Famicom Network System: Revision history

18 March 2021

• curprev 03:3503:35, 18 March 2021‎ Ben Boldt talk contribs‎ m 97,111 bytes +635‎ →‎CPU2 Known Registers: Cleanup.

16 March 2021

• curprev 15:1015:10, 16 March 2021‎ Ben Boldt talk contribs‎ 96,476 bytes +9‎ →‎Commands Written by the Famicom to CPU2: Added a couple ways to disconnect the modem.
• curprev 14:4014:40, 16 March 2021‎ Ben Boldt talk contribs‎ 96,467 bytes +786‎ →‎CPU2 Known Registers: Added some IRQ / NMI info.

15 March 2021

• curprev 06:5306:53, 15 March 2021‎ Ben Boldt talk contribs‎ m 95,681 bytes +18‎ →‎Commands Written by the Famicom to CPU2: Reduced excessive width of command $11.
• curprev 04:0104:01, 15 March 2021‎ Ben Boldt talk contribs‎ m 95,663 bytes +45‎ →‎Commands Read by the Famicom from CPU2: Clarification in CPU2->FC command 0xC1.
• curprev 03:5403:54, 15 March 2021‎ Ben Boldt talk contribs‎ 95,618 bytes +1,623‎ →‎CPU2 Commands: Organized CPU2 read commands into a new section, added read commands $C0 and $C1.

14 March 2021

• curprev 23:1623:16, 14 March 2021‎ Ben Boldt talk contribs‎ 93,995 bytes +589‎ →‎CPU2 Commands: Added information to CPU2 command $03.
• curprev 22:0422:04, 14 March 2021‎ Ben Boldt talk contribs‎ m 93,406 bytes +20‎ →‎CPU2 Known Registers: Update CPU2 register $4102 description.
• curprev 21:2421:24, 14 March 2021‎ Ben Boldt talk contribs‎ 93,386 bytes +116‎ →‎CPU2 Commands: Added some CPU2 command responses.

28 February 2021

• curprev 22:3522:35, 28 February 2021‎ Ben Boldt talk contribs‎ 93,270 bytes +82‎ →‎Known Registers: Added note in register $40A3 about the effect on RF5C66 pin 79 as noted previously in the forum.

27 February 2021

• curprev 22:3222:32, 27 February 2021‎ Ben Boldt talk contribs‎ m 93,188 bytes −7‎ →‎CPU2 Commands: Minor fixes referencing CRC bytes within command descriptions.
• curprev 22:1522:15, 27 February 2021‎ Ben Boldt talk contribs‎ 93,195 bytes −144‎ →‎CPU2 Commands: Updated "lock" / encryption terminology to CRC as pointed out by lidnariq.
• curprev 10:0710:07, 27 February 2021‎ Ben Boldt talk contribs‎ 93,339 bytes +2,375‎ →‎CPU2 Commands: Added info about key/lock bytes.

20 February 2021

• curprev 03:5603:56, 20 February 2021‎ Ben Boldt talk contribs‎ m 90,964 bytes 0‎ →‎CPU2 Commands: Command $60 destination RAM address was incorrect.
• curprev 03:5003:50, 20 February 2021‎ Ben Boldt talk contribs‎ 90,964 bytes +758‎ →‎CPU2 Known Registers: More info for $4100/1/2

15 February 2021

• curprev 07:1907:19, 15 February 2021‎ Ben Boldt talk contribs‎ 90,206 bytes +938‎ →‎CPU2 Commands: Realized command $12 is also using the key bytes. Added info to command $10. Better use of brackets.
• curprev 05:4305:43, 15 February 2021‎ Ben Boldt talk contribs‎ 89,268 bytes +335‎ →‎Known Registers: Added Power-On-Reset values for some RF5C66 register write bits.
• curprev 04:1804:18, 15 February 2021‎ Ben Boldt talk contribs‎ m 88,933 bytes 0‎ →‎CPU2 Commands: $7C minor fixes
• curprev 04:1004:10, 15 February 2021‎ Ben Boldt talk contribs‎ 88,933 bytes +170‎ Added just a couple small items.
• curprev 04:0104:01, 15 February 2021‎ Ben Boldt talk contribs‎ 88,763 bytes +2,259‎ →‎Communication Between Famicom and CPU2: Added more command info.

