Sunsoft 5B audio: Revision history

2 June 2021

• curprev 18:2118:21, 2 June 2021‎ Lidnariq talk contribs‎ m 10,017 bytes +76‎ →‎Audio Register Select ($C000-$DFFF): "select" is 8 bits wide, not just 4

31 March 2019

• curprev 01:4501:45, 31 March 2019‎ Rainwarrior talk contribs‎ 9,941 bytes +250‎ →‎Sound: Explain relationship between period/frequency and clocks
• curprev 00:0900:09, 31 March 2019‎ Rainwarrior talk contribs‎ 9,691 bytes −70‎ →‎Sound: the operation of the SEL pin isn't known to me, possibly I was wrong about what it does to the envelope. omitting it because it's irrelevant to the 5B

29 March 2019

• curprev 18:4818:48, 29 March 2019‎ Rainwarrior talk contribs‎ 9,761 bytes +256‎ →‎Sound: no halting
• curprev 17:0917:09, 29 March 2019‎ Rainwarrior talk contribs‎ 9,505 bytes +673‎ →‎Sound: volume 0 is silent, phase counter should have "count up, >= period" behaviour
• curprev 16:5916:59, 29 March 2019‎ Rainwarrior talk contribs‎ 8,832 bytes +766‎ →‎Envelope: explaining relationship of envelope to volume

28 March 2019

• curprev 21:3921:39, 28 March 2019‎ Rainwarrior talk contribs‎ 8,066 bytes +178‎ YM2149F really belongs in the lead
• curprev 21:3421:34, 28 March 2019‎ Rainwarrior talk contribs‎ 7,888 bytes −215‎ →‎Sound: trying to tone down the comparison against AY, removing unnecessary 2x breakout in formulae
• curprev 21:1321:13, 28 March 2019‎ Rainwarrior talk contribs‎ 8,103 bytes +187‎ →‎Output: mention the amplifier and link to relevant thread
• curprev 21:1121:11, 28 March 2019‎ Rainwarrior talk contribs‎ 7,916 bytes +97‎ →‎Shape: reference for envelope reset being a full phase reset
• curprev 21:0921:09, 28 March 2019‎ Rainwarrior talk contribs‎ 7,819 bytes +198‎ →‎Sound: more demonstration references
• curprev 21:0721:07, 28 March 2019‎ Rainwarrior talk contribs‎ m 7,621 bytes +15‎ →‎References: references tag
• curprev 21:0621:06, 28 March 2019‎ Rainwarrior talk contribs‎ 7,606 bytes +81‎ →‎Noise: reference to demonstrate LFSR was verified
• curprev 21:0121:01, 28 March 2019‎ Rainwarrior talk contribs‎ 7,525 bytes −7‎ →‎Noise: LSFR is verified
• curprev 07:0107:01, 28 March 2019‎ Rainwarrior talk contribs‎ 7,532 bytes −2‎ →‎Sound: 0=1 includes noise
• curprev 06:4006:40, 28 March 2019‎ Rainwarrior talk contribs‎ 7,534 bytes +32‎ →‎Sound
• curprev 06:1906:19, 28 March 2019‎ Rainwarrior talk contribs‎ m 7,502 bytes 0‎ →‎Period: use "continue" instead of "repeat" terminology, consistent with below and datasheet
• curprev 06:1806:18, 28 March 2019‎ Rainwarrior talk contribs‎ 7,502 bytes −262‎ →‎Period: trying to make this clearer: the envelope has one-shot and alternating modes, each of which has different pitch, more appropriate to give step frequency (and maybe not muddle things further by unnecessarily describing AY at the same time)

20 November 2018

• curprev 05:5205:52, 20 November 2018‎ Koitsu talk contribs‎ 7,764 bytes +23‎ No edit summary

12 September 2018

• curprev 23:2123:21, 12 September 2018‎ Tepples talk contribs‎ 7,741 bytes +139‎ →‎Sound: More explicitly contrast lack of +1 in these formulas with those of other pulse channels
• curprev 19:3319:33, 12 September 2018‎ Rainwarrior talk contribs‎ 7,602 bytes +80‎ →‎Sound: note why there isn't a division by zero in the frequency calculations

16 November 2014

• curprev 01:4901:49, 16 November 2014‎ Lidnariq talk contribs‎ m 7,522 bytes −4‎ Consistent number of digits of significance for frequencies

8 May 2013

• curprev 20:2020:20, 8 May 2013‎ Rainwarrior talk contribs‎ m 7,526 bytes +15‎ →‎Noise: likely implementation (this is what the cool kids are doing these days, at least)

