User contributions for Fiskbit

18 July 2024

• 20:4520:45, 18 July 2024 diff hist +3,960‎ PPU glitches ‎ Separates out the general explanation from the more hardware-oriented details. Adds detailed coverage of the two mitigations. Improves OAMADDR explanation.
• 04:5304:53, 18 July 2024 diff hist +90‎ CIC lockout chip ‎ →‎Pin 4 method: The do-nothing case seems to apply to *all* consumer CIC keys. Nobody can confirm the one person's claim that some CICs do reset the console in key mode. CIC key code seems to explicitly deassert the reset output during failure. current

27 June 2024

• 03:3003:30, 27 June 2024 diff hist +8‎ m Four player adapters ‎ Notes that simple adapters are passive. current
• 03:0503:05, 27 June 2024 diff hist +44‎ Arkanoid controller ‎ Repeated reads are a problem because conversions take too long, not the reads themselves. Also adds links to the shift register page. current

26 June 2024

• 21:4621:46, 26 June 2024 diff hist +3,813‎ Arkanoid controller ‎ Reworks this page to better organize the information, explain the conversion process, and clarify the controller layouts. Adds some new edge cases.

20 June 2024

• 02:5202:52, 20 June 2024 diff hist +519‎ Game bugs ‎ →‎General bugs: More information on Zelda scrolling bugs. Adds a significant caveat regarding the reference that it has major factual errors at the end.

11 June 2024

• 04:3704:37, 11 June 2024 diff hist +809‎ PPU registers ‎ Adds information on palette reads and that they don't work right on all consoles. Adds horizontal lines for formatting.

3 June 2024

• 08:0408:04, 3 June 2024 diff hist +91‎ m Status flags ‎ Adds short-name anchors for the flags.
• 03:2203:22, 3 June 2024 diff hist +175‎ Cycle counting ‎ Converts the "Instruction timings" examples into a table and adds a STA abs,X example. current
• 01:3301:33, 3 June 2024 diff hist −12‎ Cycle counting ‎ Converts the "Short delays" instruction list to a sortable table.

2 June 2024

• 12:3812:38, 2 June 2024 diff hist +12‎ m Cycle counting ‎ Changes Obelisk link to our mirror. (The original isn't coming back.)
• 12:3212:32, 2 June 2024 diff hist 0‎ Cycle counting ‎ →‎Short delays: Corrects NOP NOP NOP byte count. (Thanks to Gros chien for reporting.)
• 08:1308:13, 2 June 2024 diff hist 0‎ m Status flags ‎No edit summary
• 07:3007:30, 2 June 2024 diff hist +305‎ Status flags ‎ Clarifies some I flag points. Removes irrelevant I flag information from the B flag table. Removes unnecessary / prefixes from IRQ and NMI (we're talking about the interrupts, not the signals). Further explains B flag usage.

1 June 2024

• 09:3909:39, 1 June 2024 diff hist +54‎ Status flags ‎ Minor clarifications and additional detail.
• 08:4108:41, 1 June 2024 diff hist +146‎ Status flags ‎ →‎I: Interrupt Disable: Clarifies that this only inhibits IRQ interrupts. Notes that all types of interrupt (NMI and reset, not just IRQ) set I. Clarifies that the immediate handling of an IRQ after clearing I may have a 1 instruction delay for some causes.

27 May 2024

• 21:3321:33, 27 May 2024 diff hist −27‎ m FDS disk format ‎ Removes link to defunct 'price' field (now called 'disk version'). It's not clear how disk rewrite count would be related to disk version.

26 May 2024

• 14:3314:33, 26 May 2024 diff hist −20‎ PPU registers ‎ →‎Data ($2007) read/write: Removes a link to the "Reading 2007 during rendering" because this page is impenetrable to most the people who will be reading this. Cleans up the PPU scrolling link.
• 13:4413:44, 26 May 2024 diff hist 0‎ PPU scrolling ‎ Moves $2007 behavior up with the other registers, because it was easy to miss. Removes some weird indentation. Adds some horizontal lines to help break things up a bit. (This page needs some more involved improvements in the future.)

24 May 2024

• 05:2005:20, 24 May 2024 diff hist +876‎ PPU pinout ‎ Adds an RGB PPU pinout, makes the page fit the modern formatting a bit better, adds a little more detail. current

5 May 2024

• 02:0802:08, 5 May 2024 diff hist +28‎ m Standard controller ‎ →‎PAL: Fixes pinout link.

14 April 2024

• 21:3821:38, 14 April 2024 diff hist −1‎ m Family Computer Disk System ‎ was -> is (the FDS still exists today).

6 April 2024

• 07:5807:58, 6 April 2024 diff hist +156‎ Talk:NTSC video ‎ →‎Citation broken link: Notes that the link is now fixed. current
• 07:5507:55, 6 April 2024 diff hist +32‎ NTSC video ‎ Fixes "Understanding Analog Video Signals" tutorial link. (Maxim Integrated seems to now be at analog.com)

27 March 2024

• 21:5221:52, 27 March 2024 diff hist +14‎ FamicomBox ‎ →‎Hardware configurations: Adds the newly-discovered SSS-CPU-02 main board revision (using E/E-0 CPU/PPU). Differences compared to 04 are not yet known.

