User contributions for Fiskbit
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17 January 2024
- 16:5616:56, 17 January 2024 diff hist +126 N File:Famicom-3D-System.jpg The Famicom 3D System, a 3D shutter-glass expansion port device. Image by Evan Amos current
- 15:4915:49, 17 January 2024 diff hist −43 m Turbo File Reverted edits by Retronika (talk) to last revision by Qalle Tag: Rollback
- 15:3215:32, 17 January 2024 diff hist +31 N Famicom 3D glasses Fiskbit moved page Famicom 3D glasses to Famicom 3D System: Moves page to match the device's name. current Tag: New redirect
- 15:3215:32, 17 January 2024 diff hist 0 m Famicom 3D System Fiskbit moved page Famicom 3D glasses to Famicom 3D System: Moves page to match the device's name.
16 January 2024
- 21:1121:11, 16 January 2024 diff hist +118 m PPU rendering Cleans up some sentences. Adds a reference for the greyscale disable behavior.
- 20:5020:50, 16 January 2024 diff hist +3,980 PPU rendering Replaces the preface section with a walk through the background rendering pipeline and pixel selection logic.
- 14:1314:13, 16 January 2024 diff hist 0 m PPU attribute tables Typo. (x by y, not y by x) current
15 January 2024
- 20:0920:09, 15 January 2024 diff hist +385 PPU rendering Updates the register rendering diagram: Cleans up the attributes side, explains when transfers happen, adds EXT input/output.
- 13:3313:33, 15 January 2024 diff hist +2,041 Arkanoid controller Adds a section on DPCM safety, because the Arkanoid controller has even more potential problems with DMC DMA than other controllers. Notes that a conversion should be started some time before the very first controller read to ensure valid data. current
14 January 2024
- 15:4215:42, 14 January 2024 diff hist −90 m Game bugs Removes sorting from the tables because the entries are already sorted and using sorting misorders entries starting with The.
- 15:3615:36, 14 January 2024 diff hist +516 Game bugs Adds Ai Senshi Nicol FDS race condition.
- 00:0800:08, 14 January 2024 diff hist +109 Controller reading code →DPCM Safety using Repeated Reads: Explains why repeated reads have a cycle budget.
13 January 2024
- 09:5909:59, 13 January 2024 diff hist +30 Controller reading code Notes that the DPCM bug is fixed on PAL.
- 09:5309:53, 13 January 2024 diff hist +4,825 Controller reading code Adds a DPCM Safety preamble explaining the bug and limitations common to all approaches. Adds (comprehensive?) pros and cons for each approach. Cleans up the synced reads explanation.
27 December 2023
- 10:3610:36, 27 December 2023 diff hist +118 Game bugs Adds Super Cars as another example of a game relying on the $2004 read functionality added in the 2C02G.
26 December 2023
- 21:4921:49, 26 December 2023 diff hist +2 m Tools Updates the dead Famitracker links to its new website.
18 December 2023
- 17:1117:11, 18 December 2023 diff hist +22 Tools →General NES graphics studios: Notes the supported platforms for RetroSpriteEditor.
- 17:0917:09, 18 December 2023 diff hist +110 Tools →General NES graphics studios: Adds RetroSpriteEditor.
15 December 2023
- 09:5809:58, 15 December 2023 diff hist +538 Game bugs →Reliance on RAM values: Adds Keroppi to Keroriinu no Splash Bomb! crash bug.
13 December 2023
- 04:4604:46, 13 December 2023 diff hist +8 m PPU registers →Internal registers: Wording on v description.
10 December 2023
- 23:5223:52, 10 December 2023 diff hist 0 m NES 2.0 Reverses the order of Dn..Dm bits in the documentation to be high to low, matching the endianness we use within the bytes themselves. This addresses confusion about whether the data was stored in reverse.
- 12:1312:13, 10 December 2023 diff hist −139 m PPU scrolling Reverted edits by Binary-sequence (talk) to last revision by Jroweboy Tag: Rollback
- 12:1112:11, 10 December 2023 diff hist +798 PPU registers Better-integrates internal registers into this page. Makes improvements to the PPUSCROLL and PPADDR descriptions.
16 November 2023
- 00:4800:48, 16 November 2023 diff hist +115 FDS disk format →Disk info block (block 1): Not all prototype disks follow the presumed "Disk version" format. current
- 00:4600:46, 16 November 2023 diff hist +324 Game bugs Corrections and more details regarding Gimmick input glitches.
14 November 2023
- 17:0717:07, 14 November 2023 diff hist +333 PPU registers →The PPUDATA read buffer (post-fetch): More improvements for clarity based on feedback.
