Maple bus - Revision history

Tails86 at 13:58, 29 January 2026

2026-01-29T13:58:41Z

← Older revision		Revision as of 13:58, 29 January 2026
Line 19:		Line 19:
	=== Sense ===		=== Sense ===

	The Dreamcast does not rely on any sense line as some projects implement.<ref name="raphnet" /><ref>''[http://mc.pp.se/dc/controller.html] Dreamcast Programming - Controllers''</ref><ref>''[https://hackaday.com/2021/03/16/dreamcast-controller-adapter-even-works-with-mice/] Lewin Day \| DREAMCAST CONTROLLER ADAPTER EVEN WORKS WITH MICE''</ref> Both ground wires from the controller are tied to ground at the controller port module on the Dreamcast. To detect the presence of a device, Dreamcast instead sends a device info request every 50 Hz (PAL) or 60 Hz (NTSC) frame (every 20 or 16.6 ms) until a main peripheral responds on the bus.		The Dreamcast does not rely on any sense line as some projects implement.<ref name="raphnet" /><ref>''[http://mc.pp.se/dc/controller.html] Dreamcast Programming - Controllers''</ref><ref>''[https://hackaday.com/2021/03/16/dreamcast-controller-adapter-even-works-with-mice/] Lewin Day \| DREAMCAST CONTROLLER ADAPTER EVEN WORKS WITH MICE''</ref> Both ground wires from the controller are tied to ground at the controller port module on the Dreamcast. To detect the presence of a device, Dreamcast instead sends a device info request every 50 Hz (PAL) or 60 Hz (NTSC) frame (every 20 or 16.7 ms) until a main peripheral responds on the bus.

	== Maple Bus Signals ==		== Maple Bus Signals ==

Tails86 at 13:58, 29 January 2026

2026-01-29T13:58:14Z

← Older revision		Revision as of 13:58, 29 January 2026
Line 19:		Line 19:
	=== Sense ===		=== Sense ===

	The Dreamcast does not rely on any sense line as some projects implement.<ref name="raphnet" /><ref>''[http://mc.pp.se/dc/controller.html] Dreamcast Programming - Controllers''</ref><ref>''[https://hackaday.com/2021/03/16/dreamcast-controller-adapter-even-works-with-mice/] Lewin Day \| DREAMCAST CONTROLLER ADAPTER EVEN WORKS WITH MICE''</ref> Both ground wires from the controller are tied to ground at the controller port module on the Dreamcast. To detect the presence of a device, Dreamcast instead sends a device info request every 16 ms until a main peripheral responds on the bus.		The Dreamcast does not rely on any sense line as some projects implement.<ref name="raphnet" /><ref>''[http://mc.pp.se/dc/controller.html] Dreamcast Programming - Controllers''</ref><ref>''[https://hackaday.com/2021/03/16/dreamcast-controller-adapter-even-works-with-mice/] Lewin Day \| DREAMCAST CONTROLLER ADAPTER EVEN WORKS WITH MICE''</ref> Both ground wires from the controller are tied to ground at the controller port module on the Dreamcast. To detect the presence of a device, Dreamcast instead sends a device info request every 50 Hz (PAL) or 60 Hz (NTSC) frame (every 20 or 16.6 ms) until a main peripheral responds on the bus.

