Reply by Trampas ●September 10, 20042004-09-10

If people want a simple color NTSC video interface for a PIC then let me know. I made one for a project which had 320x240 pixels, 16 colors and support for 2 video buffers.

 

I estimate the board would sell for about $100 and would have a serial and parallel interface.

 

Regards,

Trampas

 

 

From: Charles Douvier [mailto:c...@intellstat.com]
Sent: Friday, September 10, 2004 4:53 PM
To: p...@yahoogroups.com
Subject: RE: [piclist] Re: composite video pattern generator

 

I am building my system on a 18F252. I find that between timing cycles (bit banging, which was probably not as much of an overhead problem on something specifically designed for the job) I find I have a lot of extra machine cycles as long as the image doesn’t change to much (like pong). However you run out of machine cycles quickly just changing the D/A  for the most basic video info, and if it’s suppose to move that’s much worse. I don’t think the PIC could pull off bit banging color, not even if I was running at 40Mhz. If it is possible I think you won’t get much done other than generating color bars. I don’t think you could pull off a game or whatnot without some external chip/circuitry.

 

I’ll post my code and schematic when I am done and you can take a peek. I am going to probably run at 10Mhz, and just got done w/ the code block diagram. It’s pretty simple to do after enough reading.

 

Charles

 

From: Nigel Symes [mailto:s...@hotmail.com]
Sent: Friday, September 10, 2004 6:06 AM
To: p...@yahoogroups.com
Subject: Re: [piclist] Re: composite video pattern generator

 

On the PIC-Pong and Tetris site the author says colour on TV with PICs isn't possible due to the slow speed of the PIC. I remember the Atari 2600 - It ran a 1.19MHz Video chip (TIA) and it generated many colours on the screen?

 

Shouldn't a PIC running at 4Mhz-8Mhz-16Mhz -faster be able to do the same. I mean the Atari 2600 only had 128 Bytes of RAM and the CPU was half-utilised the entire time at 1.19Mhz?

 

 

----- Original Message -----

From: rtstofer

To: p...@yahoogroups.com

Sent: Wednesday, September 08, 2004 6:25 AM

Subject: [piclist] Re: composite video pattern generator

 

Here is a pong game for NTSC - it does all the timing to generate
horizontal and vertical synch as well as B/W video.  I haven't been
able to implement it because I am having a problem with my PIC
programmer.  Should work...

http://dt.prohosting.com/pic/pong.html

--- In p...@yahoogroups.com, "Bert Drake" <Bert@D...> wrote:
> I may be wrong but I thought PAL was 50Hz and NTSC was 60Hz.
>   ----- Original Message -----
>   From: Leon Heller
>   To: p...@yahoogroups.com
>   Sent: Tuesday, September 07, 2004 2:33 PM
>   Subject: Re: [piclist] composite video pattern generator
>
>
>   ----- Original Message -----
>   From: "Chas Douvier" <chas@i...>
>   To: <p...@yahoogroups.com>
>   Sent: Tuesday, September 07, 2004 8:19 PM
>   Subject: [piclist] composite video pattern generator
>
>
>   > I have been looking for a NTSC Composite Video Pattern
Generator. A
>   > simple B&W is pattern is all I need. I just need to verify
that my
>   > video input is working. I wanted to make a small pic based one
and I
>   > have known about
>   > http://www.rickard.gunee.com/projects/video/pic/howto.php for
a
>   > while. Unfortunately he did it in PAL and didn't include the
bulk of
>   > the source code on how he made his pattern. I don't know
enough
>   > about TV systems to figure how to convert the signal from PAL
to
>   > NTSC anyways.
>   >
>   > Anyone seen this done?
>
>   Aren't PAL and NSTC monochrome (B&W) the same?
>
>   Leon
>   --
>   Leon Heller, G1HSM
>   http://webspace.webring.com/people/jl/leon_heller/
>
>
>   to unsubscribe, go to http://www.yahoogroups.com and follow the
instructions
>
>
>        
>             
>       
>       
>
>
> -------------------------------
-----------
>   Yahoo! Groups Links
>
>     a.. To visit your group on the web, go to:
>     http://groups.yahoo.com/group/piclist/
>      
>     b.. To unsubscribe from this group, send an email to:
>     p...@yahoogroups.com
>      
>     c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms
of Service.