6 May 2013

• curprev 18:5018:50, 6 May 2013‎ Rainwarrior talk contribs‎ 7,511 bytes +478‎ →‎Output: note on DAC and mixing
• curprev 07:2607:26, 6 May 2013‎ Rainwarrior talk contribs‎ 7,033 bytes −320‎ →‎Noise: removing Disch's description of LFSR (it is likely incorrect, will add new info when true behaviour can be determined)
• curprev 07:0907:09, 6 May 2013‎ Rainwarrior talk contribs‎ m 7,353 bytes −13‎ →‎Output: remove ambiguous suggestion
• curprev 07:0807:08, 6 May 2013‎ Rainwarrior talk contribs‎ 7,366 bytes −277‎ incorporating rest of Disch's Notes into article
• curprev 07:0207:02, 6 May 2013‎ Rainwarrior talk contribs‎ 7,643 bytes −2,758‎ →‎Disch's Notes: removing redundant / incorrect information
• curprev 05:5405:54, 6 May 2013‎ Lidnariq talk contribs‎ 10,401 bytes +3,615‎ Move Disch's notes on sound emulation from iNES Mapper 069

23 January 2013

• curprev 20:1920:19, 23 January 2013‎ Lidnariq talk contribs‎ m 6,786 bytes +6‎ →‎Audio Register Write ($E000): rename register to reflect mirroring
• curprev 20:1820:18, 23 January 2013‎ Lidnariq talk contribs‎ m 6,780 bytes +6‎ →‎Audio Register Select ($C000): rename register to reflect mirroring

26 May 2012

• curprev 19:4919:49, 26 May 2012‎ Rainwarrior talk contribs‎ m 6,774 bytes −26‎ rm ASIC mapper category (the FME-7 page is about the mapper)
• curprev 19:4719:47, 26 May 2012‎ Rainwarrior talk contribs‎ m 6,800 bytes +35‎ expansion audio category

11 March 2012

• curprev 12:4712:47, 11 March 2012‎ Tepples talk contribs‎ 6,765 bytes +24‎ The NES's own APU also runs at half speed (except for the triangle's pitch counter) according to results from visual 2a03
• curprev 11:2211:22, 11 March 2012‎ Rainwarrior talk contribs‎ 6,741 bytes −127‎ description of the YM2149F clock divider is a little inaccurate

10 March 2012

• curprev 23:3723:37, 10 March 2012‎ Rainwarrior talk contribs‎ 6,868 bytes +897‎ further clarification, 5B is really a YM2149F, and what this means for clock speed
• curprev 23:1623:16, 10 March 2012‎ Rainwarrior talk contribs‎ 5,971 bytes +16‎ →‎Registers: 5B seems to be a 2419
• curprev 21:4721:47, 10 March 2012‎ Rainwarrior talk contribs‎ 5,955 bytes +104‎ →‎Sound: formula formatting
• curprev 21:4421:44, 10 March 2012‎ Rainwarrior talk contribs‎ 5,851 bytes +481‎ →‎Envelope: more info about envelope pitch
• curprev 20:0920:09, 10 March 2012‎ Rainwarrior talk contribs‎ 5,370 bytes +164‎ →‎References: YM2149 datasheet
• curprev 19:1219:12, 10 March 2012‎ Drag talk contribs‎ m 5,206 bytes +14‎ Changing " to ¯, for a cleaner diagram.
• curprev 09:5409:54, 10 March 2012‎ Rainwarrior talk contribs‎ m 5,192 bytes 0‎ →‎Tone: had Clock rate link backwards
• curprev 09:1909:19, 10 March 2012‎ Rainwarrior talk contribs‎ 5,192 bytes +96‎ noise/tone mixer register actually enables if bit is clear, disables if bit is set, mixing is also logical AND not OR
• curprev 08:2308:23, 10 March 2012‎ Rainwarrior talk contribs‎ m 5,096 bytes −8‎ →‎Tone: formatting
• curprev 08:2208:22, 10 March 2012‎ Rainwarrior talk contribs‎ m 5,104 bytes +122‎ →‎Envelope: envelope speed again
• curprev 07:5807:58, 10 March 2012‎ Rainwarrior talk contribs‎ m 4,982 bytes −1‎ →‎Envelope: correcting envelope frequency (I think; documentation is confusing, emulators seem to do it this way)
• curprev 07:2907:29, 10 March 2012‎ Rainwarrior talk contribs‎ 4,983 bytes +152‎ reference datasheet
• curprev 07:2507:25, 10 March 2012‎ Rainwarrior talk contribs‎ 4,831 bytes +67‎ Register $0D resets the envelope
• curprev 06:5806:58, 10 March 2012‎ Rainwarrior talk contribs‎ m 4,764 bytes −1‎ →‎Envelope: spelling of formula
• curprev 06:5806:58, 10 March 2012‎ Rainwarrior talk contribs‎ m 4,765 bytes +61‎ →‎Sound: clarifying CPU clock