- 12:3112:31, 14 November 2023 diff hist +16 Controller reading code →DPCM Safety using OAM DMA: Clarifies that the three writes when an interrupt occurs are the stack writes.
12 November 2023
- 23:5023:50, 12 November 2023 diff hist +1 UNROM 512 Replaces "wram" with "RAM" to avoid confusion. WRAM often refers to non-persistent PRG-RAM, which this mapper doesn't natively support. current
11 November 2023
- 14:0914:09, 11 November 2023 diff hist +192 Game Genie →Bugs: Adds an example Game Genie code that relies on bus conflicts, as a test case for emulators.
2 November 2023
- 00:5500:55, 2 November 2023 diff hist −317 Color $0D games Cleans up some workarounds. Removes a patcher device suggestion: We should not be suggesting that people make or use hardware with the purpose of driving a 1 onto the bus so strongly that the 1 wins a bus conflict.
25 October 2023
- 10:1710:17, 25 October 2023 diff hist 0 m INES Mapper 101 →Bank Select ($6000-$7FFF): Formatting. current
13 October 2023
- 02:4202:42, 13 October 2023 diff hist +37 PPU variants Explicitly notes 2C05-99 grayscale has standard 2C02 behavior.
9 October 2023
- 09:5609:56, 9 October 2023 diff hist +1,135 PPU registers Updates the scroll section to make it clear that scroll must be written *after* PPUADDR and *with* PPUCTRL. Rewrites the palette read section for hopefully more detail and clarity, and to mention that not all PPUs support reading palettes.
- 04:1004:10, 9 October 2023 diff hist +3 Four player adapters Attempts to use the / prefix on joypad data lines when referring to signals that haven't yet been inverted. Cleans up the serial report formatting slightly.
- 03:5103:51, 9 October 2023 diff hist +1,157 Expansion port Rewrites and modernizes the Famicom EXP port signal descriptions. Adds a / prefix to joypad data lines to indicate inversion. Standardizes (for now) on OUTn formatting for joypad output bits. current
8 October 2023
- 20:3420:34, 8 October 2023 diff hist −78 2A03 Improves the opening line of the article. Removes unnecessary and incorrect 2A03/2A07 revision references. current
5 October 2023
- 01:5901:59, 5 October 2023 diff hist +321 2A03 Links to the PIT page now that it's not on the CPU test page anymore. Separates test mode and timer register ranges. Notes DMA register conflicts.
30 September 2023
- 00:3200:32, 30 September 2023 diff hist +5 m MMC5 pinout Adds back the missing † note indicator.
23 September 2023
- 07:4807:48, 23 September 2023 diff hist +1 PPU variants Test results suggest the RP2C04-0001 is probably a revision C PPU.
22 September 2023
- 06:3306:33, 22 September 2023 diff hist +33 CPU variants Adds new ceramic RP2A03 image.
- 06:3106:31, 22 September 2023 diff hist +16 PPU variants Adds new RP2C02 image.
- 06:3006:30, 22 September 2023 diff hist +31 N File:RP2C02 3F4 13.jpg From GuidoAnchovy current
- 06:2906:29, 22 September 2023 diff hist +31 N File:RP2A03 3G1 09.jpg From GuidoAnchovy current
- 00:2800:28, 22 September 2023 diff hist +427 INES Mapper 003 Updates Notes to better explain the bus conflict situation. Thanks to lidnariq and NewRisingSun for help hopefully getting this right. current
14 September 2023
- 02:3102:31, 14 September 2023 diff hist −26 Status flags →The B flag: Minor sentence changes for clarity. current
13 September 2023
- 02:4802:48, 13 September 2023 diff hist +73 Status flags Tries to add more clarity, particularly around the always-1 bit and B flag. Moves the table of contents to a more sensible place.
11 September 2023
- 21:3821:38, 11 September 2023 diff hist +200 FDS disk format Update date description with Heisei era, last 2 digits of current year, and Disk Writer information.
3 September 2023
- 11:2411:24, 3 September 2023 diff hist −21 DMA →Bugs: Adds new findings from dmc_dma_implicit_stop_level_test, which uses CPU test mode to sample the DMC level. The implicit-stop unexpected DMA is from the same address and is played.
22 August 2023
- 16:1716:17, 22 August 2023 diff hist +19 PPU variants Adds 2C05-99 PPU status ($2002) findings by forple from my 2002_open_bus_test_wip1 test.