to unsubscribe, go to http://www.yahoogroups.com and follow the instructions

to unsubscribe, go to http://www.yahoogroups.com and follow the instructions



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Reply by Charles Douvier ●September 10, 20042004-09-10

I am building my system on a 18F252. I find that between timing cycles (bit banging, which was probably not as much of an overhead problem on something specifically designed for the job) I find I have a lot of extra machine cycles as long as the image doesn’t change to much (like pong). However you run out of machine cycles quickly just changing the D/A  for the most basic video info, and if it’s suppose to move that’s much worse. I don’t think the PIC could pull off bit banging color, not even if I was running at 40Mhz. If it is possible I think you won’t get much done other than generating color bars. I don’t think you could pull off a game or whatnot without some external chip/circuitry.

 

I’ll post my code and schematic when I am done and you can take a peek. I am going to probably run at 10Mhz, and just got done w/ the code block diagram. It’s pretty simple to do after enough reading.

 

Charles

 

From: Nigel Symes [mailto:s...@hotmail.com]
Sent: Friday, September 10, 2004 6:06 AM
To: p...@yahoogroups.com
Subject: Re: [piclist] Re: composite video pattern generator

 

On the PIC-Pong and Tetris site the author says colour on TV with PICs isn't possible due to the slow speed of the PIC. I remember the Atari 2600 - It ran a 1.19MHz Video chip (TIA) and it generated many colours on the screen?

 

Shouldn't a PIC running at 4Mhz-8Mhz-16Mhz -faster be able to do the same. I mean the Atari 2600 only had 128 Bytes of RAM and the CPU was half-utilised the entire time at 1.19Mhz?

 

 

----- Original Message -----

From: rtstofer

To: p...@yahoogroups.com

Sent: Wednesday, September 08, 2004 6:25 AM

Subject: [piclist] Re: composite video pattern generator

 

Here is a pong game for NTSC - it does all the timing to generate
horizontal and vertical synch as well as B/W video.  I haven't been
able to implement it because I am having a problem with my PIC
programmer.  Should work...

http://dt.prohosting.com/pic/pong.html

--- In p...@yahoogroups.com, "Bert Drake" <Bert@D...> wrote:
> I may be wrong but I thought PAL was 50Hz and NTSC was 60Hz.
>   ----- Original Message -----
>   From: Leon Heller
>   To: p...@yahoogroups.com
>   Sent: Tuesday, September 07, 2004 2:33 PM
>   Subject: Re: [piclist] composite video pattern generator
>
>
>   ----- Original Message -----
>   From: "Chas Douvier" <chas@i...>
>   To: <p...@yahoogroups.com>
>   Sent: Tuesday, September 07, 2004 8:19 PM
>   Subject: [piclist] composite video pattern generator
>
>
>   > I have been looking for a NTSC Composite Video Pattern
Generator. A
>   > simple B&W is pattern is all I need. I just need to verify
that my
>   > video input is working. I wanted to make a small pic based one
and I
>   > have known about
>   > http://www.rickard.gunee.com/projects/video/pic/howto.php for
a
>   > while. Unfortunately he did it in PAL and didn't include the
bulk of
>   > the source code on how he made his pattern. I don't know
enough
>   > about TV systems to figure how to convert the signal from PAL
to
>   > NTSC anyways.
>   >
>   > Anyone seen this done?
>
>   Aren't PAL and NSTC monochrome (B&W) the same?
>
>   Leon
>   --
>   Leon Heller, G1HSM
>   http://webspace.webring.com/people/jl/leon_heller/
>
>
>   to unsubscribe, go to http://www.yahoogroups.com and follow the
instructions
>
>
>        
>             
>       
>       
>
>
> -------------------------------
-----------
>   Yahoo! Groups Links
>
>     a.. To visit your group on the web, go to:
>     http://groups.yahoo.com/group/piclist/
>      
>     b.. To unsubscribe from this group, send an email to:
>     p...@yahoogroups.com
>      
>     c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms
of Service.



