■3.3 Support peripheral data format

Here are the data formats for SMPC supported peripherals in SMPC control mode .
Please refer to each peripheral's manual for detailed data on each peripheral.

• mega drive 3 button pad
• mega drive 6 button pad
• shuttle mouse
• sega tap
• Sega Saturn standard pad
• mission stick
• sega saturn keyboard
• Multi terminal 6
• multi controller
• twin stick
• racing controller

◆Mega Drive 3 button pad

Table 3.14 shows the data format of the Mega Drive 3 button pad in SMPC control mode.

Table 3.14 Mega Drive 3 Button Pad Data Format

SMPC control code	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
saturn peripheral id	1	1	1	0	0	0	0	1
1st Data	Right	Left	Down	Up	Start	A TRG	C TRG	B TRG

Right,Left,Down,Up,Start,A TRG,C TRG,B TRG

It becomes 0 when the button is pressed.

◆Mega Drive 6 button pad

Table 3.15 shows the data format of the Mega Drive 6 button pad in SMPC control mode.

Table 3.15 Mega Drive 6 Button Pad Data Format

SMPC control mode	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
saturn peripheral id	1	1	1	0	0	0	1	0
1st Data	Right	Left	Down	Up	Start	A TRG	C TRG	B TRG
2nd Data	MODE	X TRG	Y TRG	Z TRG	1	1	1	1

Right,Left,Down,Up,Start,A TRG,C TRG,B TRG,MODE,X TRG,Y TRG,Z TRG

It becomes 0 when the button is pressed.

◆Shuttle mouse

Table 3.16 shows the shuttle mouse data format in SMPC control mode.

Table 3.16 Shuttle mouse data format

SMPC control mode	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
saturn peripheral id	1	1	1	0	0	0	1	1
1st Data	Y Over	X Over	Y Sign	X Sign	Start	Middle	Right	Left
2nd Data	XD7	XD6	XD5	XD4	XD3	XD2	XD1	XD0
3rd Data	YD7	YD6	YD5	YD4	YD3	YD2	YD1	YD0

Y Over,X Over

0:X or Y data is valid.

1: Data is overflowing. (Over 255)

Y Sign,X Sign

0:X,Y data are positive values.

1:X,Y data are negative values.

XD7～XD0,YD7～YD0

Mouse movement amount (see table below)

Table 3.16.1 Relationship between movement amount and flag

Actual amount of movement	-257 or less	-256	-255	...	-2	-1	+0	+1	+2	...	+254	+255	+256 or more
Values of D7 to D0	xxH	00H	01H	...	FEH	FFH	00H	01H	02H	...	FEH	FFH	xxH
Y/X Sign	1	1	1	...	1	1	0	0	0	...	0	0	0
Y/X Over	1	0	0	...	0	0	0	0	0	...	0	0	1

Note:

・D7 to D0 are not signed. Calculate the amount of movement by paying attention to the changes in each bit of Y/XOver and Y/XSign.

- If the Y/XOver bit is set, the amount of movement (D7 to D0) will be undefined, so be sure to check this bit.

Start,Middle,Right,Left

It becomes 1 when the button is pressed.

reference

Developer's Information/STN-44 "Shuttle Mouse Supplementary Information"

◆Sega Tap

In SMPC control mode, the port status shown in Table 3.17 is output. You can connect the Mega Drive 3 Button Pad, Mega Drive 6 Button Pad, and Sega Mouse to the Sega Tap. For data on each peripheral, please refer to the respective data format.

Table 3.17 Sega Tap port status in SMPC control mode

Multi-tap ID	Number of connections
0H	4H

◆Sega Saturn standard pad

Table 3.18 shows the Sega Saturn standard pad data format in SMPC control mode.

Table 3.18 Saturn standard putt data format

SMPC control mode	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
saturn peripheral id	0	0	0	0	0	0	1	0
1st Data	Right	Left	Down	Up	Start	A TRG	C TRG	B TRG
2nd Data	R TRG	X TRG	Y TRG	Z TRG	L TRG	1	1	1

A TRG,C TRG,B TRG,R TRG,X TRG,Y TRG,Z TRG,L TRG

Right, Left, Down, Up, Start

It becomes 0 when the button is pressed.