19 August 2023
- 01:3601:36, 19 August 2023 diff hist +213 PPU variants Adds RC2C05-99 findings by forple from Micro Machines, Felix the Cat, palette_read_test, and oam_flicker_test.
11 August 2023
- 06:0806:08, 11 August 2023 diff hist +18 m Nintendo header Adds a References header. current
19 July 2023
- 22:0022:00, 19 July 2023 diff hist +833 CPU Test Mode Adds more 2A03G/H test pin information.
6 June 2023
- 20:2320:23, 6 June 2023 diff hist +184 PPU palettes →Palettes: Some formatting improvements.
17 May 2023
- 19:3219:32, 17 May 2023 diff hist +476 EXP pins Adds SFEAM expansion audio module.
16 May 2023
- 09:5809:58, 16 May 2023 diff hist −16 m INES Mapper 170 Removes bizarre mention that the game using this mapper is non-pornographic. current
2 May 2023
- 01:5001:50, 2 May 2023 diff hist −152 PPU sprite evaluation Removes a dead link that also isn't on archive.org. The creator of the linked content doesn't appear to be active anymore. current
25 April 2023
- 00:3700:37, 25 April 2023 diff hist −1 Programming UNROM Fixes and improves the example code comments.
23 April 2023
- 07:5307:53, 23 April 2023 diff hist −2 m NTSC video Replaces 'colour' with 'color' for consistency and searchability.
22 April 2023
- 23:3223:32, 22 April 2023 diff hist +1,156 Family Computer Network Adapter Adds a controller layout and a link to a page with images of the modem and controller. current
16 April 2023
- 23:0323:03, 16 April 2023 diff hist +1,582 CPU memory map More address space details and caveats. Clearer formatting.
13 April 2023
- 06:3506:35, 13 April 2023 diff hist −1 APU DMC →Concept: Changes 'sprite zero' to 'sprite 0' for consistency and thus searchability. Minor changes to wording for slightly better flow.
- 06:2906:29, 13 April 2023 diff hist +233 Glossary →S: Changes 'sprite zero' to 'sprite 0' for consistency and thus searchability. Improves the definition. current
- 06:2206:22, 13 April 2023 diff hist −6 PPU rendering →Cycles 1-256: Changes 'sprite zero' to 'sprite 0' for consistency and thus searchability.
- 06:2006:20, 13 April 2023 diff hist +4 PPU OAM Changes 'sprite zero' to 'sprite 0' for consistency and thus searchability.
31 March 2023
- 04:3804:38, 31 March 2023 diff hist −263 PPU registers →Note: Tokumaru's quad-write code is now hosted on the PPU scrolling page.
- 04:3704:37, 31 March 2023 diff hist +621 PPU scrolling Adds tokumaru's 2006/2005/2005/2006 code with teaching-oriented edits. Received permission from tokumaru to host this on the wiki as public domain.
26 March 2023
- 01:2501:25, 26 March 2023 diff hist +191 Tricky-to-emulate games Notes Arkista's Ring crash when using NESRGB or Hi-Def NES.
25 March 2023
- 03:1803:18, 25 March 2023 diff hist +26 PPU registers →OAM DMA ($4014) > write: Purging yet another use of even/odd CPU cycle terminology in favor of get/put.
22 March 2023
- 18:1018:10, 22 March 2023 diff hist 0 m Port test controller Fixes typo. current
- 13:5213:52, 22 March 2023 diff hist +2,095 N Port test controller Adds page documenting port test controller. Thanks to lidnariq for much of this information.
12 March 2023
- 11:1211:12, 12 March 2023 diff hist +4 m Expansion Port Sound Module →Caveat and workarounds: Link to DMA page.
- 11:0411:04, 12 March 2023 diff hist +12 m Expansion Port Sound Module →Caveat and workarounds: Clarifies we're talking about any write cycle, not write instruction or EPSM write.
7 March 2023
- 03:1203:12, 7 March 2023 diff hist +140 DMA →Bugs: UA6527P-based clones have different bug behavior because the sample ends 1 APU cycle later than official CPUs.
3 March 2023
- 02:2802:28, 3 March 2023 diff hist +13 DMA →Register conflicts: Notes newest findings regarding behavior on PAL. None of this matches what I expected and I no longer have a guess as to how PAL works.
2 March 2023
- 20:5920:59, 2 March 2023 diff hist +131 APU →Status ($4015): More details about open bus on bit 5.
- 10:0310:03, 2 March 2023 diff hist +252 APU →Status ($4015): Notes (lack of) impact of reads on open bus.
