[Coco] XPander-Coco lives!

[Kip Koon]

Hi Jim,
I have a SuperIDE cartridge as well as a CoCoSDC and an FD500.  I'd be happy to test your Xpander.  Just let me know specifically what you wish me to do.  

Kip Koon
computerdoc at sc.rr.com
http://www.cocopedia.com/wiki/index.php/Kip_Koon



> -----Original Message-----
> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of RETRO Innovations
> Sent: Monday, August 31, 2015 9:29 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] XPander-Coco lives!
> 
> On 8/31/2015 7:58 PM, Mark Marlette wrote:
> > Jim
> >
> >
> > The only thing that I can think of is SLENB*. It is used to get the ghosting of certain floppy disk controllers off the bus. This is for
> ROM access only. The IDE hardware is IOmapped at $FF50-$FF59 by default.
> I don't manage SLENB, but I do turn on the data bus buffer (ls245) on when I see SLENB low,
> >
> > Jim O. contacted me today and indicated that his sIDE was defective.  If it was inserted with power applied it is more than likely bad.
> Yep, and if there is a cost to fixing it, charge me, as I am the cause, at least indirectly.
> > Maybe that is why it didn't work if you are handling SLENB* properly.
> Well, they said it was not working before the unit went bad.  It would work as the only cart in the MPI, but when they put a 500 or 501
> in the system, it gave errors.  I can trace SLENB.
> 
> Now, SLENB is not buffered by the device, so maybe the signal is getting slewed too badly.  I guess I should have scoped it last
> weekend.
> 
> Anyone have a SuperIDE and a FD500/501/502 they might let me borrow or rent? :-)  Or, maybe I can wire up the SLENB signal to a
> temp gate to buffer it, and send the unit to someone for testing who has a setup that includes the SuperIDE.
> >
> > To date that has been the only problem with returned sIDEs for repair.
> >
> > Regards
> >
> > Mark
> >
> > www.cloud9tech.com
> >
> >
> > Sent from Yahoo Mail on Android
> >
> > From:"RETRO Innovations" <go4retro at go4retro.com> Date:Mon, Aug 31,
> > 2015 at 7:03 PM Subject:[Coco] XPander-Coco lives!
> >
> > For those who care, I was able to have folks test my MPI replacement
> > at the recent VCF-MW show.  They ran it through paces, and things
> > worked well.  There were, however, two issues I need to disposition:
> >
> > 1) No power switch on the unit.  I didn't think of needing it, but one
> > should power off the unit when swapping carts.  I will add a suitable
> > switch.  No issues there.
> > 2) SuperIDE did not seem to like being in the MPI with other
> > FD500/FD501 carts.  My understanding is that they work in the original
> > MPI, so I need to figure out what makes SuperIDE special and address that issue.
> > I am hoping Mark will see this and can offer some suggestions.
> > CocoSDC and the FDXXX carts worked fine, so I think the concern with
> > with SuperIDE alone.
> >
> > I am sure folks got some pics at the show, so I'll let others send links.
> >
> > Jim
> >
> 
> 
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