[Coco] eprom programmer

[Frank Pittel]

I've managed to accumulate a number of floppy controllers with at least a couple of 502s.
It's in fact one of my 502 controllers that I intend to put the 27128 with drivewire into.
Is there a better eprom to use?

The Other Frank

On Fri, Mar 23, 2012 at 04:54:35PM -0600, Darren A wrote:
> On Fri, Mar 23, 2012 at 4:38 PM, Frank Pittel  wrote:
> > I've got a tube of 13 27128s that I would like to be able to do something with. As
> > memory serves those eproms will work with the floppy controllers for the coco. My
> > thought is to replace the eprom in my "primary" controller with a drivewire image.
> 
> 
> Which floppy controller do you have?
> 
> A 27128 will work directly in an FD-502 controller so long as you
> program the HDB-DOS DW code into the upper half (or both halves) of
> the EPROM.
> 
> If you have an older controller with a 24 pin ROM socket, then you
> will need something like the DOS Adapter from Cloud9.  That will allow
> you to burn different DOSes into the two halves of the EPROM and use
> the jumper to select which one you want to use.
> 
> An inexpensive Willem programmer (see eBay) can be used to burn 27128 EPROMs.
> 
> Darren
> 
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