Picked up a Commodore 1701 today, Question about the Chroma/Luma input

Discussion in 'Repair, Restoration, Conservation and Preservation' started by Bomberhead, Mar 7, 2013.

  1. Bomberhead

    Bomberhead Gutsy Member

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    [​IMG]

    The front has Composite that looks beautiful, however there is slight shadows if you're really looking for them. It came with the Commodore "DIN" connector that works great with the C64 system itself. However I cant help but think there has to exist an adapter that splits the Chroma and Luma out of S-Video. Like, Female S-Video to 2X Male RCA..
    http://radagast.ca/C64_svideo/C64_Svideo.html
    I found this page, looks like I would be able to make one. But I was hoping that there would be a pro build somewhere on evay for like $5 or something.. Any advice would help.
     
    Last edited: Mar 8, 2013
  2. Druidic teacher

    Druidic teacher Officer at Arms

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    x
     
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  3. smf

    smf mamedev

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    I'm not sure how close to svideo specification the chroma/luma inputs are on those monitors. But yeah it should be simple to either hack an svideo cable up, or buy the parts to make one.
     
  4. retro

    retro Resigned from mod duty 15 March 2018

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    You could easily make one. However, isn't the DIN an RGB socket? Why on Earth wouldn't you just use that? Sure, you'd have to pick up some RGB leads for anything you plug into it, but it's worth it! Make a DIN to SCART adapter, then get SCART leads. Easy!
     
  5. Lum

    Lum Officer at Arms

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    No. Commodore 64 didn't output RGB.

    This isn't an Amiga era monitor.
     
  6. MangledLeg

    MangledLeg Peppy Member

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    I grabbed a project box and plonked an S-Video socket on one side and 2x RCA for audio (L/R), and on the other side I added 3x RCA sockets (1 for mono audio and Y/C for S-video).

    Mind, I was going the other way around - using an original C64 YC cable on my TV. The chroma's a bit richer than standard s-video specs, but apparently a resistor on the C channel fixes that for C64 output if you want to desaturate the output when going to a TV.

    Not sure about going the other way - your chroma will probably look a little washed out since the monitor's setup for the extra-saturated chroma output from the C64.

    At least that was my experience when setting up my gear, as I had the same monitor.
     
  7. retro

    retro Resigned from mod duty 15 March 2018

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    That's Americans for you. We had several home micros of that era that had RGB out.

    Pretty pointless monitor, then! Why didn't people just use televisions? Or was America that archaic that they didn't have composite or s-video on their televisions in 1985? Admittedly, a lot of portable bedroom televisions were only RF over here around then, but larger televisions were at least starting to have better connectors.
     
  8. smf

    smf mamedev

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    They didn't have analogue output though, so their colour choices were arguably not as good as the c64.

    The tubes in monitors were better than those in TV's. I use a Philips monitor for my c128 and it's much better than a TV.
     
    Last edited: Mar 9, 2013
  9. wilykat

    wilykat Site Supporter 2013

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    Most budget TV didn't have anything beside antenna input until about mid 90's. So blame it on cheap Americans.
     
  10. retro

    retro Resigned from mod duty 15 March 2018

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    Lol yeah, 14 inch televisions were pretty much the same here.
     
  11. Bomberhead

    Bomberhead Gutsy Member

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    I have to say. The image is amazingly tight and clean on this. The colors really "pop" and there is absolutely zero latency. I love this thing.. Now just to make up some sort of adapter.
     
  12. Lum

    Lum Officer at Arms

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    We're talking 1982, not 1985. A big difference! I don't recall stuff like Apple II or ZX Spectrum following RGB standards either.
     
  13. retro

    retro Resigned from mod duty 15 March 2018

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    Actually, if you want to split hairs, the 1701 came out in 1983.

    You're wrong - the ZX Spectrum 128 used RGB, which came out in 1985, as did every Spectrum since (i.e. the Amstrad models). Apple II is American and we've already discussed how far behind you were in video standards ;) Not to mention that it was released in 1977, which, by your standards is surely an even bigger difference? ;) Poor example, though, as the Apple IIGS did indeed have RGB, in 1986 (the same year as the CoCo 3, also RGB) - later than the Sinclair. I believe there was a (pretty iffy) RGB card made by a third party for the IIe, too. The Amstrad CPC range, released in 1984, had RGB out as did the Acorn Electron, released in 1983. And, of course, the BBC Micro famously had RGB (as anyone who went to school in the UK in the Eighties will tell you, all schools had Microvitec Cub RGB monitors) starting with the Model B (I think from 1982), although the Model A (1981) could optionally have RGB added.

    Incidentally, the Zenith ZVM-134 monitor, released at the end of 1982, accepted RGB. Didn't the Ti-99/4 have RGB? And that was released in 1979! The slightly later Ti-99/4A almost certainly did, IIRC!
     
  14. Lum

    Lum Officer at Arms

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    I guess. It'd solve a lot problems around here if there was a notice on the top of the board just saying American TVs suck. :stupid:
     
  15. Bomberhead

    Bomberhead Gutsy Member

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    gVyXLwu.jpg
    XD I am 99% kidding
     
  16. lnx64

    lnx64 Robust Member

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    I have a Teknika C64/CGA monitor (C64 for the luma and chroma inputs, and CGA for the digital TTL RGB input).

    I made a simple S-Video adapter for it, and it works great, no problems at all.
     
  17. Bomberhead

    Bomberhead Gutsy Member

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    s vid commodore 1701.jpg

    made this today... works perfectly..
     
  18. ApolloBoy

    ApolloBoy Gutsy Member

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    Neither of them did, they only had composite.
     
  19. retro

    retro Resigned from mod duty 15 March 2018

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    Lol, I guess it's just a given! Never Twice Same Colour, and all that! ;)

    Ah, fair enough! Did it have some kind of DIN socket on it, though? That must be what I was thinking of. Been ages since I've seen one!
     
  20. Bad_Ad84

    Bad_Ad84 The Tick

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    In the US.

    Had RGB/Component elsewhere as it used a different video chip than the US model.
     
    Last edited: Mar 13, 2013
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