Re: Floppy disk emulator for Lisa

What excellent work!

I'm not sure I could bear to part with my Lisa 1 for your experimentation, but if there's any way I can help remotely, please let me know. I have an IDEfile ProFile emulator, which means that you could send me code to run in the form of a ProFile hard disk image. I don't know exactly what bootable code on a ProFile looks like, but someone must, given that it's possible to install BLU on one.

(I don't think the Lisa has a killer poke---let's hope not!)

It's also not hard for me to send you logs of BLU's serial port diagnostics. My M key works, too :-)

--Tom

On Wednesday, March 4, 2015 at 10:02:42 PM UTC-5, Steve Chamberlin wrote:
>
> Good question, sorry I wasn't specific. It emulates 400k and 800k Sony
> floppy drives. I think Twiggy emulation with the same hardware should be
> eventually possible, with the right firmware support. But I don't know much
> about the Twiggy low-level details, nor do I have a Twiggy system to
> experiment with. I might look into it further in the future, but for now I
> think I did enough damage to my brain just trying to get the 400/800k stuff
> working. :-)
>
> -------- Original message --------
> From: chandra bajpai <cba..._at_email.domain.hidden <javascript:>>
> Date:03/04/2015 6:44 PM (GMT-08:00)
> To: lisa..._at_email.domain.hidden <javascript:>
> Cc:
> Subject: Re: Floppy disk emulator for Lisa
>
> Steve, does this emulate twiggy drives at all? (or can it be done easily?)
>
> Thanks,
> Chandra
>
>
> On Wed, Mar 4, 2015 at 9:29 PM, Steve Chamberlin <steve.ch..._at_email.domain.hidden
> <javascript:>> wrote:
>
>> OK, Lisa floppy drive emulation is a success! Begone, evil rotational
>> disk drives, with your failure-prone gummed-up mechanisms. The age of SD
>> card Lisa floppy emulation is here!
>>
>> After a lot of tinkering, it's now working on the 2/5 and 2/10, for both
>> Lisa-format and Mac-format disks. I'm able to boot the Lisa from the
>> emulated floppy drive, and use it to install Lisa Office System and other
>> apps to the HD, and copy apps and data files from the Lisa HD to the
>> emulated floppy drive. It also works for Mac-format disks, when running
>> under Macworks.
>>
>> Just download some Lisa floppy disk images from the interwebs, copy the
>> disk image files to a standard SD card, and put the card in the Floppy Emu.
>> From the Emu, you can select which disk image to "insert", and then the
>> Lisa sees it as a normal R/W floppy disk.
>>
>> The last hurdle was realizing that the custom adapter I'd built to
>> simultaneously connect a 400K floppy drive and a Floppy Emu was causing
>> problems. After getting rid of the adapter and connecting the Emu directly,
>> in place of the normal floppy drive, it's now working perfectly. There are
>> still a few small loose ends to tie up, but it's basically good to go.
>>
>> If anyone else is interested in buying one of the floppy emulators, I
>> have them for $89 at http://www.bigmessowires.com/macintosh-floppy-emu/
>>
>> Thanks,
>> Steve
>>
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