[Coco] CoCo-XT RTC ROM and disk

Sat Sep 1 17:21:16 EDT 2018

Use the program HDD Hex Editor Neo for Windows
I will email it to you right now

Basically use it to open your old rom

Now open the new rom(.bin) and compare the beginning. Just delete until you get to the same start as the known working one. That will remove the header. Now scroll to to the bottom of the new rom and compare it to the bottom of the known working one. Delete any values after the end of the original

Sent from my BlackBerry
  Original Message
From: Jim McClanahan
Sent: Saturday, September 1, 2018 5:06 PM
To: CoCoList for Color Computer Enthusiasts
Reply To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] CoCo-XT RTC ROM and disk

You'll know the length of the header. (It won't be long--I'm not familiar
with CoCo binaries, but maybe a load and an entry address at most.) Then
you have to figure out how to remove them. I have read how to do it before
but don't remember the details.

Good news is it is probably just sorting through a few steps and reburning
the eprom.

Jim

On Sat, Sep 1, 2018, 4:54 PM John Mautz <ejmautz2 at gmail.com> wrote:

> Ok, I'll have to spend some time looking.  When I find it, then what?
>
> On Sat, Sep 1, 2018 at 3:16 PM Jim McClanahan <jim30109 at gmail.com> wrote:
>
> > The first two locations are an ASCII flag. On the working one you have
> > "DK", but the nonworking one doesn't make sense.
> >
> > I think think the point about having a header you need to pull out is
> spot
> > on. Peek a few more locations higher and you will likely find the "DK"
> > again.
> >
> > Thanks,
> > Jim
> >
> > On Sat, Sep 1, 2018, 11:47 AM John Mautz <ejmautz2 at gmail.com> wrote:
> >
> > > Dave,
> > > I have a Multi-Pack....  CoCo-XT is in slot 3.
> > >
> > > working v2.3
> > >     PEEK(&HC000) = 68
> > >     PEEK(&HC001) = 75
> > >
> > > Not working v3.0 - fresh burn
> > >     PEEK(&HC000) = 171
> > >     PEEK(&HC001) = 186
> > >
> > > Thanks,
> > > John.
> > >
> > >
> > > On Sat, Sep 1, 2018 at 11:32 AM Dave Philipsen <dave at davebiz.com>
> wrote:
> > >
> > > > Yeah, with the controller plugged in with the new ROM, what do you
> get
> > > > when you PEEK(&HC000) and PEEK(&HC001)?
> > > >
> > > > Dave
> > > >
> > > > > On Sep 1, 2018, at 10:29 AM, Jim McClanahan <jim30109 at gmail.com>
> > > wrote:
> > > > >
> > > > > Can you PEEK () the ROM from BASIC? That would tell you if the ROM
> > was
> > > on
> > > > > the bus and what the contents are.
> > > > >
> > > > > Not exactly sure what you are doing, so that may not be helpful.
> But
> > my
> > > > > experience with EPROMs is that if they erase and I can successfully
> > > > verify
> > > > > the write, they work. In my homebrew systems it is usually a wiring
> > or
> > > > > timing problem when they don't.
> > > > >
> > > > > good luck,
> > > > > Jim
> > > > >
> > > > >> On Sat, Sep 1, 2018, 11:21 AM John Mautz <ejmautz2 at gmail.com>
> > wrote:
> > > > >>
> > > > >> Ok, received my tube of 2764A chips.  I've tried twice (each with
> a
> > > new
> > > > >> chip) and when I put it in my CoCo-XT card it does not recognize
> the
> > > > >> CoCo-XT.  It just boots to the normal CoCo3 screen.  When I put
> the
> > > old
> > > > >> v2.3 ROM back it it boots fine so I didn't blow that part up.
> Both
> > > > chips
> > > > >> passed verification, so that should be fine.
> > > > >>
> > > > >> I'm using a USBPrg GQ-4X programmer (mine is the 4x not the 4x4
> > which
> > > is
> > > > >> the current version -
> > > > >>
> > > >
> > >
> >
> http://www.mcumall.com/comersus/store/comersus_viewItem.asp?idProduct=4282
> > > > >> ,
> > > > >> only for reference to help me out not an advertisement, as
> naturally
> > > I'm
> > > > >> having trouble).  When I open the XT-ROM30.Bin, I have a choice of
> > > Read
> > > > >> mode, Fill Mode and File offset. I just chose defaults, Read Mode
> =
> > > > Normal,
> > > > >> Fill Mode = Normal, File Offset = 000000.
> > > > >>
