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Sledge
Registered: Sep 2003
Posts: 102 |
SID 6582A
Does anyone know how this chip sounds compared to the other models? It's a 9V version (like the 8580), and it was produced in 1992 mainly.
I have ordered a couple of them, since a guy on E-bay have 100 of them as new old stock. They cost a bit, but hey.. I want one anyways :-)
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Raf
Registered: Nov 2003
Posts: 343 |
if I remeber right 6582 is replacement for 6581 but it's more like 8580 soundwise anyway.
you won't fuck up 8580 by giving it 12v insted of 9v (I haven't even toasted 8580 with 21-22v and it was running few minutes under that conditions)
www.vulture.c64.org |
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Devia
Registered: Oct 2004
Posts: 401 |
Well.. 6582A is definately a 8580 replacement or vice versa ;)
I just did a quick non-scientific comparison and the 6582A sound is very similar, although not identical, to the 8580.. this was while listening to various 8580 and 6581 SIDs.
When plugged into a 12V machine it behaves and sounds exactly like the 8580 does when pluggen into an old 12V machine.. Almost like a 6581 but with the filter going fuckidysweeeeepkracklepopfuck. ...which reminds me.. does the 8580 mounted in a 12V machine retain the 6581 "like" waveforms when supplied with 9V instead of 12V? And does the filterfuck go away or do you have to do something to the caps too? ..I never tried mounting an 8580 in an old c64 while supplying it with the correct 9V so I have no clue how it behaves.. but it's interresting how the 8580 waveforms in a 12V machine sound a LOT like 6581 waveforms...
/me seriously needs to kick his own ass and do some proper testing... ;-) |
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Graham
Account closed
Registered: Dec 2002
Posts: 990 |
Oliver Achten said on IRC that his 6582 sounds exactly like a 8580 which basically hints to one thing: The 6582 is just a 8580 with a different printing on top. |
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Steppe
Registered: Jan 2002
Posts: 1510 |
Except that it can play $D418 digis like a 6581. That is a confirmed fact. |
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Devia
Registered: Oct 2004
Posts: 401 |
Quote: Except that it can play $D418 digis like a 6581. That is a confirmed fact.
I'm not at all convinced about that.. In my experience, the 8580's ability to play digis via $d418 seems to be related to the PCB design and not the actual chip. I only have _one_ C64 which doesn't play digis at a "proper" volume level and that is a C64G. All my other C64c machines have no problems. If you plug the 8580 in an old c64 it plays digis too.
Guess I should verify that my C64G's 8580 can play digis when plugged into another machine and that some other 8580 will NOT play digis when plugged into the C64G.
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Raf
Registered: Nov 2003
Posts: 343 |
Quote: Well.. 6582A is definately a 8580 replacement or vice versa ;)
I just did a quick non-scientific comparison and the 6582A sound is very similar, although not identical, to the 8580.. this was while listening to various 8580 and 6581 SIDs.
When plugged into a 12V machine it behaves and sounds exactly like the 8580 does when pluggen into an old 12V machine.. Almost like a 6581 but with the filter going fuckidysweeeeepkracklepopfuck. ...which reminds me.. does the 8580 mounted in a 12V machine retain the 6581 "like" waveforms when supplied with 9V instead of 12V? And does the filterfuck go away or do you have to do something to the caps too? ..I never tried mounting an 8580 in an old c64 while supplying it with the correct 9V so I have no clue how it behaves.. but it's interresting how the 8580 waveforms in a 12V machine sound a LOT like 6581 waveforms...
/me seriously needs to kick his own ass and do some proper testing... ;-)
Filters are primarily regulated with capacitance, not votage supply.
and digi abilities of some 8580 are not PCB dependant, I had few 8580 which can do $d418 digis loudly (like in my current 128Dcr resurrected thanx to Steppe)
I had a "loud" 8580 in my c64-II and after replacing it with another one when the original got toasted it lost ability of playing samples loud - I'm not talking shit - those things are FACTS.
Have in mind that CSG/MOS chips were produced at 3 different plants (plants were printed on the bottom of package) and hence this _may_ be plant-dependant for 8580 chip to be able to do digi or not.
www.vulture.c64.org |
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Devia
Registered: Oct 2004
Posts: 401 |
@raf: I never claimed you were talking shit ;-)
I just tested a bit and, yes.. the digi ability of the 8580 is definately a chip thing.
I tested 2 8580R5 in a C64c and a C64G. Chip #1 plays digis loud at 6581 volume levels while chip #2 plays digis at very low volume levels. Same results for both C64, so it's not a PCB thing ;-)
Chip #1 Top: 8580R5 - 4687 25
Chip #1 Bottom: Honk Kong - HH475209 - HC-30
Chip #2 Top: 8580R5 - 2887 25
Chip #2 Bottom: Hong Kong - HH272226 - HC-30
So, 2 chips from the same plant, same year but only 18 weeks apart behave totally different.
The 6582A plays digis at roughly the same volume level as Chip #2, so Steppe, I'm still not convinced ;-)
Another 8580R5 I had lying around played at a somewhat louder level as Chip #2, but still very low. ..i forgot to notice the details of that chip, tho.
It would be interresting to get some production dates/plants for other 8580 chips which plays digis at 6581 volume levels.
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Sledge
Registered: Sep 2003
Posts: 102 |
Which 6582A are you referring to? The ones I have here are from 1992, but they have been produced since 1986-87 something if you look at the SID symphony carts. So I guess a SID behaves the way it want to... :)
I will test the 6582A chips I have and report. I do not have that much time for the moment though..
-sledge |
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Steppe
Registered: Jan 2002
Posts: 1510 |
@devia: Oops, guess you learn something new about the Commie every day. Interresting, with two r even. ;-) |
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Oswald
Registered: Apr 2002
Posts: 5094 |
ah I see the future:
"for maximum experience play this tune with Hong Kong - HH272226 - HC-30, thank you"
;) |
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