Family Computer Disk System: Revision history

29 March 2025

• curprev 03:2203:22, 29 March 2025‎ TakuikaNinja talk contribs‎ 13,467 bytes +109‎ Add product codes, and reference the official Nintendo JP page on the FDS.

19 March 2025

• curprev 05:2005:20, 19 March 2025‎ TakuikaNinja talk contribs‎ 13,358 bytes +177‎ →‎See Also: Add FDS-Mirroring-Test.

18 March 2025

• curprev 07:0907:09, 18 March 2025‎ TakuikaNinja talk contribs‎ 13,181 bytes +1,298‎ Elaborate on the Quick Disk medium, including the protections added to FDS drives.
• curprev 06:1706:17, 18 March 2025‎ TakuikaNinja talk contribs‎ 11,883 bytes +98‎ Link to FDS expansion port pinout.

14 March 2025

• curprev 01:4301:43, 14 March 2025‎ TakuikaNinja talk contribs‎ 11,785 bytes +132‎ Add link to FDS IRQ tests.

11 March 2025

• curprev 02:5002:50, 11 March 2025‎ TakuikaNinja talk contribs‎ 11,653 bytes +17‎ →‎FDS Control ($4025): The external connector is being affected by bit 5, which is likely why it appears in $4033.
• curprev 02:4702:47, 11 March 2025‎ TakuikaNinja talk contribs‎ 11,636 bytes +133‎ →‎External connector ($4026): Add TODO regarding $4025.d5's effect on bits 1 and 2.
• curprev 02:3902:39, 11 March 2025‎ TakuikaNinja talk contribs‎ 11,503 bytes +227‎ →‎FDS Control ($4025): Add note regarding bit 5. Its purpose is still unknown.
• curprev 02:0702:07, 11 March 2025‎ TakuikaNinja talk contribs‎ 11,276 bytes +50‎ →‎Disk Status register ($4030): Bit 3 appears to be the nametable arrangement bit from $4025.d3.

23 February 2025

• curprev 03:3503:35, 23 February 2025‎ TakuikaNinja talk contribs‎ 11,226 bytes +130‎ Point to CRC section of the disk format. Also clarify the note regarding on-the-fly nametable arrangement switches.

21 January 2025

• curprev 01:3601:36, 21 January 2025‎ TakuikaNinja talk contribs‎ 11,096 bytes 0‎ Use newer domain for Enri's Famicom Disk System page.

19 January 2025

• curprev 05:1605:16, 19 January 2025‎ TakuikaNinja talk contribs‎ 11,096 bytes +85‎ Confirm $4025 motor control & transfer reset bits based on hardware testing. Also switch to nametable arrangement terminology.

18 August 2024

• curprev 02:1202:12, 18 August 2024‎ TakuikaNinja talk contribs‎ 11,011 bytes +312‎ Move ccovell's tools to "See Also", link asm6f example, and add extra info to the FDS & BIOS summaries.

10 May 2024

• curprev 05:2005:20, 10 May 2024‎ TakuikaNinja talk contribs‎ 10,699 bytes +334‎ Explain the ready and protect flags. ($4032.d1~d2)

20 April 2024

• curprev 07:5107:51, 20 April 2024‎ TakuikaNinja talk contribs‎ 10,365 bytes +87‎ Link to the TNES format, which has FDS support.
• curprev 07:5007:50, 20 April 2024‎ TakuikaNinja talk contribs‎ 10,278 bytes +98‎ Update $4025 based on new analysis of register write logs and disassembled BIOS code.

14 April 2024

• curprev 21:3821:38, 14 April 2024‎ Fiskbit talk contribs‎ m 10,180 bytes −1‎ was -> is (the FDS still exists today).
• curprev 15:2915:29, 14 April 2024‎ Zeta0134 talk contribs‎ 10,181 bytes +129‎ For consistency with other "mapper" pages, add a short Banks section describing the RAM Adapter's memory layout

18 January 2024

• curprev 08:5708:57, 18 January 2024‎ Fiskbit talk contribs‎ 10,052 bytes +324‎ Adds an infobox and FDS image.

9 November 2023

• curprev 22:0222:02, 9 November 2023‎ Lidnariq talk contribs‎ m 9,728 bytes −7‎ →‎References: enri's website moved
• curprev 16:3916:39, 9 November 2023‎ TakuikaNinja talk contribs‎ 9,735 bytes +27‎ Begin the corrections and additions which should have been done ages ago.

7 March 2023

• curprev 20:0720:07, 7 March 2023‎ Egor talk contribs‎ 9,708 bytes +267‎ spell out when disk IRQs get acknowledged (according to FCEUX and Mesen). also make it clear when we're talking about the timer IRQ specifically.

