[Coco] ROMMAX EPROM PROGRAMMER

[coco at yourdvd.net]

POKE &HFFDE,.  PUTS COCO IN ROM MODE (THE . CAN BE ANY NUMBER OR A
PERIOD WHICH HAS A VALUE OF 0 IN COCO BASIC)

SAVEM "DECB",&HC000,&HDFFF,&HC000 FOR AN 8K DISK BASIC SUCH AS DECB

-Robert

> -------- Original Message --------
> Subject: Re: [Coco] ROMMAX EPROM PROGRAMMER
> From: John T Chasteen <johnchasteen.2 at juno.com>
> Date: Thu, May 03, 2007 5:00 pm
> To: coco at maltedmedia.com
> 
> 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
> > > 
> > > --
> > > Coco mailing list
> > > Coco at maltedmedia.com
> > > http://five.pairlist.net/mailman/listinfo/coco
> > 
> > 
> > --
> > Coco mailing list
> > Coco at maltedmedia.com
> > http://five.pairlist.net/mailman/listinfo/coco
> > 
> > 
>  
> 
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco