Use the SNES/NES controllers - Revision history

WF: /* Button table */

2026-02-03T05:37:18Z

Button table

← Older revision		Revision as of 01:37, 3 February 2026
Line 146:		Line 146:

	=== Button table ===		=== Button table ===
	~~'''NOTE:''' Buttons are active low! Bits are 1 when unpressed, 0 when pressed.~~
	{\| class="wikitable"		{\| class="wikitable"
	\|+		\|+
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	\|R		\|R
	\|}		\|}
	~~Note~~: L refers to the left shoulder button and R refers to the right shoulder button.		Notes:

			* L refers to the left shoulder button and R refers to the right shoulder button.
			* Buttons are active low! Bits are 1 when unpressed, 0 when pressed.

	=== Usage ===		=== Usage ===

WF: /* Button table */

2026-02-03T05:36:15Z

Button table

← Older revision		Revision as of 01:36, 3 February 2026
Line 146:		Line 146:

	=== Button table ===		=== Button table ===
			'''NOTE:''' Buttons are active low! Bits are 1 when unpressed, 0 when pressed.
	{\| class="wikitable"		{\| class="wikitable"
	\|+		\|+

1BitFeverDreams: link to troubleshooting

2026-02-01T20:24:43Z

link to troubleshooting

← Older revision		Revision as of 16:24, 1 February 2026
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	Super famicom gamepads work very well as substitute for regular SNES gamepads.		Super famicom gamepads work very well as substitute for regular SNES gamepads.

			If your FNX4N4S adapter box is not working reliably, go check how to resolve a potential issue in the [[Troubleshooting\|Troubleshoot]] page.
	[[File:Full complement of gamepads.png\|thumb\|A fully populated FNX4N4S for the F256K2]]		[[File:Full complement of gamepads.png\|thumb\|A fully populated FNX4N4S for the F256K2]]

1BitFeverDreams: removed link to purchase FNX4N4S, since it no longer works.

2026-02-01T20:02:00Z

removed link to purchase FNX4N4S, since it no longer works.

← Older revision		Revision as of 16:02, 1 February 2026
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	== NES and SNES controllers ==		== NES and SNES controllers ==
	The F256 machines can use these controllers provided they are equipped with an optional ~~[https://c256foenix.com/product/fnx4n4s/?v=5435c69ed3bc~~ FNX4N4S breakout adapter].		The F256 machines can use these controllers provided they are equipped with an optional FNX4N4S breakout adapter (website purchase link no longer active).

	The official gamepads of yesteryear work without issue with this and are plentiful in the used market.		The official gamepads of yesteryear work without issue with this and are plentiful in the used market.

1BitFeverDreams: /* Usage */ fixed the NES example code externally linked and added the 2x core delays when triggering in the text examples on this wiki page

2026-01-13T19:50:23Z

Usage: fixed the NES example code externally linked and added the 2x core delays when triggering in the text examples on this wiki page

← Older revision		Revision as of 15:50, 13 January 2026
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	<pre>		<pre>
	POKE(PAD_CTRL, 0b10000001); //trigger, nes mode, enabled		POKE(PAD_CTRL, 0b10000001); //trigger, nes mode, enabled
			ASM("NOP"); //a necessary delay with the 2x speed core
			ASM("NOP"); //a necessary delay with the 2x speed core
	POKE(PAD_CTRL, 0b00000001); //clear trigger		POKE(PAD_CTRL, 0b00000001); //clear trigger
	while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared		while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared
Line 332:		Line 334:
	<pre>		<pre>
	POKE(PAD_CTRL, 0b10000101); //trigger, snes mode, enabled		POKE(PAD_CTRL, 0b10000101); //trigger, snes mode, enabled
			ASM("NOP"); //a necessary delay with the 2x speed core
			ASM("NOP"); //a necessary delay with the 2x speed core
	POKE(PAD_CTRL, 0b00000101); //clear trigger		POKE(PAD_CTRL, 0b00000101); //clear trigger
	while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared		while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared
Line 343:		Line 347:
	//NES section		//NES section
	POKE(PAD_CTRL, 0b10000001); //trigger, nes mode, enabled		POKE(PAD_CTRL, 0b10000001); //trigger, nes mode, enabled
			ASM("NOP"); //a necessary delay with the 2x speed core
			ASM("NOP"); //a necessary delay with the 2x speed core
	POKE(PAD_CTRL, 0b00000001); //clear trigger		POKE(PAD_CTRL, 0b00000001); //clear trigger
	while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared		while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared
Line 351:		Line 357:
	//SNES section		//SNES section
	POKE(PAD_CTRL, 0b10000101); //trigger, snes mode, enabled		POKE(PAD_CTRL, 0b10000101); //trigger, snes mode, enabled
			ASM("NOP"); //a necessary delay with the 2x speed core
			ASM("NOP"); //a necessary delay with the 2x speed core
	POKE(PAD_CTRL, 0b00000101); //clear trigger		POKE(PAD_CTRL, 0b00000101); //clear trigger
	while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared		while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared

1BitFeverDreams at 16:46, 12 March 2025

2025-03-12T16:46:45Z

← Older revision		Revision as of 12:46, 12 March 2025
Line 7:		Line 7:

	Super famicom gamepads work very well as substitute for regular SNES gamepads.		Super famicom gamepads work very well as substitute for regular SNES gamepads.
			[[File:Full complement of gamepads.png\|thumb\|A fully populated FNX4N4S for the F256K2]]

