[Coco] ROMMAX EPROM PROGRAMMER

[John T Chasteen]

What do I have to do to copy the ROM to disk from aq coco 3?

John 
On Thu, 03 May 2007 14:30:00 -0700 coco at yourdvd.net writes:
> I couldn't find a supported device in the rommax software that 
> matched
> the oddball pinout of the roms in the tandy disk controllers. So I 
> used
> a header, something like robert gault suggested earlier and adapted 
> it
> to a 2764 footprint and the rommax was able to read it as a 2764.
> Thanks - robert
> p.s. I didn't actually need to read these ROMS - I could simply 
> copy
> them to floppy from a coco - I was just playing with the rommax 
> because
> it was the first one I came across digging through storage.
> I have fun with this stuff - I guess that's what it's all about -r
> 
> 
> > -------- Original Message --------
> > Subject: Re: [Coco] ROMMAX EPROM PROGRAMMER
> > From: Joel Ewy <jcewy at swbell.net>
> > Date: Thu, May 03, 2007 7:28 am
> > To: CoCoList for Color Computer Enthusiasts 
> <coco at maltedmedia.com>
> > 
> > coco at yourdvd.net wrote:
> > > Anyone on the list have any experience with the eetools.com 
> rommax
> > eprom
> > > programmer? When I try to read a DECB 24 pin ROM as a 2764 it 
> fails,
> > but
> > > if I set it to 2732, it reads it, but isn't the 2732 4k and the 
> disk
> > > basic rom 8k? I took the eprom out of my coco 2 controller 
> (ADOS) (24
> > > pin eprom) and same thing. I am running it on a 500 Mhaz k6-2 in 
> DOS
> > > mode (windows 98 command prompt) using the pentium version of 
> the
> > > software. I have other programmers in storage, but to dig for 
> them....
> > > Any assistance appreciated. - Robert
> > >
> > >
> > > --
> > > Coco mailing list
> > > Coco at maltedmedia.com
> > > http://five.pairlist.net/mailman/listinfo/coco
> > >
> > >   
> > The ROM chips used on the CoCo disk controller are indeed 8K, but 
> in a
> > 24-pin package.  They use a different pin for the high address 
> bit, and
> > so aren't pin-compatible with the 2764.  Hence the adaptors people 
> have
> > to wire up in order to stick the much more common 28-pin EPROMs 
> into a
> > CoCo disk controller.  The Disto controllers (at least the SC-1 & 
> SC-2)
> > used 28-pin ROM sockets, and can accept the 2764.  The part number 
> you
> > want to look for for the 24-pin 8K ROMs escapes me now, but I'm 
> sure
> > there are others on this list who can quote it for you off the top 
> of
> > their heads...
> > 
> > JCE
> > 
> > --
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> > Coco at maltedmedia.com
> > http://five.pairlist.net/mailman/listinfo/coco
> 
> 
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> 
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