like “Unable to load START.GS.OS file. He’s got the Emu board connected directly to the DB19 port on his IIgs, and is using the Floppy Emu Apple II firmware, just like my setup. Yesterday I heard from somebody for whom the Apple II firmware isn’t working correctly, on a ROM03 IIgs. This is because the extension cable I use, as well as the Emu itself, lacks two enable signals that are important for daisy-chaining. The only limitation is that the Emu can’t be daisy-chained behind an Apple 3.5 Drive, making it 3.5 drive #2. I can read and write to the emulated disk, eject it and insert a different disk image, no problems. I can boot the IIgs from it, using either ProDOS or GS/OS disk images. On my IIgs (ROM01 with 512K RAM and no other cards), I can connect the Floppy Emu to the DB19 port, load its Apple II firmware, and it works fine as Apple 3.5 Drive #1. Now I need help from anyone with the necessary hardware – could you take a few minutes to try it out, and let me know the results? I need as much information as I can get about compatability with different ROM versions and system configurations. I posted the new Apple II firmware, so anybody with an Emu board and a IIgs could try it for themselves. Last week I wrote about Apple II 800K disk emulation for Floppy Emu, which I used to boot my Apple IIgs.
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