	=== Registers ===		=== Registers ===

1BitFeverDreams at 14:16, 12 March 2025

2025-03-12T14:16:47Z

← Older revision		Revision as of 10:16, 12 March 2025
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	//section where reactions are made to the various SNES presses		//section where reactions are made to the various SNES presses
	</pre>		</pre>

			=== Source code example in C: ===
			Check out this simple example displaying the statuses of all 4 NES pads on screen, using hex: https://github.com/Mu0n/F256KsimpleCdoodles/tree/main/NES/src

1BitFeverDreams: the trigger can be cleared right away

2025-03-12T13:58:48Z

the trigger can be cleared right away

← Older revision		Revision as of 09:58, 12 March 2025
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	<pre>		<pre>
	POKE(PAD_CTRL, 0b10000001); //trigger, nes mode, enabled		POKE(PAD_CTRL, 0b10000001); //trigger, nes mode, enabled
			POKE(PAD_CTRL, 0b00000001); //clear trigger
	while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared		while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared
	;		;
	if((PEEK(PAD0) & 0x80) == 0) reactToAPressed();		if((PEEK(PAD0) & 0x80) == 0) reactToAPressed();
	~~POKE(PAD_CTRL, 0b00000001); //clear trigger~~
	</pre>		</pre>

Line 331:		Line 331:
	<pre>		<pre>
	POKE(PAD_CTRL, 0b10000101); //trigger, snes mode, enabled		POKE(PAD_CTRL, 0b10000101); //trigger, snes mode, enabled
			POKE(PAD_CTRL, 0b00000101); //clear trigger
	while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared		while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared
	;		;
	if((PEEK(PAD2_S) & 0x04) == 0) reactToXPressed();		if((PEEK(PAD2_S) & 0x04) == 0) reactToXPressed();
	~~POKE(PAD_CTRL, 0b00000101); //clear trigger~~
	</pre>		</pre>

Line 342:		Line 342:
	//NES section		//NES section
	POKE(PAD_CTRL, 0b10000001); //trigger, nes mode, enabled		POKE(PAD_CTRL, 0b10000001); //trigger, nes mode, enabled
			POKE(PAD_CTRL, 0b00000001); //clear trigger
	while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared		while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared
	;		;
	//section where reactions are made to the various NES presses		//section where reactions are made to the various NES presses
	~~POKE(PAD_CTRL, 0b00000001); //clear trigger~~


	//SNES section		//SNES section
	POKE(PAD_CTRL, 0b10000101); //trigger, snes mode, enabled		POKE(PAD_CTRL, 0b10000101); //trigger, snes mode, enabled
			POKE(PAD_CTRL, 0b00000101); //clear trigger
	while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared		while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared
	;		;
	//section where reactions are made to the various SNES presses		//section where reactions are made to the various SNES presses
	~~POKE(PAD_CTRL, 0b00000101); //clear trigger~~
	</pre>		</pre>

1BitFeverDreams at 13:46, 12 March 2025

2025-03-12T13:46:32Z

← Older revision		Revision as of 09:46, 12 March 2025
Line 347:		Line 347:
	POKE(PAD_CTRL, 0b00000001); //clear trigger		POKE(PAD_CTRL, 0b00000001); //clear trigger


			//SNES section
	POKE(PAD_CTRL, 0b10000101); //trigger, snes mode, enabled		POKE(PAD_CTRL, 0b10000101); //trigger, snes mode, enabled
	while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared		while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared

1BitFeverDreams at 13:22, 12 March 2025

2025-03-12T13:22:55Z

← Older revision		Revision as of 09:22, 12 March 2025
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	=== Usage ===		=== Usage ===
	Example 1: polling a NES controller in PAD0 position and checking if A is pressed:<pre>		Example 1: polling a NES controller in PAD0 position and checking if A is pressed:

			<pre>
	POKE(PAD_CTRL, 0b10000001); //trigger, nes mode, enabled		POKE(PAD_CTRL, 0b10000001); //trigger, nes mode, enabled
	while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared		while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared
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	if((PEEK(PAD0) & 0x80) == 0) reactToAPressed();		if((PEEK(PAD0) & 0x80) == 0) reactToAPressed();
	POKE(PAD_CTRL, 0b00000001); //clear trigger		POKE(PAD_CTRL, 0b00000001); //clear trigger
	</pre>Example 2: polling a SNES controller in PAD2 position and checking if X is pressed:<pre>		</pre>

			Example 2: polling a SNES controller in PAD2 position and checking if X is pressed:

			<pre>
	POKE(PAD_CTRL, 0b10000101); //trigger, snes mode, enabled		POKE(PAD_CTRL, 0b10000101); //trigger, snes mode, enabled
	while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared		while((PEEK(PAD_STAT) & 0x40) == 0) //loop while this bit is cleared
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	if((PEEK(PAD2_S) & 0x04) == 0) reactToXPressed();		if((PEEK(PAD2_S) & 0x04) == 0) reactToXPressed();
	POKE(PAD_CTRL, 0b00000101); //clear trigger		POKE(PAD_CTRL, 0b00000101); //clear trigger
	</pre>Example 3: polling both types of controller in rapid succession (allows the usage of all 8 controllers!)<pre>		</pre>

			Example 3: polling both types of controller in rapid succession (allows the usage of all 8 controllers!)

			<pre>
	//NES section		//NES section
	POKE(PAD_CTRL, 0b10000001); //trigger, nes mode, enabled		POKE(PAD_CTRL, 0b10000001); //trigger, nes mode, enabled