VRC7 audio: Revision history

8 April 2014

• curprev 22:0622:06, 8 April 2014‎ Lidnariq talk contribs‎ m 9,415 bytes +3‎ naruko pointed out that calling it the "n163" is technically incorrect

25 August 2013

• curprev 07:3207:32, 25 August 2013‎ Koitsu talk contribs‎ 9,412 bytes −4‎ No edit summary

24 August 2013

• curprev 09:1709:17, 24 August 2013‎ Koitsu talk contribs‎ 9,416 bytes +17‎ →‎Register Write Delay

18 October 2012

• curprev 18:2518:25, 18 October 2012‎ Zzo38 talk contribs‎ 9,399 bytes −4‎ No edit summary

20 August 2012

• curprev 06:4006:40, 20 August 2012‎ Rainwarrior talk contribs‎ 9,403 bytes +139‎ →‎References: new patch set forum reference
• curprev 06:3906:39, 20 August 2012‎ Rainwarrior talk contribs‎ 9,264 bytes 0‎ →‎Internal patch set: new patch set

3 August 2012

• curprev 20:0120:01, 3 August 2012‎ Zzo38 talk contribs‎ 9,264 bytes +137‎ No edit summary

19 July 2012

• curprev 04:1904:19, 19 July 2012‎ Rainwarrior talk contribs‎ 9,127 bytes +24‎ →‎Channels: oscillator is not quartz; less accurate ceramic

5 July 2012

• curprev 06:3506:35, 5 July 2012‎ Rainwarrior talk contribs‎ m 9,103 bytes −66‎ →‎Differences from OPLL: likely none of them are exactly the same

26 May 2012

• curprev 19:4519:45, 26 May 2012‎ Rainwarrior talk contribs‎ m 9,169 bytes +3‎ expansion audio category

16 May 2012

• curprev 21:2421:24, 16 May 2012‎ Rainwarrior talk contribs‎ m 9,166 bytes +16‎ →‎Channels
• curprev 21:1621:16, 16 May 2012‎ Rainwarrior talk contribs‎ 9,150 bytes +81‎ →‎Channels: note about trigger bit (writing 1 does not always retrigger), noting output is serial, revising relationship to NES CPU rate (it is double, to within the accuracy of a quartz oscillator; 1/10 Hz is too fine for the given accuracy)
• curprev 18:3418:34, 16 May 2012‎ Rainwarrior talk contribs‎ m 9,069 bytes +23‎ →‎Register Write Delay
• curprev 17:3917:39, 16 May 2012‎ Rainwarrior talk contribs‎ 9,046 bytes +339‎ →‎Registers: example delay code from Lagrange Point
• curprev 14:1314:13, 16 May 2012‎ Tepples talk contribs‎ 8,707 bytes +72‎ →‎Channels: Twice M2
• curprev 07:0307:03, 16 May 2012‎ Rainwarrior talk contribs‎ 8,635 bytes +214‎ →‎Channels: more accurate update frequency
• curprev 05:4005:40, 16 May 2012‎ Rainwarrior talk contribs‎ 8,421 bytes −1‎ →‎Internal patch set: much better patch set
• curprev 03:5103:51, 16 May 2012‎ Rainwarrior talk contribs‎ m 8,422 bytes +6‎ →‎Audio Register Select ($9010)
• curprev 03:3303:33, 16 May 2012‎ Rainwarrior talk contribs‎ 8,416 bytes −36‎ →‎Registers: found the address/write timings in the OPLL datasheet, will test them more thoroughly later
• curprev 02:3402:34, 16 May 2012‎ Tepples talk contribs‎ 8,452 bytes +49‎ →‎Custom Patch: half-wave rectified explained
• curprev 02:1302:13, 16 May 2012‎ Rainwarrior talk contribs‎ 8,403 bytes +17‎ →‎Custom Patch: waveform is sine or half-wave rectified sine, not abs(sin)
• curprev 02:0002:00, 16 May 2012‎ Rainwarrior talk contribs‎ 8,386 bytes +481‎ →‎Registers: delay is required between writes

13 April 2012

• curprev 21:1521:15, 13 April 2012‎ Rainwarrior talk contribs‎ m 7,905 bytes +16‎ →‎Registers: hierarchy
• curprev 21:1421:14, 13 April 2012‎ Rainwarrior talk contribs‎ m 7,889 bytes +73‎ →‎Custom Patch: formatting
• curprev 20:5820:58, 13 April 2012‎ Rainwarrior talk contribs‎ m 7,816 bytes +22‎ →‎Channels: formatting
• curprev 20:5520:55, 13 April 2012‎ Rainwarrior talk contribs‎ 7,794 bytes +130‎ →‎Channels: sustain bit
• curprev 20:5220:52, 13 April 2012‎ Rainwarrior talk contribs‎ 7,664 bytes +2,257‎ →‎Custom Patch: explaining parameters
• curprev 20:0120:01, 13 April 2012‎ Rainwarrior talk contribs‎ m 5,407 bytes +85‎ more clarification of volume
• curprev 19:4719:47, 13 April 2012‎ Rainwarrior talk contribs‎ m 5,322 bytes +437‎ clarifying relationship to OPLL
• curprev 19:4019:40, 13 April 2012‎ Rainwarrior talk contribs‎ 4,885 bytes +131‎ →‎References: adding YM2413 datasheets
• curprev 19:3819:38, 13 April 2012‎ Rainwarrior talk contribs‎ m 4,754 bytes +60‎ →‎Registers: write-only
• curprev 19:3719:37, 13 April 2012‎ Rainwarrior talk contribs‎ m 4,694 bytes −4‎ →‎Custom patch: unused bit is documented unused on YM2413 datasheet
• curprev 19:3119:31, 13 April 2012‎ Rainwarrior talk contribs‎ m 4,698 bytes +14‎ →‎References: fixing link
• curprev 19:3019:30, 13 April 2012‎ Rainwarrior talk contribs‎ 4,684 bytes +1,004‎ explaining channel registers
• curprev 18:4918:49, 13 April 2012‎ Rainwarrior talk contribs‎ 3,680 bytes +2,697‎ filling out VRC7 info

12 June 2009

• curprev 12:4612:46, 12 June 2009‎ Banshaku talk contribs‎ m 983 bytes +983‎ Created page with '===VRC7 Audio=== The Konami VRC7, in addition to being a mapper chip, also produces 6 channels of 2-operator FM Synthesis Audio. The synthesis core appears to be mostly ...'