Namco 163 audio: Revision history

14 April 2023

• curprev 05:2305:23, 14 April 2023‎ Lidnariq talk contribs‎ 10,321 bytes +294‎ →‎Sound RAM $7C - High Frequency and Wave Length: mention how 129 differs here

10 February 2020

• curprev 04:4304:43, 10 February 2020‎ Ben Boldt talk contribs‎ m 10,027 bytes +1‎ →‎Channel Update: Recalculated using exact nominal CPU speeds, NTSC = 21.477272MHz/12, PAL = 26.601712MHz/16

9 February 2020

• curprev 21:2821:28, 9 February 2020‎ Ben Boldt talk contribs‎ 10,026 bytes +176‎ →‎Channel Update: Updated update frequencies per NTSC CPU = 1.79 MHz and PAL CPU = 1.66 MHz.

1 July 2019

• curprev 16:2016:20, 1 July 2019‎ Tepples talk contribs‎ 9,850 bytes −94‎ Undo revision 16774 by Tepples (talk): It also affects 5B. The situation is more complex than I thought and must be clarified elsewhere.
• curprev 15:5315:53, 1 July 2019‎ Tepples talk contribs‎ 9,944 bytes +94‎ →‎Sound Enable ($E000-E7FF): Also affects VRC7 in a multichip NSF

17 September 2018

• curprev 19:1419:14, 17 September 2018‎ Rainwarrior talk contribs‎ 9,850 bytes −40‎ removing obscure reference to Ensonic DOC (I think it gets in the way of comprehension to open with a tangent)

31 August 2018

• curprev 20:1420:14, 31 August 2018‎ Rainwarrior talk contribs‎ 9,890 bytes +75‎ →‎Sound RAM $7C - High Frequency and Wave Length: easier way to read this?

24 August 2018

• curprev 19:4019:40, 24 August 2018‎ StinkerB06 talk contribs‎ m 9,815 bytes 0‎ →‎Sound Enable ($E000-E7FF)

23 August 2018

• curprev 21:3021:30, 23 August 2018‎ Rainwarrior talk contribs‎ m 9,815 bytes +1‎ →‎Waveform: another an to be consistent with last edit
• curprev 19:5119:51, 23 August 2018‎ StinkerB06 talk contribs‎ m 9,814 bytes +32‎ No edit summary

9 August 2018

• curprev 21:4121:41, 9 August 2018‎ Rainwarrior talk contribs‎ m 9,782 bytes −6‎ →‎Mixing: I think most of this wiki consistently uses ō rather than ou (and it probably helps to be consistent with Bootgod, TOSEC, etc.)
• curprev 21:3021:30, 9 August 2018‎ Rainwarrior talk contribs‎ 9,788 bytes −313‎ →‎Mixing: merging the sample tables
• curprev 21:2521:25, 9 August 2018‎ Rainwarrior talk contribs‎ 10,101 bytes +450‎ →‎Mixing: restoring some of the note about simplified mixing approximation (though really we should produce a table of measured relative volume for 1 channel at each active channel count)
• curprev 19:5919:59, 9 August 2018‎ NewRisingSun talk contribs‎ 9,651 bytes +107‎ →‎Mixing
• curprev 19:5819:58, 9 August 2018‎ NewRisingSun talk contribs‎ 9,544 bytes −772‎ →‎Mixing

12 October 2016

• curprev 01:5301:53, 12 October 2016‎ Rainwarrior talk contribs‎ m 10,316 bytes +52‎ →‎References: add link to Namcot 163 family pinout

23 April 2015

• curprev 10:2510:25, 23 April 2015‎ PGCX864 talk contribs‎ 10,264 bytes +94‎ →‎Waveform

16 November 2014

• curprev 01:5101:51, 16 November 2014‎ Lidnariq talk contribs‎ m 10,170 bytes +3‎ same rounding as used elsewiki

8 April 2014

• curprev 22:1122:11, 8 April 2014‎ Lidnariq talk contribs‎ 10,167 bytes −6‎ naruko pointed out that calling it the "n163" is technically incorrect

6 September 2013

• curprev 01:2001:20, 6 September 2013‎ Lidnariq talk contribs‎ m 10,173 bytes −1‎ →‎Sound RAM $7D - High Phase: typo

18 July 2013

• curprev 20:3820:38, 18 July 2013‎ Rainwarrior talk contribs‎ 10,174 bytes −178‎ →‎Mixing: moving resistors to talk page so we can verify first
• curprev 18:5418:54, 18 July 2013‎ Lidnariq talk contribs‎ m 10,352 bytes +178‎ →‎Mixing: see also iNES Mapper 210 where I initially put these values.
• curprev 17:5717:57, 18 July 2013‎ Rainwarrior talk contribs‎ m 10,174 bytes −59‎ →‎Mixing: revising wording, don't want to characterize Rolling Thunder as an outlier, it's probably the norm (after comparing the other games)
• curprev 17:4217:42, 18 July 2013‎ Rainwarrior talk contribs‎ 10,233 bytes +63‎ →‎Mixing: estimating volume based on listening comparisons (arbitrary, but better than nothing)
• curprev 17:2317:23, 18 July 2013‎ Rainwarrior talk contribs‎ 10,170 bytes +1,167‎ →‎Mixing: measured more carts, apparently there is an even wider variation than expected