to unsubscribe, go to http://www.yahoogroups.com and follow the instructions

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Reply by rtstofer ●September 10, 20042004-09-10

There are video encoder chips that will take RGB inputs are give
NTSC or PAL (selectable) outputs. Analog Devices makes an entire
series of devices such as the ADV7303A. Finding them in stock may
be a problem...

--- In , Chad Russel <chadrussel@y...> wrote:
> Depends on how you generate the color subcarrier. Probably a
separate
> circuit on the Atari. In NTSC the color subcarrier is a phase
> modulated 3.58 Mhz signal. To directly generate it with DAC
obviously
> you need to be much higher in clock freq.
>
> Chad
>
> --- Nigel Symes <symesbris@h...> wrote:
>
> > On the PIC-Pong and Tetris site the author says colour on TV with
> > PICs isn't possible due to the slow speed of the PIC. I remember
the
> > Atari 2600 - It ran a 1.19MHz Video chip (TIA) and it generated
many
> > colours on the screen?
> >
> > Shouldn't a PIC running at 4Mhz-8Mhz-16Mhz -faster be able to do
the
> > same. I mean the Atari 2600 only had 128 Bytes of RAM and the
CPU was
> > half-utilised the entire time at 1.19Mhz?
> >
> >
> > ----- Original Message -----
> > From: rtstofer
> > To:
> > Sent: Wednesday, September 08, 2004 6:25 AM
> > Subject: [piclist] Re: composite video pattern generator
> >
> >
> > Here is a pong game for NTSC - it does all the timing to
generate
> > horizontal and vertical synch as well as B/W video. I haven't
been
> >
> > able to implement it because I am having a problem with my PIC
> > programmer. Should work...
> >
> > http://dt.prohosting.com/pic/pong.html
> >
> > --- In , "Bert Drake" <Bert@D...> wrote:
> > > I may be wrong but I thought PAL was 50Hz and NTSC was 60Hz.
> > > ----- Original Message -----
> > > From: Leon Heller
> > > To:
> > > Sent: Tuesday, September 07, 2004 2:33 PM
> > > Subject: Re: [piclist] composite video pattern generator
> > >
> > >
> > > ----- Original Message -----
> > > From: "Chas Douvier" <chas@i...>
> > > To: <>
> > > Sent: Tuesday, September 07, 2004 8:19 PM
> > > Subject: [piclist] composite video pattern generator
> > >
> > >
> > > > I have been looking for a NTSC Composite Video Pattern
> > Generator. A
> > > > simple B&W is pattern is all I need. I just need to
verify
> > that my
> > > > video input is working. I wanted to make a small pic
based
> > one
> > and I
> > > > have known about
> > > >
http://www.rickard.gunee.com/projects/video/pic/howto.php for
> >
> > a
> > > > while. Unfortunately he did it in PAL and didn't include
the
> > bulk of
> > > > the source code on how he made his pattern. I don't know
> > enough
> > > > about TV systems to figure how to convert the signal
from PAL
> >
> > to
> > > > NTSC anyways.
> > > >
> > > > Anyone seen this done?
> > >
> > > Aren't PAL and NSTC monochrome (B&W) the same?
> > >
> > > Leon
> > > --
> > > Leon Heller, G1HSM
> > > http://webspace.webring.com/people/jl/leon_heller/
> > >
> > >
> > > to unsubscribe, go to http://www.yahoogroups.com and
follow the
> >
> > instructions
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > -----------------------------
--
> > -----------
> > > Yahoo! Groups Links
> > >
> > > a.. To
> >
> >
> >
> > to unsubscribe, go to http://www.yahoogroups.com and follow the
> > instructions
> >
> >
> >
> >
> >
> >
> >
> >
> >
> -------------------------------
-----------
> > Yahoo! Groups Links
> >
> > a.. To
> >
> >
> =====
> My software has no bugs, only undocumented features. >
> _______________________________
>