◆Mission stick

Table 3.19 shows the mission stick data format in SMPC control mode. Note that the data for AX7~0, AY7~0, and AZ7~0 are absolute values output by the A/D converter.

Table 3.19 Mission stick data format

SMPC control mode	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
saturn peripheral id	0	0	0	1	0	1	0	1
1st Data	Right	Left	Down	Up	Start	A TRG	C TRG	B TRG
2nd Data	R TRG	X TRG	Y TRG	Z TRG	L TRG	1	1	1
3rd Data	AX7	AX6	AX5	AX4	AX3	AX2	AX1	AX0
4th Data	AY7	AY6	AY5	AY4	AY3	AY2	AY1	AY0
5th Data	AZ7	AZ6	AZ5	AZ4	AZ3	AZ2	AZ1	AZ0

Right, Left, Down, Up

The digital bits change depending on the analog AX7 to AX0 and AY7 to AY0 thresholds.

The relationship between digital bits and thresholds is as follows.

Right

When AX becomes 170 or more, it becomes "0" (ON), and when it becomes 149 or less, it becomes "1" (OFF).

Left

When AX becomes 86 or less, it becomes "0" (ON), and when it becomes 107 or more, it becomes "1" (OFF).

Doun

When AY becomes 170 or more, it becomes "0" (ON), and when it becomes 149 or less, it becomes "1" (OFF).

Up

When AY becomes 86 or less, it becomes "0" (ON), and when it becomes 107 or more, it becomes "1" (OFF).

Start,A TRG,C TRG,B TRG,R TRG,X TRG,Y TRG,Z TRG,L TRG

It becomes 0 when the button is pressed.

AX7～AX0,AY7～AY0,AZ7～AZ0

The absolute value of the A/D converter output without sign is output.

AX7〜AX0,AY7〜AY0

The top left is (0,0) and the bottom right is (255,255).

AZ7~AZ0

The bottom is 0 and the top is 255.

reference

Developer's Information/STN-34 "Analog Mission Stick Manual"

◆Sega Saturn keyboard

Table 3.20 shows the Saturn keyboard data format in SMPC control mode.

Table 3.20 Saturn Keyboard Data Format

SMPC control mode	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
saturn peripheral id	0	0	1	1	0	1	0	0
1st Data	Right	Left	Down	Up	Start	A TRG	C TRG	B TRG
2nd Data	R TRG	X TRG	Y TRG	Z TRG	L TRG	KB TYPE2	KB TYPE1	KB TYPE0
3rd Data	0	Caps Lock	Num Lock	Scrool Lock	Make	1	1	Break
4th Data	D7	D6	D5	D4	D3	D2	D1	D0

A TRG,C TRG,B TRG,R TRG,X TRG,Y TRG,Z TRG,L TRG

Right, Left, Down, Up, Start

It becomes 0 when the button is pressed.

The correspondence between each button and the keys on the keyboard is as follows.

button	Compatible key		button	Compatible key
Right	→		C TRG	C
Left	←		B TRG	X
Down	↓		R TRG	E
Up	↑		X TRG	A
Start	Esc		Y TRG	S
A TRG	Z		Z TRG	D
L TRG	Q

KBTYPE2~0

000:Saturn keyboard

001～110:SEGA RESERVED

111:UNKNOWN

The KBTYPE shown here is used for the IBM Keyboard Converter Adapter format. Indicates 000 when an IBM keyboard 101,102,106 keyboard is connected to the conversion adapter. Additionally, if a keyboard that does not correspond to the conversion adapter or a device that cannot be recognized as a keyboard is connected, 111 will be output. In the future, if the keyboard is integrated into a commercial product, it will be configured to output 000.

Caps Lock (no LED)

1: Caps Lock is locked

Num Lock (no LED)

1:Num Lock is locked

Scroll Lock (no LED)

1: Scroll Lock is locked

Make

Indicates 1 when there is a valid Make code in D7-D0 (key press indicated by D7-D0 code).

Break

Indicates 1 when there is a valid Break code in D7 to D0 (the key press indicated by the D7 to D0 code is released).