14 February 2021

• curprev 23:5523:55, 14 February 2021‎ Ben Boldt talk contribs‎ 86,504 bytes +981‎ →‎CPU2 Known Registers: CPU2 register updates, list shadow registers at $0011=0016.
• curprev 22:0022:00, 14 February 2021‎ Ben Boldt talk contribs‎ 85,523 bytes −271‎ →‎Communication Between Famicom and CPU2: Removed "type" column. There is a way to read data but it does not work like I thought. Will add it back if new findings support it.
• curprev 21:4121:41, 14 February 2021‎ Ben Boldt talk contribs‎ 85,794 bytes +797‎ Details about CPU2 /Reset on older revisions Famicom Network System.
• curprev 20:2220:22, 14 February 2021‎ Ben Boldt talk contribs‎ 84,997 bytes +64‎ →‎CPU2 Command Bytes: Clarify hex values with '$'.
• curprev 05:2905:29, 14 February 2021‎ Ben Boldt talk contribs‎ 84,933 bytes +2,835‎ →‎Communication Between Famicom and CPU2: Improvements to command descriptions.

13 February 2021

• curprev 04:0904:09, 13 February 2021‎ Ben Boldt talk contribs‎ 82,098 bytes +534‎ →‎Communication Between Famicom and CPU2: Added column for which modes commands are supported in.

9 February 2021

• curprev 08:2208:22, 9 February 2021‎ Ben Boldt talk contribs‎ 81,564 bytes +5,471‎ →‎Communication Between Famicom and CPU2: Added Famicom <-> CPU2 command functions found by disassembling CPU2 ROM.

8 February 2021

• curprev 05:0705:07, 8 February 2021‎ Ben Boldt talk contribs‎ 76,093 bytes +2,684‎ Added information about Famicom <-> CPU2 communication, list of commands.

4 February 2021

• curprev 02:4002:40, 4 February 2021‎ Lidnariq talk contribs‎ m 73,409 bytes 0‎ discrete ≠ discreet
• curprev 01:5901:59, 4 February 2021‎ Ben Boldt talk contribs‎ 73,409 bytes +555‎ →‎Disk Drive Support: Added FDS pinout possibility

3 February 2021

• curprev 05:0805:08, 3 February 2021‎ Ben Boldt talk contribs‎ 72,854 bytes +614‎ →‎Known Registers: Added details about $40D5.
• curprev 04:0504:05, 3 February 2021‎ Ben Boldt talk contribs‎ 72,240 bytes +510‎ →‎Known Registers: Added more input pins found on $40D4.
• curprev 02:3902:39, 3 February 2021‎ Ben Boldt talk contribs‎ 71,730 bytes −57‎ Found +IRQ on CPU2, strangely enough.
• curprev 01:3101:31, 3 February 2021‎ Ben Boldt talk contribs‎ 71,787 bytes +115‎ Added more input bits found in RF5A18, including /NMI.

2 February 2021

• curprev 02:5702:57, 2 February 2021‎ Ben Boldt talk contribs‎ 71,672 bytes +58‎ Cleanup
• curprev 02:3602:36, 2 February 2021‎ Ben Boldt talk contribs‎ 71,614 bytes +709‎ →‎CPU2 Known Registers: Added more info about the Famicom <-> CPU2 interface registers.
• curprev 02:2502:25, 2 February 2021‎ Ben Boldt talk contribs‎ 70,905 bytes +1,248‎ →‎Known Registers: Added more information to $40Dx registers.

