On Wed, Jan 30, 2002 at 07:07:36AM -0500, Evans Michael E Maj ACC/XPPI wrote:
> I recall, perhaps 10 years ago, an article (Popular Electronic ?) which
> outlined a project to build a ROM virtual disk.  As I remember it had a mess
> of "small" EPROMs. Today I'm sure you could slim it down quick a bit with
> large EPROM and even Flash components.  I imagine the protocol which allowed
> it to function is still valid today, I don't believe the standard has
> changed much since 1986.  I may have a copy of the article if you're
> interested.

I believe that the correct answer has already been given. But I think is may
bear repeating. The most standard, likely least expensive, and most available
solution is a compact flash chip in a CF to IDE adapter.

Anything else is redesigning.

BAJ
>
> MEE
>
> -----Original Message-----
> From: Josh Koffman [mailto:listsjosh@3MTMP.COM]
> Sent: Tuesday, January 29, 2002 6:58 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC]:floppy emulation?
>
>
> I think you will find that emulating a floppy drive is going to be
> rather hard. I'd really look at your application though. I know you want
> this to be as bulletproof as possible, but remember, the floppy drive is
> only used to load the ramdisk. So, it should really only be accessed on
> a reboot. How often are you going to reboot your machine? You can get
> single board computers that have a solid state based boot memory, and I
> believe you can get emulation cards that plug into regular computers. I
> think you may have more luck working with some sort of existing
> solution. That said, if you do get it working, please let us know :)
>
> Josh
>
> --
> A common mistake that people make when trying to design something
> completely foolproof is to underestimate the ingenuity of complete
> fools.
>         -Douglas Adams
>
> "Ken , VK7KRJ" wrote:
> >
> > Hi, I checked the archives and the only mention I can find re. emulating a
> > floppy with a pic and some eeprom was back in 1998. Has anyone any updates
> > on this- I want to replace the floppy drive on my linux router project pc,
> > this runs in ramdisk and boots from a single 1.44 floppy so if I can
> replace
> > the (mechanical) floppy with a solid-state "virtual" floppy it leaves the
> > power supply fan as the only mechanical thing to wear out, which has to be
> > good news for something that will be running 24/7.
> >
> > Cheers, Ken, vk7krj@southcom.com.au
>
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