MMC1: Revision history

8 April 2024

• curprev 17:2117:21, 8 April 2024‎ Tepples talk contribs‎ 19,101 bytes +76‎ →‎PRG bank (internal, $E000-$FFFF): "affected" and "bypassed" were unclear

26 January 2024

• curprev 06:0806:08, 26 January 2024‎ Fiskbit talk contribs‎ m 19,025 bytes +113‎ Adds a reference to a forum thread about the MMC MULTI CHECKER-02 development board.

25 January 2024

• curprev 14:3314:33, 25 January 2024‎ Fiskbit talk contribs‎ m 18,912 bytes +8‎ →‎Reset: Wording.
• curprev 11:4211:42, 25 January 2024‎ Fiskbit talk contribs‎ 18,904 bytes +331‎ →‎Reset: Adds a note about why some games do reset writes to all 4 MMC1 registers.

14 October 2022

• curprev 00:3600:36, 14 October 2022‎ Fiskbit talk contribs‎ 18,573 bytes +960‎ Moves the shift register explanation, examples, and consecutive writes part of Registers into their own section, organized in a way that should improve clarity. Improves the explanation. Adds reset examples.

13 October 2022

• curprev 15:0515:05, 13 October 2022‎ Fiskbit talk contribs‎ 17,613 bytes +93‎ →‎Load register ($8000-$FFFF): Adds note to Load register about D0 being ignored on consecutive-cycle writes.

12 October 2022

• curprev 19:2919:29, 12 October 2022‎ Lidnariq talk contribs‎ m 17,520 bytes +35‎ →‎Load register ($8000-$FFFF): clarify that the MSbit isn't a latch, just an instant effect

10 July 2022

• curprev 04:0404:04, 10 July 2022‎ Fiskbit talk contribs‎ 17,485 bytes +3,000‎ Adds FCNS 2ME board as MMC1 submapper 6.

8 July 2022

• curprev 23:4323:43, 8 July 2022‎ Fiskbit talk contribs‎ m 14,485 bytes +12‎ Adds horizontal lines between variants for clarity.

7 April 2022

• curprev 18:1318:13, 7 April 2022‎ Ben Boldt talk contribs‎ 14,473 bytes +107‎ →‎Hardware: Added mention of MMC1B2F.
• curprev 13:3413:34, 7 April 2022‎ Fiskbit talk contribs‎ 14,366 bytes +137‎ Updates the MMC1 CHR bit assignments to have the PRG RAM bits in the correct order and updates the text. (The old text was correct as a whole, but very misleading.)

6 April 2022

• curprev 20:4920:49, 6 April 2022‎ Fiskbit talk contribs‎ 14,229 bytes +245‎ Rewrites section on consecutive writes and notes new (albeit not explicitly tested) finding that reset works on any write cycle.

10 February 2022

• curprev 19:1819:18, 10 February 2022‎ NewRisingSun talk contribs‎ 13,984 bytes +71‎ The existence of the MMC1C has not been confirmed

4 January 2022

• curprev 20:0220:02, 4 January 2022‎ Tepples talk contribs‎ 13,913 bytes +103‎ →‎PRG bank (internal, $E000-$FFFF): Bit 3 bypasses fixed bank logic (confirmed through combined effort of NRS, Pino, KMLbay)
• curprev 19:5919:59, 4 January 2022‎ Tepples talk contribs‎ 13,810 bytes +213‎ →‎Hardware: Translated datasheet provided by NewRisingSun led to a test ROM by yours truly, and the test result provided by KMLbay confirms a second behavior difference

6 May 2021

• curprev 15:2915:29, 6 May 2021‎ Quietust talk contribs‎ m 13,597 bytes +8‎ →‎CHR bank 0 (internal, $A000-$BFFF): fix copy/paste error - only the lowest bit is ignored in 8KB mode

26 February 2021

• curprev 23:1523:15, 26 February 2021‎ Lidnariq talk contribs‎ 13,589 bytes −41‎ →‎Hardware: series resistor is prevent blowing up the battery if the diode fails
• curprev 22:1922:19, 26 February 2021‎ Tepples talk contribs‎ 13,630 bytes +45‎ →‎Hardware: AX5904 == MMC1A per jiggleyjelo/Poor Student Hobbyist

25 March 2019

• curprev 21:1221:12, 25 March 2019‎ Lidnariq talk contribs‎ 13,585 bytes +726‎ add SZROM

23 January 2019

• curprev 18:1118:11, 23 January 2019‎ Ben Boldt talk contribs‎ 12,859 bytes +20‎ Added infobox pinout link

24 December 2018

• curprev 20:1820:18, 24 December 2018‎ Lidnariq talk contribs‎ 12,839 bytes +438‎ →‎Control (internal, $8000-$9FFF): mention power-on state gotchas.

