TS2068 video quality
8 messages · 2005-07-06 → 2005-07-07 · Yahoo Group era · View archive on archive.org
Participants: Ralph E. Dodd, Glen Goodwin, Jeff Burrell, William McBrine, Louis Florit
Preserved from the Timex/Sinclair 2068 Yahoo Group (2001–2019), which is no longer online. Text reproduced from the archive.org archive; email addresses masked.
Messages
1. TS2068 video quality
Ralph E. Dodd · Wed, 6 Jul 2005 15:46:
Hell,
I'm a new member to the group and I have a few questions. I have 2 ts2068s with the same crumby video from both the tv & composite outputs. The screen has wavy lines on it. Are all of these like this or is this a problem that has a fix available? Also I'd like to burn a 48K speccy rom (I have a burner & the rom image) and use a circuit to switch between the original & speccy roms. Is there such a circuit available or at least something similar? TIA.
Ralph
2. Re: [ts2068] TS2068 video quality
Jeff Burrell · Wed, 6 Jul 2005 18:02:
Ralph;
My 2068 composite output looked fine the last time I used it a couple of years ago. Could the problem be bad filter capacitors on the power supply. The 2068 used electolytics and they do dry out over time. If that happens, there will be ripple on the supply voltages that may not seriously affect the digital circuits but can cause problems with the video.
I don't know if you can just drop a 48K ROM into either of the on-board sockets. The home ROM is limited to 16K by the SCLD and the extension ROM isn't pinned out for a larger ROM. The Spectrum emulators plugged into the dock connector and could use the full 64K of the dock address range.
---------------------------------
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3. Re: [ts2068] TS2068 video quality
William McBrine · Thu, 7 Jul 2005 00:58:
On 7/6/05, Ralph E. Dodd <[email]> wrote:
> I have 2 ts2068s with the same crumby video from both the tv &
> composite outputs. The screen has wavy lines on it. Are all of
> these like this or is this a problem that has a fix available?
In my experience, yes, they're all like that (and they were from the beginning).
There was an article in Time Designs about how to make an RGB
interface for the 2068, and supposedly clean up the video at the same
time. But that's another of those things I'm not going to risk trying
(soldering on the motherboard and all that).
IMHO the best way to get clean video is to use an emulator. Sorry.
4. Re: [ts2068] TS2068 video quality
Glen Goodwin · Thu, 07 Jul 2005 09:29
Good morning --
If you need schematice for a circuit which will feed
video to an RGB (CGA) monitor let me know.
Glen
0/0
Ralph E. Dodd wrote:
> Hell,
>
> I'm a new member to the group and I have a few questions. I have 2 ts2068s with the same crumby video from both the tv & composite outputs. The screen has wavy lines on it. Are all of these like this or is this a problem that has a fix available? Also I'd like to burn a 48K speccy rom (I have a burner & the rom image) and use a circuit to switch between the original & speccy roms. Is there such a circuit available or at least something similar? TIA.
>
> Ralph
5. Re: [ts2068] TS2068 video quality
Ralph E. Dodd · Thu, 7 Jul 2005 09:55:
----- Original Message -----
From: Glen Goodwin
To: [email]
Sent: Thursday, July 07, 2005 9:29 AM
Subject: Re: [ts2068] TS2068 video quality
Good morning --
If you need schematice for a circuit which will feed
video to an RGB (CGA) monitor let me know.
Glen
0/0
Ralph E. Dodd wrote:
> Hell,
>
> I'm a new member to the group and I have a few questions. I have 2 ts2068s with the same crumby video from both the tv & composite outputs. The screen has wavy lines on it. Are all of these like this or is this a problem that has a fix available? Also I'd like to burn a 48K speccy rom (I have a burner & the rom image) and use a circuit to switch between the original & speccy roms. Is there such a circuit available or at least something similar? TIA.
>
> Ralph
Glen,
I would love to see the circuit. I like hardware projects. Maybe you should post it to the files sections so everyone can see it. I posted a pdf file of the TS2068 Technical Reference Manual yesterday. Thanks.
Ralph
6. Re: [ts2068] TS2068 video quality
Glen Goodwin · Thu, 07 Jul 2005 12:34
Hi Ralph --
I'm sending you the PDF directly to your email address.
If you like, please post it to the files section --
I'm supposed to be working at the moment ;-)
Thanks --
Glen
0/0
Ralph E. Dodd wrote:
> ----- Original Message -----
> From: Glen Goodwin
> To: [email]
> Sent: Thursday, July 07, 2005 9:29 AM
> Subject: Re: [ts2068] TS2068 video quality
>
>
> Good morning --
>
> If you need schematice for a circuit which will feed
> video to an RGB (CGA) monitor let me know.