	== Maple Bus Signals ==		== Maple Bus Signals ==

Tails86 at 19:07, 6 December 2025

2025-12-06T19:07:16Z

← Older revision		Revision as of 19:07, 6 December 2025
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	\| 0x07 \|\| Acknowledge \|\| Device->Host \|\| 0 \|\| -		\| 0x07 \|\| Acknowledge \|\| Device->Host \|\| 0 \|\| -
	\|-		\|-
	\| 0x08 \|\| Data Transfer \|\| Device->Host \|\| [[Maple_bus#Data_Transfer_Payload_Structure_.28cmd_0x08.29\|3~~..256~~]] \|\| -		\| 0x08 \|\| Data Transfer \|\| Device->Host \|\| [[Maple_bus#Data_Transfer_Payload_Structure_.28cmd_0x08.29\|3 to 255]] \|\| -
	\|-		\|-
	\| 0x09 \|\| Get Condition \|\| Host->Device \|\| [[Maple_bus#Get_Condition_Payload_Structure_.28cmd_0x09.29\|1]] \|\| 0x08		\| 0x09 \|\| Get Condition \|\| Host->Device \|\| [[Maple_bus#Get_Condition_Payload_Structure_.28cmd_0x09.29\|1]] \|\| 0x08
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	\| 0x0B \|\| Block Read \|\| Host->Device \|\| [[Maple_bus#Block_Read_Payload_Structure_.28cmd_0x0B.29\|2]] \|\| 0x08		\| 0x0B \|\| Block Read \|\| Host->Device \|\| [[Maple_bus#Block_Read_Payload_Structure_.28cmd_0x0B.29\|2]] \|\| 0x08
	\|-		\|-
	\| 0x0C \|\| Block Write \|\| Host->Device \|\| [[Maple_bus#Block_Write_Payload_Structure_.28cmd_0x0C.29\|3~~..256~~]] \|\| 0x07		\| 0x0C \|\| Block Write \|\| Host->Device \|\| [[Maple_bus#Block_Write_Payload_Structure_.28cmd_0x0C.29\|3 to 255]] \|\| 0x07
	\|-		\|-
	\| 0x0D \|\| Get Last Error \|\| Host->Device \|\| [[Maple_bus#Get_Last_Error_Payload_Structure_.28cmd_0x0D.29\|2]] \|\| 0x07		\| 0x0D \|\| Get Last Error \|\| Host->Device \|\| [[Maple_bus#Get_Last_Error_Payload_Structure_.28cmd_0x0D.29\|2]] \|\| 0x07
	\|-		\|-
	\| 0x0E \|\| Set Condition \|\| Host->Device \|\| [[Maple_bus#Set_Condition_Payload_Structure_.28cmd_0x0E.29\|2~~..256~~]] \|\| 0x07		\| 0x0E \|\| Set Condition \|\| Host->Device \|\| [[Maple_bus#Set_Condition_Payload_Structure_.28cmd_0x0E.29\|2 to 255]] \|\| 0x07
	\|-		\|-
	\| 0xF9 \|\| AR Error \|\| Device->Host \|\| 0 \|\| -		\| 0xF9 \|\| AR Error \|\| Device->Host \|\| 0 \|\| -
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	{\| class="wikitable"		{\| class="wikitable"
	\|-		\|-
	! Word 0 !! Word 1 !! Words 2..~~255~~		! Word 0 !! Word 1 !! Words 2..254
	\|-		\|-
	\| [[Maple_bus#Function_Codes\|Function code]] \|\| [[Maple_bus#Location_Word\|Location word]] \|\| Data - device dependent structure		\| [[Maple_bus#Function_Codes\|Function code]] \|\| [[Maple_bus#Location_Word\|Location word]] \|\| Data - device dependent structure
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	{\| class="wikitable"		{\| class="wikitable"
	\|-		\|-
	! Word 0 !! Word 1 !! Words 2..~~255~~		! Word 0 !! Word 1 !! Words 2..254
	\|-		\|-
	\| [[Maple_bus#Function_Codes\|Function code]] \|\| [[Maple_bus#Location_Word\|Location word]] \|\| Data - device dependent structure		\| [[Maple_bus#Function_Codes\|Function code]] \|\| [[Maple_bus#Location_Word\|Location word]] \|\| Data - device dependent structure
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	{\| class="wikitable"		{\| class="wikitable"
	\|-		\|-
	! Word 0 !! Words 1..~~255~~		! Word 0 !! Words 1..254
	\|-		\|-
	\| [[Maple_bus#Function_Codes\|Function code]] \|\| Condition - device dependent structure		\| [[Maple_bus#Function_Codes\|Function code]] \|\| Condition - device dependent structure

Tails86: /* Non-OEM Commands */

2025-12-06T19:05:13Z

Non-OEM Commands

← Older revision		Revision as of 19:05, 6 December 2025
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	! Command Value !! Description !! Communication Direction !! Number of Payload Words !! Expected Response**		! Command Value !! Description !! Communication Direction !! Number of Payload Words !! Expected Response**
	\|-		\|-
	\| 0x21 \|\| Game ID \|\| Host->Device \|\| [[Maple_bus#Game_ID_Payload_Structure_.28cmd_0x21.29\|4..36]] \|\| 0x07		\| 0x21 \|\| Game ID \|\| Host->Device \|\| [[Maple_bus#Game_ID_Payload_Structure_.28cmd_0x21.29\|4 or 36]] \|\| 0x07
	\|}		\|}