26 February 2023
- 08:3708:37, 26 February 2023 diff hist −42 NES 2.0 submappers →004: MMC3: More MMC3A/C renaming. current
- 02:2002:20, 26 February 2023 diff hist +6 NES 2.0 submappers →004: MMC3: Renames MMC3C submapper to Sharp MMC3 and MMC3A to NEC MMC3.
24 February 2023
- 16:5616:56, 24 February 2023 diff hist +98 MediaWiki:Loginprompt Makes the start of the prompt perhaps more attention-grabbing and obviously about registration. Adds forum and Discord links. current
23 February 2023
- 15:3215:32, 23 February 2023 diff hist +86 Talk:FDS disk format Forgot to add message signature. current
- 15:3215:32, 23 February 2023 diff hist +536 Talk:FDS disk format Disk version / price discussion.
- 00:4300:43, 23 February 2023 diff hist −861 FDS disk format Updates disk info block: Adds J 'Game type' (Nomura no Famicom Trade). Changes 'Price' to 'Disk version'. Marks field $18 as unknown (all $00's). Changes 'Disk type' to 'Disk type (FMC)', as this is 1 only for FMC blue disks (all but Risa no Yousei Densetsu). Adds 'Disk type (other)' field. Removes 'Price' section, which seems to have no backing.
19 February 2023
- 01:5201:52, 19 February 2023 diff hist +104 Emulator tests Adds a warning box about dead links and directs people to those tests on GitHub. We're still figuring out how to improve this page going forward.
15 February 2023
- 12:2812:28, 15 February 2023 diff hist +19 Cycle reference chart Updates PAL OAM write window to match newest findings. Exchanges 'even/odd' cycle terminology for 'get/put'.
- 12:1812:18, 15 February 2023 diff hist +236 PPU OAM →Dynamic RAM decay: org's analysis of PAL forced OAM refresh matches testing in Sour's thread: refresh begins on scanline 265.
13 February 2023
- 11:4611:46, 13 February 2023 diff hist +248 CPU variants Notes that DMC status bit is cleared 1 APU cycle late on UA6527P, TA-03NP1, (T)1818P, UM6561-2. Other clones untested.
- 11:1411:14, 13 February 2023 diff hist +167 PPU variants Notes that UA6561 emphasis is much stronger than normal. Notes that MC-P-502 die shot matches UA6538. Thanks to Eugene.S for this information.
- 08:4208:42, 13 February 2023 diff hist −11 NES 2.0 For CPU/PPU timing, the listed chip should be the UA6538 PPU, not the UA6527P CPU. Thanks to Eugene.S for identifying this.
- 04:4704:47, 13 February 2023 diff hist +287 Glossary Adds backdrop, palette RAM. Modifies CGRAM, CHR, CIC, CIRAM, CL, IRQ, PRG, SL, VRAM. Removes BFT.
11 February 2023
- 05:4005:40, 11 February 2023 diff hist +180 PPU variants Notes UM6561AF-2 bug. Thanks to Eugene for making me aware of it and that F and BF are unaffected.
- 05:2505:25, 11 February 2023 diff hist +358 CPU variants UM6561xx-2 updates. F is suspected to be the first revision. Eugene reports F has correct duties. Notes my findings regarding AF DMC and illegal instruction behavior.
7 February 2023
- 03:2603:26, 7 February 2023 diff hist +193 6502 assembly optimisations →BIT trick: Notes that you can also do this with the zero page version. Notes the caveat that this can trigger register read side-effects.
6 February 2023
- 12:3412:34, 6 February 2023 diff hist +527 Controller reading code Replaces even/odd cycle terminology with get/put. Adds more relevant caveats. Links to new DMA page.
- 03:4403:44, 6 February 2023 diff hist 0 Detect TV system Polling $2002, not $2001. current
3 February 2023
- 01:4601:46, 3 February 2023 diff hist +14 Sprite size Adds Zelda II to list of games using sprites as a right-side column disable. current
1 February 2023
- 03:5903:59, 1 February 2023 diff hist +22 m INES Mapper 003 Fixes nescartdb link.
30 January 2023
- 07:2807:28, 30 January 2023 diff hist +102 MK5060 pinout The Hong Kong Famicom actually uses a different chip. current
25 January 2023
- 00:3800:38, 25 January 2023 diff hist +22 Color $0D games Adds Castelian to the list.
23 January 2023
- 17:1717:17, 23 January 2023 diff hist −45 PPU palettes Removes link to the now-deleted Chinese version of the page, which was almost entirely English.
- 17:1717:17, 23 January 2023 diff hist −38 PPU OAM Removes link to the now-deleted Chinese version of the page, which was almost entirely English.