>
> Glen
> 0/0
>
> Ralph E. Dodd wrote:
>
>>Hell,
>>
>>I'm a new member to the group and I have a few questions. I have 2 ts2068s with the same crumby video from both the tv & composite outputs. The screen has wavy lines on it. Are all of these like this or is this a problem that has a fix available? Also I'd like to burn a 48K speccy rom (I have a burner & the rom image) and use a circuit to switch between the original & speccy roms. Is there such a circuit available or at least something similar? TIA.
>>
>>Ralph
>
>
> Glen,
>
> I would love to see the circuit. I like hardware projects. Maybe you should post it to the files sections so everyone can see it. I posted a pdf file of the TS2068 Technical Reference Manual yesterday. Thanks.
>
> Ralph
7. Re: [ts2068] TS2068 video quality
Louis Florit · Thu, 7 Jul 2005 15:37:
I'd be interested in the PDF as well, if possible- I'd like to put it
into the 'unsorted' section of the timexsinclair.org website.
L
On 7/7/05, Glen Goodwin <[email]> wrote:
> Hi Ralph --
>
> I'm sending you the PDF directly to your email address.
>
> If you like, please post it to the files section --
> I'm supposed to be working at the moment ;-)
>
> Thanks --
>
> Glen
> 0/0
>
> Ralph E. Dodd wrote:
> > ----- Original Message -----
> > From: Glen Goodwin
> > To: [email]
> > Sent: Thursday, July 07, 2005 9:29 AM
> > Subject: Re: [ts2068] TS2068 video quality
> >
> >
> > Good morning --
> >
> > If you need schematice for a circuit which will feed
> > video to an RGB (CGA) monitor let me know.
> >
> > Glen
> > 0/0
> >
> > Ralph E. Dodd wrote:
> >
> >>Hell,
> >>
> >>I'm a new member to the group and I have a few questions. I have 2 ts2068s with the same crumby video from both the tv & composite outputs. The screen has wavy lines on it. Are all of these like this or is this a problem that has a fix available? Also I'd like to burn a 48K speccy rom (I have a burner & the rom image) and use a circuit to switch between the original & speccy roms. Is there such a circuit available or at least something similar? TIA.
> >>
> >>Ralph
> >
> >
> > Glen,
> >
> > I would love to see the circuit. I like hardware projects. Maybe you should post it to the files sections so everyone can see it. I posted a pdf file of the TS2068 Technical Reference Manual yesterday. Thanks.
> >
> > Ralph
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
--
Louis Florit
AIM: lflorit MSN:[email] Y!: indygolunaria
8. Re: [ts2068] TS2068 video quality
Ralph E. Dodd · Thu, 7 Jul 2005 17:02:
I've posted the "rgb adapters.PDF" file to the files section of [email].
Ralph
----- Original Message -----
From: Louis Florit
To: [email]
Sent: Thursday, July 07, 2005 3:37 PM
Subject: Re: [ts2068] TS2068 video quality
I'd be interested in the PDF as well, if possible- I'd like to put it
into the 'unsorted' section of the timexsinclair.org website.
L
On 7/7/05, Glen Goodwin <[email]> wrote:
> Hi Ralph --
>
> I'm sending you the PDF directly to your email address.
>
> If you like, please post it to the files section --
> I'm supposed to be working at the moment ;-)
>
> Thanks --
>
> Glen
> 0/0
>
> Ralph E. Dodd wrote:
> > ----- Original Message -----
> > From: Glen Goodwin
> > To: [email]
> > Sent: Thursday, July 07, 2005 9:29 AM
> > Subject: Re: [ts2068] TS2068 video quality
> >
> >
> > Good morning --
> >
> > If you need schematice for a circuit which will feed
> > video to an RGB (CGA) monitor let me know.
> >
> > Glen
> > 0/0
> >
> > Ralph E. Dodd wrote:
> >
> >>Hell,
> >>
> >>I'm a new member to the group and I have a few questions. I have 2 ts2068s with the same crumby video from both the tv & composite outputs. The screen has wavy lines on it. Are all of these like this or is this a problem that has a fix available? Also I'd like to burn a 48K speccy rom (I have a burner & the rom image) and use a circuit to switch between the original & speccy roms. Is there such a circuit available or at least something similar? TIA.
> >>
> >>Ralph
> >
> >
> > Glen,
> >
> > I would love to see the circuit. I like hardware projects. Maybe you should post it to the files sections so everyone can see it. I posted a pdf file of the TS2068 Technical Reference Manual yesterday. Thanks.
> >
> > Ralph
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
--
Louis Florit
AIM: lflorit MSN:[email] Y!: indygolunaria
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