Reply by Chad Russel ●September 10, 20042004-09-10
Depends on how you generate the color subcarrier. Probably a separate
circuit on the Atari. In NTSC the color subcarrier is a phase
modulated 3.58 Mhz signal. To directly generate it with DAC obviously
you need to be much higher in clock freq.

Chad

--- Nigel Symes <> wrote:

> On the PIC-Pong and Tetris site the author says colour on TV with
> PICs isn't possible due to the slow speed of the PIC. I remember the
> Atari 2600 - It ran a 1.19MHz Video chip (TIA) and it generated many
> colours on the screen?
>
> Shouldn't a PIC running at 4Mhz-8Mhz-16Mhz -faster be able to do the
> same. I mean the Atari 2600 only had 128 Bytes of RAM and the CPU was
> half-utilised the entire time at 1.19Mhz? > ----- Original Message -----
> From: rtstofer
> To:
> Sent: Wednesday, September 08, 2004 6:25 AM
> Subject: [piclist] Re: composite video pattern generator > Here is a pong game for NTSC - it does all the timing to generate
> horizontal and vertical synch as well as B/W video. I haven't been
>
> able to implement it because I am having a problem with my PIC
> programmer. Should work...
>
> http://dt.prohosting.com/pic/pong.html
>
> --- In , "Bert Drake" <Bert@D...> wrote:
> > I may be wrong but I thought PAL was 50Hz and NTSC was 60Hz.
> > ----- Original Message -----
> > From: Leon Heller
> > To:
> > Sent: Tuesday, September 07, 2004 2:33 PM
> > Subject: Re: [piclist] composite video pattern generator
> >
> >
> > ----- Original Message -----
> > From: "Chas Douvier" <chas@i...>
> > To: <>
> > Sent: Tuesday, September 07, 2004 8:19 PM
> > Subject: [piclist] composite video pattern generator
> >
> >
> > > I have been looking for a NTSC Composite Video Pattern
> Generator. A
> > > simple B&W is pattern is all I need. I just need to verify
> that my
> > > video input is working. I wanted to make a small pic based
> one
> and I
> > > have known about
> > > http://www.rickard.gunee.com/projects/video/pic/howto.php for
>
> a
> > > while. Unfortunately he did it in PAL and didn't include the
> bulk of
> > > the source code on how he made his pattern. I don't know
> enough
> > > about TV systems to figure how to convert the signal from PAL
>
> to
> > > NTSC anyways.
> > >
> > > Anyone seen this done?
> >
> > Aren't PAL and NSTC monochrome (B&W) the same?
> >
> > Leon
> > --
> > Leon Heller, G1HSM
> > http://webspace.webring.com/people/jl/leon_heller/
> >
> >
> > to unsubscribe, go to http://www.yahoogroups.com and follow the
>
> instructions
> >
> >
> >
> >
> >
> >
> >
> >
> >
> -------------------------------
> -----------
> > Yahoo! Groups Links
> >
> > a.. To >
> to unsubscribe, go to http://www.yahoogroups.com and follow the
> instructions >
------
> Yahoo! Groups Links
>
> a.. To =====
My software has no bugs, only undocumented features.
_______________________________
Reply by Nigel Symes ●September 10, 20042004-09-10
On the PIC-Pong and Tetris site the author says colour on TV with PICs isn't possible due to the slow speed of the PIC. I remember the Atari 2600 - It ran a 1.19MHz Video chip (TIA) and it generated many colours on the screen?
 
