Talk:MOS Technology SID
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[edit] Proposed article move
This article should be moved to MOS Technology 6581 for greater orthogonality with other MOS Technology integrated circuit articles, such as MOS Technology 6522 and MOS Technology 6532. Note that these are named by their numeric designations and not their titles (VIA and RIOT, respectively). This should be made consistent. Crotalus horridus 19:32, 11 December 2005 (UTC)
- OK with me, but IF AND ONLY IF you change ALL the links on ALL pages that in turn link here. Thats a lot of work see. Nixdorf 19:47, 11 December 2005 (UTC)
- I prefer it the way it is now. Mirror Vax 23:15, 11 December 2005 (UTC)
[edit] Fixed in...?
Does anybody really know at which actual hardware revision the pop-on-volume-change "bug" was fixed? I'm not sure, but I think the story is that while C64 C model has 8580s, it's not at all related to the sample volume issues, because every C64 C I've used seem to play samples just fine and this issue cropped up after the C generation. I have both a C64C and a C64G, and the C can play digital samples just fine, while the G has pretty quiet samples - so it was "fixed" in either the G (which seems to be my recollection) or some slightly earlier C64 hardware iteration. --wwwwolf (barks/growls) 15:45, 14 January 2006 (UTC)
[edit] Phrasing In Revisions Section
"This probably means that the R1 was the first round of chips and R2 actually the second mask produced." What exactly does the author mean 'and R2 actually the second mask produced."? I was going to reword it, but I don't understand what he/she was trying to communicate with this sentence. JousterL 00:54, 08 November 2006 (UTC)
[edit] Invalid Rationale?
The following statement:
"A HMOS-II version of the 6581 was produced, the 6582. Like the 8580, this chip used 5 volts and 9 volts for its power supplies. It was never shipped in new Commodore 64s, however due to its lower voltage requirement,"
Appears to be an invalid rationale for the 6582 not being shipped in new Commodore 64s, since 8580's were shipped in C models, and these are 9V HMOS-II devices. I think this statement should be removed because it's speculative.
[edit] Ring Modulation
It seems to me (tho it is equivalent) that the SID did ring modulation by multiplying the values of the oscilators instead of convolving their spectra as this is far far chaper to implement. In simple terms, in a ring modulator the output of one oscilator acts as a volume control for another oscilator. There is realy no need to work in the frequency domain and it seems highly unlikely that the SID (or anything in those times bar supercomputers) was capable of spectral analysis.