1 February 2021

• curprev 18:4918:49, 1 February 2021‎ Ben Boldt talk contribs‎ 69,657 bytes +2,730‎ Rearranged the page, added overview section, added disk drive section.
• curprev 18:0018:00, 1 February 2021‎ Ben Boldt talk contribs‎ m 66,927 bytes −63‎ Clarifications
• curprev 17:5117:51, 1 February 2021‎ Ben Boldt talk contribs‎ m 66,990 bytes +91‎ Clarifications
• curprev 05:2205:22, 1 February 2021‎ Ben Boldt talk contribs‎ 66,899 bytes +55‎ Added info about $40D3/4122 and $40D6/4113 register connections from CPU2 to Famicom CPU. Cleanup.
• curprev 03:0303:03, 1 February 2021‎ Ben Boldt talk contribs‎ 66,844 bytes +2,278‎ Added $40D0/4123, 40D1/4124, 40D2/4125 connections. Added registers $40D5 and $40D6

31 January 2021

• curprev 00:5400:54, 31 January 2021‎ Ben Boldt talk contribs‎ 64,566 bytes +83‎ →‎CPU2 Known Registers: Added theory that register $40D3 on Famicom CPU bus is dual-port with $4122 on CPU2 bus.

30 January 2021

• curprev 08:5908:59, 30 January 2021‎ Ben Boldt talk contribs‎ 64,483 bytes −39‎ →‎CPU2 Known Registers: Corrected error in CPU2 Register $4128
• curprev 05:0705:07, 30 January 2021‎ Ben Boldt talk contribs‎ 64,522 bytes +1,579‎ →‎CPU2 Known Registers: Added CPU2 read register information from $40 testing
• curprev 04:3104:31, 30 January 2021‎ Ben Boldt talk contribs‎ 62,943 bytes +5,141‎ →‎CPU2 Known Registers: Added more CPU2 register read bit findings based on runaway $8F branching and redoing $41 tests on the standalone RF5A18 setup.
• curprev 02:1302:13, 30 January 2021‎ Ben Boldt talk contribs‎ 57,802 bytes +464‎ →‎RF5A18 CPU2 Modem Controller: Confirmed correct CPU2 M2 pin on both of my setups is pin 19.

29 January 2021

• curprev 08:5208:52, 29 January 2021‎ Ben Boldt talk contribs‎ 57,338 bytes −113‎ Cleanup odds and ends
• curprev 08:2608:26, 29 January 2021‎ Ben Boldt talk contribs‎ 57,451 bytes +55‎ Added info about CPU2 register $4129 - P5 expansion port control.
• curprev 05:3605:36, 29 January 2021‎ Ben Boldt talk contribs‎ 57,396 bytes +1,275‎ →‎CPU2 Known Registers: Found a number of I/O pins in the CPU2 registers.

27 January 2021

• curprev 03:0803:08, 27 January 2021‎ Ben Boldt talk contribs‎ 56,121 bytes 0‎ →‎RF5A18 CPU2 Modem Controller: Identified /reset pin.

24 January 2021

• curprev 07:3107:31, 24 January 2021‎ Ben Boldt talk contribs‎ 56,121 bytes +14‎ →‎CPU2 Known Registers: Reviewed and removed several additional incorrect statements.
• curprev 07:1807:18, 24 January 2021‎ Ben Boldt talk contribs‎ 56,107 bytes −11‎ →‎CPU2 Known Registers: Removed incorrect statement from CPU2 register $4110
• curprev 07:1507:15, 24 January 2021‎ Ben Boldt talk contribs‎ 56,118 bytes −276‎ →‎CPU2 Known Registers: Removed $F0AC from CPU2, those weren't instructions I was looking at.
• curprev 07:0807:08, 24 January 2021‎ Ben Boldt talk contribs‎ 56,394 bytes +4,889‎ →‎CPU2 Known Registers: Added lots more register findings from the ROM.
• curprev 02:3202:32, 24 January 2021‎ Ben Boldt talk contribs‎ m 51,505 bytes +49‎ →‎CPU2 Known Registers: a couple minor CPU2 register notes
• curprev 02:0902:09, 24 January 2021‎ Ben Boldt talk contribs‎ m 51,456 bytes −5‎ →‎CPU2 Known Registers: typo
• curprev 02:0602:06, 24 January 2021‎ Ben Boldt talk contribs‎ m 51,461 bytes +65‎ →‎Expansion Audio
• curprev 01:4801:48, 24 January 2021‎ Ben Boldt talk contribs‎ 51,396 bytes +4,314‎ →‎CPU2 Known Registers: Added observations from CPU2 ROM disassembly.

