Alternative Hardware Design for Floppy Interface

Dave McGuire mcguire at
Mon Oct 29 10:45:44 CDT 2007

On Oct 19, 2007, at 9:21 PM, Dan Roganti wrote:
>>> The base eZ80SBC from howard is $250.  Add $100 for the disk  
>>> board...
>> Hmmm, I suppose if a SASI interface and ST412 interface could be  
>> added to talk to those kind of devices too, $250 wouldn't be too  
>> bad for the 'core' portion. $350 for just a floppy interface is  
>> perhaps a little on the high side, though.
>> (Someone here was working on a generic ST412 interface -  
>> presumably over-sampling tack data and processing in software -  
>> weren't they? Can't remember who it was now...)
> There's already an inexpensive eZ80F91 development board from Zilog  
> for the budget conscious -only $99. And it's complete with cables,  
> jtag debugger, IDE, and C compiler. It has an ethernet port among  
> other interfaces. It doesn't have USB, but easily done with a RS232- 
> USB converter. The expansion interface provides all the GPIO's to  
> let you connect a floppy interface.And it's available from Mouser  
> or Digikey.

   I have that's what I used to evaluate the eZ80F91 for a  
few projects a couple of years ago.  It's a good development system  
overall, but their C compiler is Windows-only, so I was stuck with  
running it under an emulator.  I hope they fix that soon.


Dave McGuire
Port Charlotte, FL
Farewell Ophelia, 9/22/1991 - 7/25/2007

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