Shouldn't a PIC running at 4Mhz-8Mhz-16Mhz -faster be able to do the same. I mean the Atari 2600 only had 128 Bytes of RAM and the CPU was half-utilised the entire time at 1.19Mhz?
 
 
----- Original Message -----
From: rtstofer
To: p...@yahoogroups.com
Sent: Wednesday, September 08, 2004 6:25 AM
Subject: [piclist] Re: composite video pattern generator

Here is a pong game for NTSC - it does all the timing to generate
horizontal and vertical synch as well as B/W video.  I haven't been
able to implement it because I am having a problem with my PIC
programmer.  Should work...

http://dt.prohosting.com/pic/pong.html

--- In p...@yahoogroups.com, "Bert Drake" <Bert@D...> wrote:
> I may be wrong but I thought PAL was 50Hz and NTSC was 60Hz.
>   ----- Original Message -----
>   From: Leon Heller
>   To: p...@yahoogroups.com
>   Sent: Tuesday, September 07, 2004 2:33 PM
>   Subject: Re: [piclist] composite video pattern generator>   ----- Original Message -----
>   From: "Chas Douvier" <chas@i...>
>   To: <p...@yahoogroups.com>
>   Sent: Tuesday, September 07, 2004 8:19 PM
>   Subject: [piclist] composite video pattern generator>   > I have been looking for a NTSC Composite Video Pattern
Generator. A
>   > simple B&W is pattern is all I need. I just need to verify
that my
>   > video input is working. I wanted to make a small pic based one
and I
>   > have known about
>   > http://www.rickard.gunee.com/projects/video/pic/howto.php for
a
>   > while. Unfortunately he did it in PAL and didn't include the
bulk of
>   > the source code on how he made his pattern. I don't know
enough
>   > about TV systems to figure how to convert the signal from PAL
to
>   > NTSC anyways.
>   >
>   > Anyone seen this done?
>
>   Aren't PAL and NSTC monochrome (B&W) the same?
>
>   Leon
>   --
>   Leon Heller, G1HSM
>   http://webspace.webring.com/people/jl/leon_heller/>   to unsubscribe, go to http://www.yahoogroups.com and follow the
instructions>        
>             
>       
>       > -------------------------------
-----------
>   Yahoo! Groups Links
>
>     a.. To



to unsubscribe, go to http://www.yahoogroups.com and follow the instructions


Reply by Chas Douvier ●September 8, 20042004-09-08
Wow, what a nightmare, I've only ever wirewrapped one project, that
was my ELF II and that was well after it was out of production. I
got it in a kit form from a guy I worked with at an electronics
store when I was 19.

I am a big fan of my PICDEM 2. I think it was only $199 from
Digikey, it's nice and small, the PCB is sort of big, but it works
well for programming, an if you feel like using their setup you can
do some testing on the board as well. I generally use all the same
ports and I soldered in .1 IN molex connectors to jumper to
breadboard, works out very nice, I don't know how anyone gets by
without ICSP unless they are building something small. I have only
used the 16F877A, 18F252 and 18F452. I favour the two 18F's and
don't really like using the 16F's anymore just because of the
extended instructions and I got used to them. Don't really care
about cost, I don't do this for a living.

