[Coco] So is this a G board?

Fri Jun 28 09:55:02 EDT 2013

I noticed my "fix" over the mc1372:

https://twitter.com/RetroCanada76/status/350464954366836736

is different from this:

http://www.doki-doki.net/~lamune/computers/coco/26-3003b/P2223732.html

Are they equivalent ?

On Fri, Jun 28, 2013 at 9:44 AM, Mark Marlette <mmarlette at frontiernet.net>wrote:

> Luis,
>
> Cleaning of the CoCo1 cart fingers is done by inserting the carts only, DO
> NOT try to do it any other way.
>
> Not an issue ATM.
>
> Suggestion....
>
> Replace uP, if you have a Pro-Tector+ use that as well.
>
> Something sounds very borderline/defective in this machine.
>
>
> Regards,
>
> Mark
>
>
> ________________________________
>  From: Luis Antoniosi (CoCoDemus) <retrocanada76 at gmail.com>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Sent: Friday, June 28, 2013 8:38 AM
> Subject: Re: [Coco] So is this a G board?
>
>
> I don't have a scope but I friend of mine does. So if I need I can use it.
>
> The behaviour of the sIDE is erratic, sometimes is hangs right after
> displaying HDBDOS 1.1D... with some garbage, other times it will pass the
> boot (showing the HDBDOS 1.1 LBDA MODE) and a Ok but accessing the CF will
> give me I/O error. Sometimes i will get the boot and a ?FN ERROR (trying to
> load AUTOEXEC.BAS ?).
>
> If I boot without a CF card instead of showing LBA HARD DRIVE NOT FOUND it
> will display garbage after the HDBDOS 1.1 logo.
>
> I compiled a HDBLBA13.ROM (from toolshed) and flashed on sIDE and it works
> on coco3 but again no sucess on coco1. Same erratic behaviour.
>
> Then I flashed ADOS2 and HDBDOSCC1.ROM on bank (0 and 1). ADOS works fine
> except that: POKE &H77F5,51 will hang. So to access the floppy I need to
> switch the multipak button. DW3 boots fine from bank 1 but when acessing
> the DW3 server i get i/o error.
>
> I played several carts on it and all seemed to work. The fdcs FD500 and
> FD502 work fine too.
>
> Today I found a game that works on coco2/3 to not work on cococ1: The Keys
> of the Wizard.
>
> I have cleand the sIDE contacts, I will try to clean the coco1 contacts but
> they seemed pretty clean to me.
>
>
>
>
>
>
> On Fri, Jun 28, 2013 at 9:14 AM, Mark Marlette <mmarlette at frontiernet.net
> >wrote:
>
> > Luis,
> >
> > This is strange for sure. Boisy might want to add something here..... ??
> >
> > It
> >  sounds like to me the sIDE is not getting addressed or selected. That
> > is strange since it is IOmapped. Proper address appears on address bus
> and
> > the
> > device is selected. The default proper address in the default condition
> is
> > $FF50-$FF59.
> >
> > If you have a scope, let me know then we can go to the next level.
> Address
> > appears on ADR bus and a signal is then presented from the CPLD called
> > SEL_OUT~. This signal is then presented back in to the CPLD to be gated
> > with some more logic inside the CPLD to produce SLENB~, a critical signal
> > in the sIDE. I will send you the schematic of the sIDE in PM.
> >
> > As you have mentioned other devices work in
> > the slot...just try pulling the sIDE in and out of the slot six times or
> >  so to clean the card edge of the CoCo. With power off of course. sIDE is
> > fully decoded so you are just making sure the connector is clean. Also
> > check the sIDE's gold contacts clean with soft white eraser to remove
> > tarnish. Lightly a few times top/bottom should do it. But since the sIDE
> > works in other CoCos, not likely the issue.
> >
> > What
> >  does this program produce on the screen? It should read the switch
> > settings for banks 0-3. The 1st switch will cause the program to crash,
> > that is normal.  So if SW 1 is up and 2&3 are down, program should
> > display a 0. If 2&3 are down and up respectively, should read 1.
> > You get the idea....
> >
> > If these numbers are not produced the the
> > most basic card select is not occurring and of course the CF card will
> > not be detected.
> >
> > 10 POKE &HFF40,0
> > 20 POKE &HFF7F,0
> > 30 PRINTHEX$(PEEK(&HFF59)):GOTO 30
> >
> > Also looking back at some information when we designed this might help
> you
> > on the boot process.......Jeeeez a 2004 dated email from Boisy when were