Tails86: /* Game ID Payload Structure (cmd 0x21) */

2025-12-06T17:50:51Z

Game ID Payload Structure (cmd 0x21)

← Older revision		Revision as of 17:50, 6 December 2025
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	{\| class="wikitable"		{\| class="wikitable"
	\|-		\|-
	! Word 0 !! Words 1-3 !! Words 4-36 (optional)		! Word 0 !! Words 1-3 !! Words 4-35 (optional)
	\|-		\|-
	\| [[Maple_bus#Function_Codes\|Function code]] \|\| Game ID bytes \|\| Game Name String		\| [[Maple_bus#Function_Codes\|Function code]] \|\| Game ID bytes \|\| Game Name String

Tails86 at 17:49, 6 December 2025

2025-12-06T17:49:35Z

Tails86: /* Game ID Payload Structure (cmd 0x21) */

2025-12-06T17:40:26Z

Game ID Payload Structure (cmd 0x21)

← Older revision		Revision as of 17:40, 6 December 2025
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	! Word 0 !! Words 1..3 !! Words 4..36		! Word 0 !! Words 1..3 !! Words 4..36
	\|-		\|-
	\| [[Maple_bus#Function_Codes\|Function code]] \|\| Game ID bytes \|\| Game Name String		\| [[Maple_bus#Function_Codes\|Function code]] \|\| Game ID bytes \|\| Game Name String (optional)
	\|}		\|}

Tails86 at 17:31, 6 December 2025

2025-12-06T17:31:25Z

← Older revision		Revision as of 17:31, 6 December 2025
Line 202:		Line 202:
	\| 0x21 \|\| Game ID \|\| Host->Device \|\| [[Maple_bus#Game_ID_Payload_Structure_.28cmd_0x21.29\|4..36]] \|\| 0x07		\| 0x21 \|\| Game ID \|\| Host->Device \|\| [[Maple_bus#Game_ID_Payload_Structure_.28cmd_0x21.29\|4..36]] \|\| 0x07
	\|}		\|}

			<nowiki>**</nowiki>This is the expected response when device didn't experience an error

	==== Payload ====		==== Payload ====

Tails86: Added VM2/WMUPro Game ID command

2025-12-06T17:28:42Z

Added VM2/WMUPro Game ID command

@@ Line 191: / Line 191: @@
 <nowiki>**</nowiki>This is the expected response when device didn't experience an error
 ==== Payload ====
@@ Line 293: / Line 304: @@
 |-
 | [[Maple_bus#Function_Codes|Function code]] || Condition - device dependent structure
 |}

Tails86 at 01:43, 6 December 2025

2025-12-06T01:43:29Z

← Older revision		Revision as of 01:43, 6 December 2025
Line 202:		Line 202:
	! Word 0 !! Words 1-3 !! Word 4 !! Words 5-11 !! Words 12-26 !! Word 27		! Word 0 !! Words 1-3 !! Word 4 !! Words 5-11 !! Words 12-26 !! Word 27
	\|-		\|-
	\| Supported [[Maple_bus#Function_Codes\|function codes]] mask* \|\| Function definitions for up to 3 devices \|\| Byte ~~3 (MSB)~~: Region code <br> Byte 2: Connection direction code <br> Bytes 1 and 0: first two characters of description ASCII string* \|\| The rest of the description ASCII string* \|\| Producer information ASCII string* \|\| 2 most significant bytes: standby current consumption <br> 2 least significant bytes: maximum current consumption****		\| Supported [[Maple_bus#Function_Codes\|function codes]] mask* \|\| Function definitions for up to 3 devices \|\| Byte 0: Region code <br> Byte 1: Connection direction code <br> Bytes 2 and 3: first two characters of description ASCII string* \|\| The rest of the description ASCII string* \|\| Producer information ASCII string* \|\| 2 most significant bytes: standby current consumption <br> 2 least significant bytes: maximum current consumption****
	\|}		\|}