Charles

--- In , "rtstofer" <rstofer@p...> wrote:
>
> Actually, I only have one programmer - the Warp 13A. I just
> upgraded the unit to 20 MHz and new firmware and now it is
useless.
> Furthermore, Newfound Electronics has posted a 'we aren't
providing
> customer support' notice on their web site. I ordered a
replacement
> 16F876 from a guy with an Amazon store - perhaps that will solve
the
> problem. So, I take back any prior recommendations for the Warp
> 13A - when the manufacturer decides to discontinue customer
support
> it is time to change to something else. Too bad, it worked really
> well for both plug-in and ICSP. Well, until the upgrade went
> sideways!
>
> I also ordered a new programmer from melabs - their serial unit.
> We'll see how that goes. Should be here in a couple of days.
>
> For the most part I use a bootloader in the 16F877 that comes from
> www.junun.org and is used in the MiniSumo Mark III. I just find
it
> easier to work with the bootloader and I often want serial I/O on
> the prototype board anyway. Plus I like developing on the larger
> device.
>
> I was looking at that pong game and have bought the parts - that's
> why I need a programmer. I built a copy of the real Pong back
> in '74 or '75 and it took 96 integrated circuits. Can you imagine
> the amount of wire-wrap? It worked very well because it WAS the
> real deal - copied direct from the original schematics.
>
> --- In , "Chas Douvier" <chas@i...> wrote:
> > Thanks, looks like it used parellex assembler for some pseudo-
ops
> or
> > whatever he called them, so I'll just port around that, plus
I'll
> > have to port for a uController that I like working with/can
> program.
> > 18F252 should work.
> >
> > I am suprised, I would think of anyone on this list you would
have
> > number of programmers. I imagine you and Chad Russell with about
> 30
> > odd different homebrew and professional programmers, and Wouter
w/
> > double that.
> >
> > Chas
> >
> > --- In , "rtstofer" <rstofer@p...> wrote:
> > > Here is a pong game for NTSC - it does all the timing to
> generate
> > > horizontal and vertical synch as well as B/W video. I haven't
> > been
> > > able to implement it because I am having a problem with my PIC
> > > programmer. Should work...
> > >
> > > http://dt.prohosting.com/pic/pong.html
> > >
> > > --- In , "Bert Drake" <Bert@D...> wrote:
> > > > I may be wrong but I thought PAL was 50Hz and NTSC was 60Hz.
> > > > ----- Original Message -----
> > > > From: Leon Heller
> > > > To:
> > > > Sent: Tuesday, September 07, 2004 2:33 PM
> > > > Subject: Re: [piclist] composite video pattern generator
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "Chas Douvier" <chas@i...>
> > > > To: <>
> > > > Sent: Tuesday, September 07, 2004 8:19 PM
> > > > Subject: [piclist] composite video pattern generator
> > > >
> > > >
> > > > > I have been looking for a NTSC Composite Video Pattern
> > > Generator. A
> > > > > simple B&W is pattern is all I need. I just need to
verify
> > > that my
> > > > > video input is working. I wanted to make a small pic
based
> > one
> > > and I
> > > > > have known about
> > > > >
http://www.rickard.gunee.com/projects/video/pic/howto.php
> > for
> > > a
> > > > > while. Unfortunately he did it in PAL and didn't include
> the
> > > bulk of
> > > > > the source code on how he made his pattern. I don't know
> > > enough
> > > > > about TV systems to figure how to convert the signal
from
> > PAL
> > > to
> > > > > NTSC anyways.
> > > > >
> > > > > Anyone seen this done?
> > > >
> > > > Aren't PAL and NSTC monochrome (B&W) the same?
> > > >
> > > > Leon
> > > > --
> > > > Leon Heller, G1HSM
> > > > http://webspace.webring.com/people/jl/leon_heller/
> > > >
> > > >
> > > > to unsubscribe, go to http://www.yahoogroups.com and
follow
> > the
> > > instructions
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > -------------------------
--
> --
> > --
> > > -----------
> > > > Yahoo! Groups Links
> > > >
> > > > a.. To




Reply by Chad Russel ●September 8, 20042004-09-08
Thought I heard my name. Imagination can get you in trouble,
especially with blind dates, wives and husbands.

I'm not into birthen' no programmers. My aim is to get progam into
chip, that is all. I have PicStart, Quickwriter, and distributors.

Regards,
Chad :D

--- Chas Douvier <> wrote:
<<< snip >>>
>
> I am suprised, I would think of anyone on this list you would have
> number of programmers. I imagine you and Chad Russell with about 30
> odd different homebrew and professional programmers, and Wouter w/
> double that.
>
> Chas
<<< snip >>>

=====
My software has no bugs, only undocumented features.