> > > > >> Before I start the trial and error process of burn, test, UV
> erase,
> > > does
> > > > >> anyone have any guidance?
> > > > >>
> > > > >> Thanks,
> > > > >> John.
> > > > >>
> > > > >>> On Mon, Aug 27, 2018 at 10:35 PM John Mautz <ejmautz2 at gmail.com>
> > > > wrote:
> > > > >>>
> > > > >>> Thank you all.  I'm just waiting on my EPROMS to arrive and I can
> > > start
> > > > >>> playing.  You help is much appreciated.
> > > > >>>
> > > > >>> On Mon, Aug 27, 2018 at 4:23 PM rietveld rietveld <
> > > > rietveldh at hotmail.com
> > > > >>>
> > > > >>> wrote:
> > > > >>>
> > > > >>>> I actually have 3.1 or 3.01.    I can upload that if it's not in
> > the
> > > > >>>> archive. As far as I know that was the final release.
> > Unfortunately
> > > I
> > > > >> don't
> > > > >>>> think I have the manual for it but I definitely have the ROM
> > > > >>>>
> > > > >>>> Sent from my BlackBerry 10 smartphone.
> > > > >>>>  Original Message
> > > > >>>> From: tonym
> > > > >>>> Sent: Monday, August 27, 2018 4:14 PM
> > > > >>>> To: coco at maltedmedia.com
> > > > >>>> Reply To: CoCoList for Color Computer Enthusiasts
> > > > >>>> Subject: Re: [Coco] CoCo-XT RTC ROM and disk
> > > > >>>>
> > > > >>>>
> > > > >>>> Pretty sure I uploaded the 3.0 ROM, and manual, a few years
> back.
> > > > might
> > > > >>>> be on "THE ftp" though...
> > > > >>>>
> > > > >>>> Tony
> > > > >>>>
> > > > >>>>
> > > > >>>> ---- Original Message ----
> > > > >>>> From: "Grumpyx" <grumpyx at gmail.com>
> > > > >>>> Sent: 8/26/2018 9:39:03 PM
> > > > >>>> To: "CoCoList for Color Computer Enthusiasts" <
> > coco at maltedmedia.com
> > > >
> > > > >>>> Subject: Re: [Coco] CoCo-XT RTC ROM and disk
> > > > >>>>
> > > > >>>> The color computer archive has them:
> > > > >>>>
> > > > >>>>
> http://www.colorcomputerarchive.com/search?q=burke&ww=0&cat=&cs=0
> > > > >>>>
> > > > >>>> The XT-ROM zip file has several version including 3.0
> > > > >>>>
> > > > >>>>
> > > > >>>>
> > > > >>>>> On Sat, Aug 25, 2018 at 6:55 PM John Mautz <ejmautz2 at gmail.com
> >
> > > > wrote:
> > > > >>>>>
> > > > >>>>> Hello,
> > > > >>>>>
> > > > >>>>> I picked up a CoCo-XT RTC a few months ago.  It works great as
> it
> > > > came
> > > > >>>> with
> > > > >>>>> what I was told is a 5MB HD.  My CoCo-XT has the Western
> Digital
> > > > >>>> 1002A-WX1
> > > > >>>>> card int it.  When it boots it show the Burke & Burke ROM
> version
> > > to
> > > > >> be
> > > > >>>>> 2.3.  I don't see a version on the CoCo-XT RTC card (other than
> > the
> > > > >>>>> copyright 1988, though it could be on the back of the card).
> > > I've
> > > > >>>> doing
> > > > >>>>> some searches for about a week now and I must be searching the
> > > wrong
> > > > >>>> way as
> > > > >>>>> I'm not finding any hits.
> > > > >>>>>
> > > > >>>>> This brings me to my 2 questions:
> > > > >>>>> 1) Does anyone have a newer version of the ROM?  If so can you
> > > > >> provide a
> > > > >>>>> link or send it to me?  I have searched around and all I can
> find
> > > is
> > > > >> the
> > > > >>>>> manual for version 2.4 and a 2.5 supplement. - BTW: I'm willing
> > to
> > > > >> read
> > > > >>>> and
> > > > >>>>> upload my version 2.3 ROM if someone wants it.
> > > > >>>>>
> > > > >>>>> 2) Has anyone see the disk imaged some place?  I've looked and
> I
> > > seen
> > > > >>>> where
> > > > >>>>> it used to be sold for $24.99 but no links to the actual
> > software.
> > > > >>>>>
> > > > >>>>> So other than completeness, why do I ask?  I was able to get a
> > > Tandy
> > > > >>>> 20MB
> > > > >>>>> external hard drive.  The PS was dead so I replaced that and
> > would
> > > > >> like
> > > > >>>> to
> > > > >>>>> use the Seagate ST-225 that came with it.  Therefore I need the
> > > disk
> > > > >>>> with
> > > > >>>>> the utilities on it.
> > > > >>>>>
> > > > >>>>> Thanks,
> > > > >>>>> John.
> > > > >>>>>
> > > > >>>>> --
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