25 March 2024

• 08:2008:20, 25 March 2024 diff hist +2,807‎ EXP pins ‎ Adds Broke Studio boards. Makes a small change to the ATtiny13 programming description for clarity.

18 March 2024

• 21:0621:06, 18 March 2024 diff hist 0‎ 6502 assembly optimisations ‎ →‎Avoiding the need for CLC/SEC with ADC/SBC: If carry is clear, SBC should use value-1, not value+1. Thanks to Ooxie for reporting.
• 10:2510:25, 18 March 2024 diff hist +43‎ m CPU memory map ‎ Fixes two references to the now-removed "cartridge space". Clarifies that the vectors in the unmapped space are supplied by the cartridge.
• 09:1809:18, 18 March 2024 diff hist +147‎ CPU memory map ‎ Clarifies that the "cartridge space" is really unmapped space cartridges can use. Adds the extremely common cartridge RAM and ROM mapping to the table to avoid users thinking ROM starts at $4020.

17 March 2024

• 01:2601:26, 17 March 2024 diff hist +18‎ DMA ‎ →‎Register conflicts: Adds Twin Famicom and Famicom Titler to the list of consoles known to clock joypads per CPU cycle. current

15 March 2024

• 15:5915:59, 15 March 2024 diff hist −900‎ APU DMC ‎ Removes the list of DMC DMA cycle length cases; a similar list now lives in 'Controller reading code' where it's more comprehensive for the task at hand. While this list is convenient, it can be misleading and is not enough to implement DMA correctly.
• 15:5515:55, 15 March 2024 diff hist +319‎ DMA ‎ →‎References: Brings over references from the defunct APU DMC cycle count section.
• 15:5415:54, 15 March 2024 diff hist +773‎ Controller reading code ‎ Adds a cycle count table for various DMC DMA cases to the synced reads section. This is more relevant and less misleading here than on the APU DMC page.
• 15:0315:03, 15 March 2024 diff hist +237‎ DMA ‎ Adds more information to the summary table and rewords some points for clarity.

8 March 2024

• 16:2316:23, 8 March 2024 diff hist +3‎ m NES 2.0 ‎ →‎Default Expansion Device: Adds Famicom Network Controller link. Updates SNES mouse link to dedicated SNES mouse page.

5 March 2024

• 02:5902:59, 5 March 2024 diff hist +47‎ User:Fiskbit ‎ →‎Famicom (RF): Adds the newly-discovered HVC-CPU-02 board.

21 February 2024

• 01:4401:44, 21 February 2024 diff hist +1‎ m CCU v2.00 CF30288 pinout ‎ Typo. current

9 February 2024

• 07:1707:17, 9 February 2024 diff hist −399‎ Patents ‎ Fixes links, which were all dead.

3 February 2024

• 04:1404:14, 3 February 2024 diff hist −4‎ m Turbo File ‎ Grammar.

26 January 2024

• 16:3916:39, 26 January 2024 diff hist 0‎ m Color $0D games ‎ Replaces blown-out thumbnails with actual animated images. Slightly annoying, but less misleading / more useful.
• 06:0806:08, 26 January 2024 diff hist +113‎ m MMC1 ‎ Adds a reference to a forum thread about the MMC MULTI CHECKER-02 development board.

25 January 2024

• 14:3314:33, 25 January 2024 diff hist +8‎ m MMC1 ‎ →‎Reset: Wording.
• 11:4211:42, 25 January 2024 diff hist +331‎ MMC1 ‎ →‎Reset: Adds a note about why some games do reset writes to all 4 MMC1 registers.

20 January 2024

• 07:1107:11, 20 January 2024 diff hist −8‎ Input devices ‎ →‎Usage of port pins by hardware type: Removes read clock signal from controllers that likely don't actually use it. current
• 06:4506:45, 20 January 2024 diff hist +69‎ Famicom Network Controller ‎ Adds a controller image. Does some minor cleanup.
• 06:3806:38, 20 January 2024 diff hist +139‎ N File:Nintendo-Famicom-Modem-Controller.jpg ‎ The Famicom Network Controller, for use with Famicom Network System software. Image by Evan Amos current
• 05:2405:24, 20 January 2024 diff hist +2,699‎ Input devices ‎ Fixes content accidentally removed in previous edit.
• 05:2205:22, 20 January 2024 diff hist +2,374‎ Input devices ‎ Reworks the signal table to be better organized and easier to read. Adds more devices. Fixes the zapper audio signal.

19 January 2024

• 08:1608:16, 19 January 2024 diff hist +25‎ m Konami Hyper Shot ‎ Adds controllers category. current

18 January 2024

• 08:5708:57, 18 January 2024 diff hist +324‎ Family Computer Disk System ‎ Adds an infobox and FDS image.