__________________________________



Reply by rtstofer ●September 8, 20042004-09-08

Actually, I only have one programmer - the Warp 13A. I just
upgraded the unit to 20 MHz and new firmware and now it is useless.
Furthermore, Newfound Electronics has posted a 'we aren't providing
customer support' notice on their web site. I ordered a replacement
16F876 from a guy with an Amazon store - perhaps that will solve the
problem. So, I take back any prior recommendations for the Warp
13A - when the manufacturer decides to discontinue customer support
it is time to change to something else. Too bad, it worked really
well for both plug-in and ICSP. Well, until the upgrade went
sideways!

I also ordered a new programmer from melabs - their serial unit.
We'll see how that goes. Should be here in a couple of days.

For the most part I use a bootloader in the 16F877 that comes from
www.junun.org and is used in the MiniSumo Mark III. I just find it
easier to work with the bootloader and I often want serial I/O on
the prototype board anyway. Plus I like developing on the larger
device.

I was looking at that pong game and have bought the parts - that's
why I need a programmer. I built a copy of the real Pong back
in '74 or '75 and it took 96 integrated circuits. Can you imagine
the amount of wire-wrap? It worked very well because it WAS the
real deal - copied direct from the original schematics.

--- In , "Chas Douvier" <chas@i...> wrote:
> Thanks, looks like it used parellex assembler for some pseudo-ops
or
> whatever he called them, so I'll just port around that, plus I'll
> have to port for a uController that I like working with/can
program.
> 18F252 should work.
>
> I am suprised, I would think of anyone on this list you would have
> number of programmers. I imagine you and Chad Russell with about
30
> odd different homebrew and professional programmers, and Wouter w/
> double that.
>
> Chas
>
> --- In , "rtstofer" <rstofer@p...> wrote:
> > Here is a pong game for NTSC - it does all the timing to
generate
> > horizontal and vertical synch as well as B/W video. I haven't
> been
> > able to implement it because I am having a problem with my PIC
> > programmer. Should work...
> >
> > http://dt.prohosting.com/pic/pong.html
> >
> > --- In , "Bert Drake" <Bert@D...> wrote:
> > > I may be wrong but I thought PAL was 50Hz and NTSC was 60Hz.
> > > ----- Original Message -----
> > > From: Leon Heller
> > > To:
> > > Sent: Tuesday, September 07, 2004 2:33 PM
> > > Subject: Re: [piclist] composite video pattern generator
> > >
> > >
> > > ----- Original Message -----
> > > From: "Chas Douvier" <chas@i...>
> > > To: <>
> > > Sent: Tuesday, September 07, 2004 8:19 PM
> > > Subject: [piclist] composite video pattern generator
> > >
> > >
> > > > I have been looking for a NTSC Composite Video Pattern
> > Generator. A
> > > > simple B&W is pattern is all I need. I just need to verify
> > that my
> > > > video input is working. I wanted to make a small pic based
> one
> > and I
> > > > have known about
> > > > http://www.rickard.gunee.com/projects/video/pic/howto.php
> for
> > a
> > > > while. Unfortunately he did it in PAL and didn't include
the
> > bulk of
> > > > the source code on how he made his pattern. I don't know
> > enough
> > > > about TV systems to figure how to convert the signal from
> PAL
> > to
> > > > NTSC anyways.
> > > >
> > > > Anyone seen this done?
> > >
> > > Aren't PAL and NSTC monochrome (B&W) the same?
> > >
> > > Leon
> > > --
> > > Leon Heller, G1HSM
> > > http://webspace.webring.com/people/jl/leon_heller/
> > >
> > >
> > > to unsubscribe, go to http://www.yahoogroups.com and follow
> the
> > instructions
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > ---------------------------
--
> --
> > -----------
> > > Yahoo! Groups Links
> > >
> > > a.. To





Reply by Chas Douvier ●September 8, 20042004-09-08
Thanks, looks like it used parellex assembler for some pseudo-ops or
whatever he called them, so I'll just port around that, plus I'll
have to port for a uController that I like working with/can program.
18F252 should work.