6 June 2021

• curprev 03:5003:50, 6 June 2021‎ Rainwarrior talk contribs‎ 9,441 bytes +186‎ →‎References: ccovell wrote 2 tools with similar (and sometimes switched) names, linking both
• curprev 03:4503:45, 6 June 2021‎ Rainwarrior talk contribs‎ 9,255 bytes +17‎ →‎References: link to updated version of FDS lister (this old one doesn't run on modern Windows)

3 December 2020

• curprev 15:0115:01, 3 December 2020‎ Quietust talk contribs‎ 9,238 bytes +101‎ →‎Hardware: Clean this up a bit

2 December 2020

• curprev 16:5016:50, 2 December 2020‎ Cluster talk contribs‎ 9,137 bytes +91‎ Notice about battery bit
• curprev 12:3512:35, 2 December 2020‎ Cluster talk contribs‎ m 9,046 bytes +2‎ →‎Disk drive status register ($4032) - typo fix
• curprev 12:2612:26, 2 December 2020‎ Cluster talk contribs‎ 9,044 bytes 0‎ Bit 7 fix
• curprev 09:2309:23, 2 December 2020‎ Cluster talk contribs‎ m 9,044 bytes −1‎ Minor design fix

21 April 2019

• curprev 03:1603:16, 21 April 2019‎ Rainwarrior talk contribs‎ 9,045 bytes +50‎ moving mapper 20 mention out of lead, linking it in see also

8 April 2019

• curprev 00:0800:08, 8 April 2019‎ Lidnariq talk contribs‎ m 8,995 bytes +20‎ →‎See Also: another pinout

4 April 2019

• curprev 22:5022:50, 4 April 2019‎ Rainwarrior talk contribs‎ m 8,975 bytes +4‎ →‎Overview: link BIOS
• curprev 22:2822:28, 4 April 2019‎ Rainwarrior talk contribs‎ 8,971 bytes +13‎ →‎See Also: the example has moved
• curprev 22:1822:18, 4 April 2019‎ Rainwarrior talk contribs‎ m 8,958 bytes +7‎ →‎Disks: .FDS
• curprev 22:1722:17, 4 April 2019‎ Rainwarrior talk contribs‎ 8,951 bytes 0‎ →‎References: should probably move Brad Taylor's reference to the top of this list (definitely the most useful here)
• curprev 22:1622:16, 4 April 2019‎ Rainwarrior talk contribs‎ m 8,951 bytes 0‎ →‎BIOS: fix link
• curprev 22:1422:14, 4 April 2019‎ Rainwarrior talk contribs‎ 8,951 bytes −24,692‎ splitting FDS BIOS
• curprev 22:0722:07, 4 April 2019‎ Rainwarrior talk contribs‎ 33,643 bytes +206‎ →‎Hardware: making a subsection for Disks to make it discoverable in the TOC
• curprev 21:5221:52, 4 April 2019‎ Rainwarrior talk contribs‎ 33,437 bytes −10,958‎ split disk format information to FDS disk format
• curprev 21:4721:47, 4 April 2019‎ Rainwarrior talk contribs‎ 44,395 bytes +189‎ →‎Hardware: restoring information from that split that was actually about the disk format and not .FDS
• curprev 21:4421:44, 4 April 2019‎ Rainwarrior talk contribs‎ 44,206 bytes −1,751‎ splitting FDS file format

12 August 2018

• curprev 05:1705:17, 12 August 2018‎ Great Hierophant talk contribs‎ 45,957 bytes 0‎ →‎Disk info block (block 1)

26 October 2017

• curprev 01:3701:37, 26 October 2017‎ Rainwarrior talk contribs‎ m 45,957 bytes −10‎ →‎See Also: forgot about the convention of omitting http:
• curprev 01:3701:37, 26 October 2017‎ Rainwarrior talk contribs‎ 45,967 bytes +204‎ →‎See Also: these two forum posts of mine are probably useful reference?

23 September 2017

• curprev 22:2522:25, 23 September 2017‎ Rainwarrior talk contribs‎ 45,763 bytes +88‎ →‎References: linking recent thread of useful information
• curprev 14:4214:42, 23 September 2017‎ Sour talk contribs‎ 45,675 bytes +1,332‎ Added IRQ-related information to register documentation
• curprev 03:4903:49, 23 September 2017‎ Rainwarrior talk contribs‎ 44,343 bytes 0‎ →‎FDS Control ($4025): this appears to be "arrangement" instead of "mirroring" terminology

22 September 2017

• curprev 06:1706:17, 22 September 2017‎ Rainwarrior talk contribs‎ 44,343 bytes +68‎ →‎See Also: creating section to collect strongly related articles
• curprev 04:3604:36, 22 September 2017‎ Lidnariq talk contribs‎ m 44,275 bytes +33‎ link to cable pinout page

12 August 2017

• curprev 17:4217:42, 12 August 2017‎ NewRisingSun talk contribs‎ 44,242 bytes +168‎ Added hexadecimal offsets to Disk info block table