23 January 2021

• curprev 20:0420:04, 23 January 2021‎ Ben Boldt talk contribs‎ 47,082 bytes +378‎ →‎Pinouts: Added P5 Expansion connector, older revisions only.
• curprev 18:4218:42, 23 January 2021‎ Ben Boldt talk contribs‎ m 46,704 bytes 0‎ →‎CPU2 Memory Map: typo fix
• curprev 06:2306:23, 23 January 2021‎ Ben Boldt talk contribs‎ m 46,704 bytes +4‎ →‎CPU2 Known Registers
• curprev 05:3705:37, 23 January 2021‎ Ben Boldt talk contribs‎ 46,700 bytes +13‎ →‎CPU2 Known Registers: Added info I just found about CPU2 $4129
• curprev 05:1805:18, 23 January 2021‎ Ben Boldt talk contribs‎ 46,687 bytes +5,709‎ Added information about CPU2 memory organization and registers

20 January 2021

• curprev 08:4508:45, 20 January 2021‎ Fiskbit talk contribs‎ 40,978 bytes 0‎ FCNS: Fixes the mirroring terminology (previously inverted).
• curprev 07:4607:46, 20 January 2021‎ Ben Boldt talk contribs‎ 40,978 bytes +126‎ →‎RF5A18 Modem Controller: Added CPU2 info

11 January 2021

• curprev 01:4001:40, 11 January 2021‎ Ben Boldt talk contribs‎ m 40,852 bytes +870‎ →‎P3: Expansion Connector: Added orientation for expansion connector. No new information added.

10 January 2021

• curprev 22:2722:27, 10 January 2021‎ Ben Boldt talk contribs‎ m 39,982 bytes +660‎ →‎Pinouts: Updated modem module edge connector with data directions. Created subsections for each pinout. No new info added.

8 January 2021

• curprev 08:1208:12, 8 January 2021‎ Ben Boldt talk contribs‎ m 39,322 bytes 0‎ →‎Pinouts: Filled in some question marks with previously found register bits in the 5C66 pinout.
• curprev 07:5307:53, 8 January 2021‎ Ben Boldt talk contribs‎ 39,322 bytes +18‎ →‎Known Registers: Confirmed $40C0 5C66 input pins 33 and 34 with bench test setup where I can isolate these pins from their normal connections.
• curprev 06:4206:42, 8 January 2021‎ Ben Boldt talk contribs‎ m 39,304 bytes −49‎ →‎Known Registers: removed accidental text

7 January 2021

• curprev 06:5806:58, 7 January 2021‎ Ben Boldt talk contribs‎ m 39,353 bytes −10‎ Changed phrase "Card RAM +CE" to just "RAM +CE" to avoid confusion. JRA-PAT doesn't use this signal in the card.
• curprev 05:3905:39, 7 January 2021‎ Ben Boldt talk contribs‎ 39,363 bytes +71‎ →‎Known Registers: Removed misleading information. These registers actually get a sequence of data read/written when dialing which I will post in the forum.
• curprev 04:2204:22, 7 January 2021‎ Ben Boldt talk contribs‎ 39,292 bytes +592‎ →‎Known Registers: Added observations of $40Dx registers when connecting/disconnecting
• curprev 03:2103:21, 7 January 2021‎ Ben Boldt talk contribs‎ 38,700 bytes +633‎ →‎Known Registers: Found how to write to 5C66 pins 36, 37 using $40C0 and pin 28 using $40AE. Updated mirroring control register from testing.

6 January 2021

• curprev 03:5303:53, 6 January 2021‎ Ben Boldt talk contribs‎ 38,067 bytes +112‎ Updated $40C0 and $40AE register descriptions based on information I found testing.

