Async color encoding
Async color encoding
About 20 years ago dear friend Gyro saw me buy a 14.31818MHz crystal at Addison Electronics and asked me why I was doing that.
I noticed long ago the color encoding on the C64 was generated by the same clock source as the dot clock and this has a detrimental impact on the image quality.
When I bought a C64DTV in 2005, I noticed it had a great quality TV signal even if it only had a composite output. I noticed then the color encoding was asynchronous relative to the dot clock. The old idea resurfaced...
Now, discussing with a friend about the 8701 clock generator, it occurred to me I could make one that uses two independent oscillators to ensure async color encoding and so I did. I love the result!
The funny thing is I now know what to do to encode the colors for PAL compatibility on an NTSC system and inversely.
I noticed long ago the color encoding on the C64 was generated by the same clock source as the dot clock and this has a detrimental impact on the image quality.
When I bought a C64DTV in 2005, I noticed it had a great quality TV signal even if it only had a composite output. I noticed then the color encoding was asynchronous relative to the dot clock. The old idea resurfaced...
Now, discussing with a friend about the 8701 clock generator, it occurred to me I could make one that uses two independent oscillators to ensure async color encoding and so I did. I love the result!
The funny thing is I now know what to do to encode the colors for PAL compatibility on an NTSC system and inversely.
Socialism never took root in America because the poor see themselves not as an exploited proletariat but as temporarily embarrassed millionaires. -John Steinbeck
- Gyro Gearloose
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Re: Async color encoding
The preferred form of address is "Glorious Friend" (note proper use of capitals as a form of respect.)
The price one pays for pursuing any profession, or calling, is an intimate knowledge of its ugly side.
Re: Async color encoding
Oh my!Gyro Gearloose wrote:The preferred form of address is "Glorious Friend" (note proper use of capitals as a form of respect.)
I didn't know you had become the supreme tyrannical leader of a kingdom disguised as a communist country. which happens to have recently tested nuclear bombs and long range missiles...
You might ask that I call you Glorious Friend but is it more than likely a few prefer to call you iGnOminiOus Fiend ? (note intentional improper use of capitals as a form of disrespect...)
Last edited by eslapion on Fri Aug 05, 2016 5:19 am, edited 1 time in total.
Socialism never took root in America because the poor see themselves not as an exploited proletariat but as temporarily embarrassed millionaires. -John Steinbeck
- Gyro Gearloose
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Re: Async color encoding
The price one pays for pursuing any profession, or calling, is an intimate knowledge of its ugly side.
Re: Async color encoding
@Gyro
Now we know why the uncle of the man in the photo above was supposedly eaten alive by a large pack of hungry dogs and then later declared has having been shot to death...
Now we know why the uncle of the man in the photo above was supposedly eaten alive by a large pack of hungry dogs and then later declared has having been shot to death...
Socialism never took root in America because the poor see themselves not as an exploited proletariat but as temporarily embarrassed millionaires. -John Steinbeck
- Gyro Gearloose
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- Posts: 471
- Joined: Sun Nov 15, 2015 5:20 am
- Contact:
Re: Async color encoding
The price one pays for pursuing any profession, or calling, is an intimate knowledge of its ugly side.
Re: Async color encoding
@Gyro
Haa! Recover the lost proteins for the good hard working people - brilliant idea!
The guy with the blue-grey beret looks absolutely thrilled!
Haa! Recover the lost proteins for the good hard working people - brilliant idea!
The guy with the blue-grey beret looks absolutely thrilled!
Last edited by eslapion on Sat Aug 06, 2016 9:20 pm, edited 1 time in total.
Socialism never took root in America because the poor see themselves not as an exploited proletariat but as temporarily embarrassed millionaires. -John Steinbeck
Re: Async color encoding
That's not the only execution method.
One senior general was made to stand in front of an anti-aircraft gun, the barrels were lowered and fired horizontally...
One senior general was made to stand in front of an anti-aircraft gun, the barrels were lowered and fired horizontally...
Re: Async color encoding
How exactly did this thread turn from color encoding on the C64 to methods for killing corrupt military officers ?merman wrote:That's not the only execution method.
One senior general was made to stand in front of an anti-aircraft gun, the barrels were lowered and fired horizontally...
Anyways... one can always say it's about hardware...
If I may say so... Gyro's method recovers part of what's lost, merman's method is grossly wasteful.
Socialism never took root in America because the poor see themselves not as an exploited proletariat but as temporarily embarrassed millionaires. -John Steinbeck
Re: Async color encoding
Socialism never took root in America because the poor see themselves not as an exploited proletariat but as temporarily embarrassed millionaires. -John Steinbeck
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