2 October 2018

• curprev 21:3721:37, 2 October 2018‎ Rainwarrior talk contribs‎ m 12,401 bytes 0‎ →‎iNES Mapper 001: 32k, I think I was thinking MMC5
• curprev 21:3621:36, 2 October 2018‎ Rainwarrior talk contribs‎ m 12,401 bytes 0‎ →‎iNES Mapper 001: put the line descriptions directly after the diagram
• curprev 21:3521:35, 2 October 2018‎ Rainwarrior talk contribs‎ 12,401 bytes +239‎ →‎iNES Mapper 001: note about the power on state and 32k MMC1 with no PRG banking
• curprev 20:2520:25, 2 October 2018‎ Rainwarrior talk contribs‎ 12,162 bytes −1,307‎ →‎iNES Mapper 001: removing confusing "heuristic" formula

29 September 2018

• curprev 16:4816:48, 29 September 2018‎ Rainwarrior talk contribs‎ 13,469 bytes +173‎ trying to make it more clear that 512K isn't quite convenient

21 September 2018

• curprev 07:0707:07, 21 September 2018‎ Bregalad talk contribs‎ 13,296 bytes −29‎ PRG-RAM is optional, remove the inclusion of potentially confusing information about variant boards (SXROM etc...) straight into the introduction paragraph.

1 June 2018

• curprev 05:1905:19, 1 June 2018‎ NovaSquirrel talk contribs‎ 13,325 bytes +49‎ Creating the single screen mirroring category

31 March 2018

• curprev 20:2320:23, 31 March 2018‎ Lidnariq talk contribs‎ 13,276 bytes +23‎ →‎CHR bank 1 (internal, $C000-$DFFF): rephrase point that caused my earlier confusion

30 March 2018

• curprev 23:2223:22, 30 March 2018‎ Lidnariq talk contribs‎ m 13,253 bytes 0‎ Reverted edits by Lidnariq (talk) to last revision by NewRisingSun
• curprev 23:2123:21, 30 March 2018‎ Lidnariq talk contribs‎ 13,253 bytes 0‎ →‎CHR bank 1 (internal, $C000-$DFFF): out of sync?

11 March 2018

• curprev 04:1104:11, 11 March 2018‎ NewRisingSun talk contribs‎ m 13,253 bytes +44‎ Add Category:NES 2.0 mappers with submappers category.

31 March 2017

• curprev 09:3709:37, 31 March 2017‎ Bregalad talk contribs‎ 13,209 bytes +22‎ →‎Registers: Wrong explaination given in regard to rejection of multiple writes.

5 June 2016

• curprev 02:5702:57, 5 June 2016‎ Lidnariq talk contribs‎ m 13,187 bytes 0‎ omit link to redirect to self

4 June 2016

• curprev 19:2419:24, 4 June 2016‎ Rainwarrior talk contribs‎ 13,187 bytes +1,531‎ merge material from INES Mapper 001

30 May 2016

• curprev 21:1721:17, 30 May 2016‎ Rainwarrior talk contribs‎ m 11,656 bytes +11‎ →‎NES 2.0 combined implementation: clarify that SXROM means 32k
• curprev 21:1621:16, 30 May 2016‎ Rainwarrior talk contribs‎ 11,645 bytes +435‎ noting that PRG RAM address lines are reversed for SXROM
• curprev 20:0320:03, 30 May 2016‎ Rainwarrior talk contribs‎ 11,210 bytes +760‎ →‎Variants: NES 2.0 combined implementation

23 May 2015

• curprev 08:2208:22, 23 May 2015‎ Koitsu talk contribs‎ 10,450 bytes +41‎ No edit summary
• curprev 08:2008:20, 23 May 2015‎ Koitsu talk contribs‎ 10,409 bytes +109‎ →‎Registers
• curprev 08:1808:18, 23 May 2015‎ Koitsu talk contribs‎ 10,300 bytes +251‎ →‎Registers

20 May 2015

• curprev 08:5808:58, 20 May 2015‎ Bregalad talk contribs‎ 10,049 bytes +16‎ →‎See also: Wikilink to MMC1's pinout

24 April 2015

• curprev 18:3318:33, 24 April 2015‎ Rainwarrior talk contribs‎ m 10,033 bytes 0‎ _ removal
• curprev 18:3218:32, 24 April 2015‎ Rainwarrior talk contribs‎ m 10,033 bytes −13‎ fix infobox template redirect

22 April 2015

• curprev 08:5508:55, 22 April 2015‎ Lidnariq talk contribs‎ m 10,046 bytes +47‎ infobox MMC1 othermapers should be 105 and 155, not "3"

21 April 2015

• curprev 22:2622:26, 21 April 2015‎ Tepples talk contribs‎ 9,999 bytes +34‎ →‎Banks: RAM is switchable on some boards
• curprev 22:2522:25, 21 April 2015‎ Tepples talk contribs‎ 9,965 bytes +10‎ Overview overhaul
• curprev 21:2521:25, 21 April 2015‎ Rainwarrior talk contribs‎ m 9,955 bytes +38‎ Category:Nintendo licensed mappers
• curprev 10:0610:06, 21 April 2015‎ Bregalad talk contribs‎ 9,917 bytes +154‎ Added link to \Firebug\'s very valuable doc, even if it's not accurate it's layed out and worded very nicely

11 September 2014

• curprev 04:0804:08, 11 September 2014‎ Koitsu talk contribs‎ 9,763 bytes −33‎ Removal of syntax highlighter