17 July 2013

• curprev 21:0721:07, 17 July 2013‎ Rainwarrior talk contribs‎ 9,003 bytes +959‎ notes on mixing/output
• curprev 20:5720:57, 17 July 2013‎ Rainwarrior talk contribs‎ 8,044 bytes +216‎ →‎Channel Update: note about bias
• curprev 20:4820:48, 17 July 2013‎ Rainwarrior talk contribs‎ 7,828 bytes +453‎ adding frequency section
• curprev 20:4220:42, 17 July 2013‎ Rainwarrior talk contribs‎ 7,375 bytes −706‎ →‎Operation: changing this section to "waveform", will put frequency in its own section
• curprev 20:2820:28, 17 July 2013‎ Rainwarrior talk contribs‎ m 8,081 bytes +118‎ →‎Registers: naming registers
• curprev 20:2520:25, 17 July 2013‎ Rainwarrior talk contribs‎ 7,963 bytes +570‎ →‎Registers: adding phase registers

14 July 2013

• curprev 23:0823:08, 14 July 2013‎ Rainwarrior talk contribs‎ 7,393 bytes +254‎ →‎Registers: sound enable register

11 February 2013

• curprev 18:0518:05, 11 February 2013‎ Tepples talk contribs‎ 7,139 bytes −19‎ subtle revision to conform to blargg's "clock", "dot", and "cycle" terminology (http://forums.nesdev.com/viewtopic.php?p=69003#p69003) where a "clock" is the master clock, and there are 12 or 16 clocks in a CPU cycle
• curprev 17:3817:38, 11 February 2013‎ Rainwarrior talk contribs‎ m 7,158 bytes +18‎ "possibly" sounds unsure, it's definitely there

10 February 2013

• curprev 20:5920:59, 10 February 2013‎ Lidnariq talk contribs‎ 7,140 bytes −7‎ eradicate n106 mentions

31 August 2012

• curprev 19:5219:52, 31 August 2012‎ Tepples talk contribs‎ m 7,147 bytes −22‎ Parodius Da? more like Parodius DEL

26 May 2012

• curprev 19:4819:48, 26 May 2012‎ Rainwarrior talk contribs‎ m 7,169 bytes +4‎ linking N106
• curprev 19:4619:46, 26 May 2012‎ Rainwarrior talk contribs‎ m 7,165 bytes +29‎ expansion audio category

17 May 2012

• curprev 19:2719:27, 17 May 2012‎ Rainwarrior talk contribs‎ m 7,136 bytes +33‎ →‎Channel Update: low-pass filter isn't required (the ear simply ignores ultrasonic frequency), and actually rather cheap TVs often have strong high frequency response
• curprev 19:2119:21, 17 May 2012‎ Rainwarrior talk contribs‎ 7,103 bytes +4‎ →‎Channel Update: a low pass filter isn't necessarily required
• curprev 16:5016:50, 17 May 2012‎ Tepples talk contribs‎ m 7,099 bytes −272‎ Turned out that what I'd written in the lead duplicated what was in Channel Update. Reorganizing.
• curprev 16:4516:45, 17 May 2012‎ Tepples talk contribs‎ 7,371 bytes +351‎ Why 6 channels are special

21 April 2012

• curprev 22:1322:13, 21 April 2012‎ Rainwarrior talk contribs‎ 7,020 bytes +708‎ →‎Channel Update: speculative version of channel update operation
• curprev 21:4621:46, 21 April 2012‎ Rainwarrior talk contribs‎ m 6,312 bytes −12‎ rm unnecessary reference
• curprev 21:4521:45, 21 April 2012‎ Rainwarrior talk contribs‎ 6,324 bytes +1,008‎ notes on rate of update and noise at update frequency

31 March 2012

• curprev 00:2500:25, 31 March 2012‎ Jarhmander talk contribs‎ m 5,316 bytes +3‎ Formula ((64-L)*4) not consistent with register description. Ajust example so it still has a length of 28 samples.
• curprev 00:1900:19, 31 March 2012‎ Jarhmander talk contribs‎ m 5,313 bytes +1‎ Formula ((64-L)*4) not consistent with register description.

11 March 2012

• curprev 13:1013:10, 11 March 2012‎ Rainwarrior talk contribs‎ 5,312 bytes +1‎ →‎Sound RAM $7C: length value is actually 6-bit according to jsr, some games like Rolling Thunder make use of long samples this way

10 March 2012

• curprev 07:3307:33, 10 March 2012‎ Rainwarrior talk contribs‎ 5,311 bytes +88‎ clarify use of sample memory

8 November 2011

• curprev 08:3208:32, 8 November 2011‎ Drag talk contribs‎ m 5,223 bytes +100‎ →‎Other Channels: Need to mention that disabling channels frees up ram.