25 December 2020

• curprev 17:1817:18, 25 December 2020‎ Ben Boldt talk contribs‎ 37,955 bytes +136‎ →‎Known Registers: Clarified/updated stuff about IRQ acknowledging.
• curprev 17:0917:09, 25 December 2020‎ Ben Boldt talk contribs‎ 37,819 bytes +343‎ →‎Known Registers: Clean up $40A6/7
• curprev 04:5504:55, 25 December 2020‎ Ben Boldt talk contribs‎ m 37,476 bytes 0‎ →‎Pinouts: typo fix
• curprev 00:4000:40, 25 December 2020‎ Ben Boldt talk contribs‎ 37,476 bytes +445‎ →‎Known Registers: Added $40A9/$40AA/$40AB/RF5C66 pin 45 info

24 December 2020

• curprev 04:1804:18, 24 December 2020‎ Ben Boldt talk contribs‎ m 37,031 bytes +48‎ →‎Pinouts: alignment
• curprev 04:1604:16, 24 December 2020‎ Ben Boldt talk contribs‎ m 36,983 bytes 0‎ →‎Known Registers: Typo fix, modem module pin 31, not 21.
• curprev 04:1404:14, 24 December 2020‎ Ben Boldt talk contribs‎ 36,983 bytes +648‎ →‎Pinouts: Showing data directions on game card and expansion connectors
• curprev 03:4003:40, 24 December 2020‎ Ben Boldt talk contribs‎ m 36,335 bytes +170‎ - Info about mirroring
• curprev 03:3103:31, 24 December 2020‎ Ben Boldt talk contribs‎ 36,165 bytes +301‎ →‎Known Registers: Added more input pin register bits found.
• curprev 00:3900:39, 24 December 2020‎ Ben Boldt talk contribs‎ 35,864 bytes +130‎ →‎Known Registers: Added pin functions found in register $40C0
• curprev 00:2000:20, 24 December 2020‎ Ben Boldt talk contribs‎ 35,734 bytes +239‎ →‎Pinouts: Added detail about 5C66 pin 79

23 December 2020

• curprev 07:3207:32, 23 December 2020‎ Ben Boldt talk contribs‎ 35,495 bytes +190‎ →‎Pinouts: Updated CIC pinouts based on SNES F411 pinout found by Google from jwdonal/nocash
• curprev 03:0203:02, 23 December 2020‎ Ben Boldt talk contribs‎ 35,305 bytes +115‎ →‎Known Registers: Added info about acknowledging IRQ by reading $40A2.
• curprev 00:4200:42, 23 December 2020‎ Ben Boldt talk contribs‎ 35,190 bytes +364‎ →‎Known Registers: More IRQ/counter details found, similar to FDS.
• curprev 00:2200:22, 23 December 2020‎ Ben Boldt talk contribs‎ 34,826 bytes +18‎ →‎Known Registers: Added info about cycle counter and IRQ.

22 December 2020

• curprev 23:2223:22, 22 December 2020‎ Ben Boldt talk contribs‎ 34,808 bytes +58‎ →‎Known Registers: Added newly found Exp 7/8/9 read values in $40A5.
• curprev 02:0802:08, 22 December 2020‎ Ben Boldt talk contribs‎ 34,750 bytes +370‎ →‎Pinouts: Added info about CIC pins
• curprev 01:1001:10, 22 December 2020‎ Ben Boldt talk contribs‎ 34,380 bytes +269‎ →‎Pinouts: Added some clock signals observed.

20 December 2020

• curprev 08:3308:33, 20 December 2020‎ Ben Boldt talk contribs‎ 34,111 bytes +7‎ →‎Pinouts: Updated names of Kanji ROM address pins on the RF5C66 pinout

19 December 2020

• curprev 23:4123:41, 19 December 2020‎ Ben Boldt talk contribs‎ 34,104 bytes +1,369‎ →‎Known Registers: Added more register bitfields showing existence of bits from bench test
• curprev 23:0723:07, 19 December 2020‎ Ben Boldt talk contribs‎ 32,735 bytes +461‎ →‎Known Registers
• curprev 22:4922:49, 19 December 2020‎ Ben Boldt talk contribs‎ m 32,274 bytes 0‎ →‎Pinouts
• curprev 22:4922:49, 19 December 2020‎ Ben Boldt talk contribs‎ 32,274 bytes +333‎ →‎Pinouts: Renamed Built-in RAM +CE since the old name "Card RAM +CE" was misleading.
• curprev 19:2919:29, 19 December 2020‎ Ben Boldt talk contribs‎ 31,941 bytes +359‎ →‎Pinouts: Update Kanji ROM pinout