> > developing this device.....
> >
> >
> > >Here's
> > what HDB-DOS does at startup to the IDE:
> > >
> > >(1)
> > Checks for the existence of a master drive on the IDE bus.  It does
> > >this
> > by writing $55 to the IDE Sector Register and reading the register
> > >back.  If what it read back is $55, then HDB-DOS
> > assumes that a drive is
> > >present.    This is because if a drive is not present,
> > we are writing to a
> > >"dead
> > register" that won't hold the contents of what we wrote.  When we
> > >read
> > back what we wrote, we assume the drive is powered up and ready to roll.
> > >
> > >(2)
> > Assuming the drive checks out fine, it sends a $70 command to the
> > >drive
> > and sits in a loop until the seek returns no error.
> > >
> > >(3)
> > Once the loop in #2 is exited, the $EC (Read Capacity) command is sent
> > >to
> > the controller and the size information is gathered about the drive.
> > >
> > >(4)
> > AUTOEXEC.BAS is then read, etc...
> > >
> > >So
> > to summarize, #1 verifies a drive is on the interface, #2 just does a
> > >seek
> > (probably useless) and #3 queries the drive to determine how many >Disk
> > BASIC
> > "drives" it can hold.
> >
> > Regards,
> >
> > Mark
> > http://www.cloud9tech.com
> >
> >
> >
> > ________________________________
> >  From: Retro Canada <retrocanada76 at gmail.com>
> > To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> > Cc: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> > Sent: Friday, June 28, 2013 6:09 AM
> > Subject: Re: [Coco] So is this a G board?
> >
> >
> > but why the superide hangs here?
> >
> > Sent from my iPhone
> >
> > On 2013-06-28, at 1:05 AM, Arthur Flexser <flexser at fiu.edu> wrote:
> >
> > > If you're asking about that wire running to one of the PIAs, I'm pretty
> > > sure that's part of RS's official 64K upgrade used by the repair
> centers.
> > > Notice that it has two warranty stickers on the bottom, presumably the
> > > second one applied after someone brought it into RS to have it
> > "officially"
> > > upgraded to 64K.
> > >
> > > I suppose RS wanted to make it possible to check for 64K by looking at
> > the
> > > status of one of the PIA lines, but since I don't think other people
> with
> > > 64K upgrades followed that convention, this unreliable method of
> checking
> > > for 64K was pretty much ignored in favor of more straightforward
> software
> > > methods.
> > >
> > > Art
> > >
> > >
> > > On Fri, Jun 28, 2013 at 12:49 AM, Retro Canada <
> retrocanada76 at gmail.com
> > >wrote:
> > >
> > >> another thing this board has 2 mc1372. why? there is only one video
> > output!
> > >>
> > >> Sent from my iPhone
> > >>
> > >> On 2013-06-28, at 12:14 AM, Retro Canada <retrocanada76 at gmail.com>
> > wrote:
> > >>
> > >>> Hi i got this beautiful great white coco
> > >>>
> > >>> http://twitter.com/RetroCanada76/status/350422134088167424/photo/1
> > >>>
> > >>> its was sealed, never opened. once opened i found this
> > >>>
> > >>> http://twitter.com/RetroCanada76/status/350465048709320704/photo/1
> > >>>
> > >>> which is exactly this guy here posted
> > >>>
> > >>>
> > http://www.doki-doki.net/~lamune/computers/coco/26-3003b/P2223732-r.html
> > >>>
> > >>> This machine doesn't run DWCC1 gives i/o error and my superide hangs
> > >> when looking for the Cf. everything else seems to work except the
> > artifact
> > >> colors:
> > >>>
> > >>> http://twitter.com/RetroCanada76/status/350464227212922880/photo/1
> > >>>
> > >>> http://twitter.com/RetroCanada76/status/350464318850088962/photo/1
> > >>>
> > >>> green and pink?
> > >>>
> > >>> tried to regulate the trimmers but no success...
> > >>>
> > >>>
> > >>> Sent from my iPhone
> > >>
> > >> --
> > >> Coco mailing list
> > >> Coco at maltedmedia.com
> > >> http://five.pairlist.net/mailman/listinfo/coco
> > >
> > > --
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> > > Coco at maltedmedia.com
> > > http://five.pairlist.net/mailman/listinfo/coco
> >
> > --
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> >
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> >
>
>
>
> --
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>
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