I am suprised, I would think of anyone on this list you would have
number of programmers. I imagine you and Chad Russell with about 30
odd different homebrew and professional programmers, and Wouter w/
double that.

Chas

--- In , "rtstofer" <rstofer@p...> wrote:
> Here is a pong game for NTSC - it does all the timing to generate
> horizontal and vertical synch as well as B/W video. I haven't
been
> able to implement it because I am having a problem with my PIC
> programmer. Should work...
>
> http://dt.prohosting.com/pic/pong.html
>
> --- In , "Bert Drake" <Bert@D...> wrote:
> > I may be wrong but I thought PAL was 50Hz and NTSC was 60Hz.
> > ----- Original Message -----
> > From: Leon Heller
> > To:
> > Sent: Tuesday, September 07, 2004 2:33 PM
> > Subject: Re: [piclist] composite video pattern generator
> >
> >
> > ----- Original Message -----
> > From: "Chas Douvier" <chas@i...>
> > To: <>
> > Sent: Tuesday, September 07, 2004 8:19 PM
> > Subject: [piclist] composite video pattern generator
> >
> >
> > > I have been looking for a NTSC Composite Video Pattern
> Generator. A
> > > simple B&W is pattern is all I need. I just need to verify
> that my
> > > video input is working. I wanted to make a small pic based
one
> and I
> > > have known about
> > > http://www.rickard.gunee.com/projects/video/pic/howto.php
for
> a
> > > while. Unfortunately he did it in PAL and didn't include the
> bulk of
> > > the source code on how he made his pattern. I don't know
> enough
> > > about TV systems to figure how to convert the signal from
PAL
> to
> > > NTSC anyways.
> > >
> > > Anyone seen this done?
> >
> > Aren't PAL and NSTC monochrome (B&W) the same?
> >
> > Leon
> > --
> > Leon Heller, G1HSM
> > http://webspace.webring.com/people/jl/leon_heller/
> >
> >
> > to unsubscribe, go to http://www.yahoogroups.com and follow
the
> instructions
> >
> >
> >
> >
> >
> >
> >
> >
> > -----------------------------
--
> -----------
> > Yahoo! Groups Links
> >
> > a.. To





Reply by Chas Douvier ●September 8, 20042004-09-08
Mike,

Thanks for the input, of course that comes to mind in every hobbist
project. I doubt there are to many projects you do that you save
money on, definately if you count the cost of your time. This is for
work, but my own personal work. I need something portable and
battery powered. I could buy some bar generator online for 399$,
money really isn't the issue. I just like to build my own stuff. It
gives me a sense of self worth that I didn't buy that oscope on ebay
for $250 and dump endless days of fixing a "working" scope, etc.
Beats banging my head on my work bench deciding what I want to build
next.

Charles --- In , "mikerey35475" <mwrey@b...> wrote:
> --- In , "Chas Douvier" <chas@i...> wrote:
> > I have been looking for a NTSC Composite Video Pattern
Generator. A
> > simple B&W is pattern is all I need. I just need to verify that
my
> > video input is working. I wanted to make a small pic based one
and
> I
> > have known about
> > http://www.rickard.gunee.com/projects/video/pic/howto.php for a
> > while. Unfortunately he did it in PAL and didn't include the
bulk
> of
> > the source code on how he made his pattern. I don't know enough
> > about TV systems to figure how to convert the signal from PAL to
> > NTSC anyways.
> >
> > Anyone seen this done?
>
> Chas,
>
> Unless you just want the experience from building a PIC circuit to
do
> this, why not just use the video output jack of a VCR. Positively
a
> standard NTSC signal, will have the chroma info, but will be
ignored
> by a monchrome system.
>
> Mike