12 Facts About SID chip

Together with the VIC-II graphics chip, the SID was instrumental in making the C64 the best-selling home computer in history, and is partly credited for initiating the demoscene.

SID chip was devised by engineer Robert "Bob" Yannes, who later co-founded the Ensoniq digital synthesizer and sampler company.

Emphasis during chip design was on high-precision frequency control, and the SID was originally designed to have 32 independent voices, sharing a common wavetable lookup scheme that would be time multiplexed.

However, these features could not be finished in time, so instead the mask work for a certain working oscillator was simply replicated three times across the SID chip's surface, creating three voices each with its own oscillator.

Since 6581 and 8580 SID chip ICs are no longer produced, they have become highly sought after.

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The remarked chips are assumed to either be factory rejects from back when the chip was still produced, or possibly "reject pulls" from one of the chip pulling operations that were used to supply the chips used in the HardSID cards.

SID chip is a mixed-signal integrated circuit, featuring both digital and analog circuitry.

Consumer version of the 8580 was rebadged the 6582, even though the die on the SID chip is identical to a stock 8580 SID chip, including the '8580R5' mark.

The majority of games produced for the Commodore 64 made use of the SID chip, with sounds ranging from simple clicks and beeps to complex musical extravaganzas or even entire digital audio tracks.

The USHSC is based on both the SOASC= and HVSC, but uploads recordings of recent SID chip music released at the Commodore Scene Database site.

SID chip file contains the 6510 program code and associated data needed to replay the music on the SID chip.

The newer standard, RSID chip, is intended for music that requires a more complete emulation of the Commodore 64 hardware.