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	! Word 0 !! Words 1-3 !! Word 4 !! Words 5-11 !! Words 12-26 !! Word 27 !! Words 28-47		! Word 0 !! Words 1-3 !! Word 4 !! Words 5-11 !! Words 12-26 !! Word 27 !! Words 28-47
	\|-		\|-
	\| Supported [[Maple_bus#Function_Codes\|function codes]] mask* \|\| Function definitions for up to 3 devices \|\| Byte ~~3 (MSB)~~: Region code <br> Byte 2: Connection direction code <br> Bytes 1 and 0: first two characters of description ASCII string* \|\| The rest of the description ASCII string* \|\| Producer information ASCII string* \|\| 2 most significant bytes: standby current consumption <br> 2 least significant bytes: maximum current consumption** \|\| Version information and/or capabilities ASCII string*		\| Supported [[Maple_bus#Function_Codes\|function codes]] mask* \|\| Function definitions for up to 3 devices \|\| Byte 0: Region code <br> Byte 1: Connection direction code <br> Bytes 2 and 3: first two characters of description ASCII string* \|\| The rest of the description ASCII string* \|\| Producer information ASCII string* \|\| 2 most significant bytes: standby current consumption <br> 2 least significant bytes: maximum current consumption** \|\| Version information and/or capabilities ASCII string*
	\|}		\|}

← Older revision		Revision as of 17:49, 6 December 2025
Line 161:		Line 161:
	\| 0x07 \|\| Acknowledge \|\| Device->Host \|\| 0 \|\| -		\| 0x07 \|\| Acknowledge \|\| Device->Host \|\| 0 \|\| -
	\|-		\|-
	\| 0x08 \|\| Data Transfer \|\| Device->Host \|\| [[Maple_bus#Data_Transfer_Payload_Structure_.28cmd_0x08.29\|3..~~255~~]] \|\| -		\| 0x08 \|\| Data Transfer \|\| Device->Host \|\| [[Maple_bus#Data_Transfer_Payload_Structure_.28cmd_0x08.29\|3..256]] \|\| -
	\|-		\|-
	\| 0x09 \|\| Get Condition \|\| Host->Device \|\| [[Maple_bus#Get_Condition_Payload_Structure_.28cmd_0x09.29\|1]] \|\| 0x08		\| 0x09 \|\| Get Condition \|\| Host->Device \|\| [[Maple_bus#Get_Condition_Payload_Structure_.28cmd_0x09.29\|1]] \|\| 0x08
Line 169:		Line 169:
	\| 0x0B \|\| Block Read \|\| Host->Device \|\| [[Maple_bus#Block_Read_Payload_Structure_.28cmd_0x0B.29\|2]] \|\| 0x08		\| 0x0B \|\| Block Read \|\| Host->Device \|\| [[Maple_bus#Block_Read_Payload_Structure_.28cmd_0x0B.29\|2]] \|\| 0x08
	\|-		\|-
	\| 0x0C \|\| Block Write \|\| Host->Device \|\| [[Maple_bus#Block_Write_Payload_Structure_.28cmd_0x0C.29\|3..~~255~~]] \|\| 0x07		\| 0x0C \|\| Block Write \|\| Host->Device \|\| [[Maple_bus#Block_Write_Payload_Structure_.28cmd_0x0C.29\|3..256]] \|\| 0x07
	\|-		\|-
	\| 0x0D \|\| Get Last Error \|\| Host->Device \|\| [[Maple_bus#Get_Last_Error_Payload_Structure_.28cmd_0x0D.29\|2]] \|\| 0x07		\| 0x0D \|\| Get Last Error \|\| Host->Device \|\| [[Maple_bus#Get_Last_Error_Payload_Structure_.28cmd_0x0D.29\|2]] \|\| 0x07
	\|-		\|-
	\| 0x0E \|\| Set Condition \|\| Host->Device \|\| [[Maple_bus#Set_Condition_Payload_Structure_.28cmd_0x0E.29\|2..~~255~~]] \|\| 0x07		\| 0x0E \|\| Set Condition \|\| Host->Device \|\| [[Maple_bus#Set_Condition_Payload_Structure_.28cmd_0x0E.29\|2..256]] \|\| 0x07
	\|-		\|-
	\| 0xF9 \|\| AR Error \|\| Device->Host \|\| 0 \|\| -		\| 0xF9 \|\| AR Error \|\| Device->Host \|\| 0 \|\| -
Line 312:		Line 312:
	{\| class="wikitable"		{\| class="wikitable"
	\|-		\|-
	! Word 0 !! Words 1..3 !! Words 4..36		! Word 0 !! Words 1-3 !! Words 4-36 (optional)
	\|-		\|-
	\| [[Maple_bus#Function_Codes\|Function code]] \|\| Game ID bytes \|\| Game Name String ~~(optional)~~		\| [[Maple_bus#Function_Codes\|Function code]] \|\| Game ID bytes \|\| Game Name String
	\|}		\|}