D7～D0

Indicates the key number. Used with Make and Break .

reference

Developer's Information/STN-45 "Supplementary explanation of Saturn keyboard"

◆Multi terminal 6

In SMPC control mode, the port status shown in Table 3.21 is output. Multi Terminal 6 can be connected to the Mega Drive 3 button pad, Mega Drive 6 button pad, Sega Saturn standard pad , mission stick , shuttle mouse , and Sega Saturn keyboard . For information about each peripheral's data, refer to each peripheral's data format.
The maximum data size for each tap on Multi Terminal 6 is 15 bytes. Use port mode in 15-byte mode.

Table 3.21 Saturn 6P Multitap Port Status

Multi-tap ID	Number of connections
1H	6H

◆Multi controller

■Digital mode

SMPC control mode	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
saturn peripheral id	0	0	0	0	0	0	1	0
1st Data	Right	Left	Down	Up	Start	ATRG	CTRG	BTRG
2nd Data	RTRG	XTRG	YTRG	ZTRG	LTRG	1	1	1

Right, Left, Down, Up

When you press the key with the cross key, it becomes "0".

Start,ATRG,CTRG,BTRG

When you press the XTRG, YTRG, ZTRG button, it becomes "0"

RTRG,LTRG

The analog threshold returns digital data and becomes "0" when the button is pressed.

Note: Analog values are not output in this putt mode

■Analog mode

SMPC control mode	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
saturn peripheral id	0	0	0	1	0	1	1	0
1st Data	Right	Left	Down	Up	Start	ATRG	CTRG	BTRG
2nd Data	RTRG	XTRG	YTRG	ZTRG	LTRG	1	1	1
3rd Data	AX7	AX6	AX5	AX4	AX3	AX2	AX1	AX0
4th Data	AY7	AY6	AY5	AY4	AY3	AY2	AY1	AY0
5th Data	AR7	AR6	AR5	AR4	AR3	AR2	AR1	AR0
6th Data	AL7	AL6	AL5	AL4	AL3	AL2	AL1	AL0

◆Digital section

Right, Left, Down, Up

When you press the key with the cross key, it becomes "0"

Start,ATRG,CTRG,BTRG,XTRG,YTRG,ZTRG

When the button is pressed, it becomes "0"

RTRG,LTRG

The analog threshold returns digital data and becomes 0 when the button is pressed.

◆Analog section

AX7〜AX0,AY7〜AY0

Outputs the absolute value of the A/D converter output without sign.

AL7〜AL0,AR7〜AR0

Outputs the absolute value of the A/D converter output without sign.

reference

Developer's Information/STN-43 "Multi-controller manual"

◆Twin stick

SMPC control mode	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
saturn peripheral id	0	0	0	0	0	0	1	0
1st Data	Right	Left	Down	Up	Start	ATRG	CTRG	BTRG
2nd Data	RTRG	XTRG	YTRG	ZTRG	LTRG	1	1	1

Right,Left,Down,Up,Start,ATRG,CTRG,BTRG,RTRG,XTRG,YTRG,ZTRG,LTRG

When the button is pressed, it becomes "0".

Right, Left, Down, Up

These are the levers on the left stick (right, left, down, up).

LTRG

This is the left stick trigger.

RTRG

This is the button on the left stick.

ZTRG,XTRG,BTRG,YTRG

These are the levers on the right stick (right, left, down, up).

ATRG

This is the right stick trigger.

CTRG

This is the button on the right stick.

Key compatibility table with standard pads

left stick		right stick
Compatible key (twin)	Button name (standard)	Compatible key (twin)	Button name (standard)
trigger	L button	trigger	A button
button	R button	button	C button
↑(Up)	up key	↑(Up)	Y button
↓(Down)	down key	↓(down)	B button
→(right)	right key	→(right)	Z button
←(left)	left key	←(left)	X button

Note: The button name is written as the button name of the standard pad.

Developer's Information/STN-50 "Twin Stick User's Manual"

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▲

◆Racing controller

SMPC control mode	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
saturn peripheral id	0	0	0	1	0	0	1	1
1st DAta	Right	Left	Down	Up	Start	ATRG	CTRG	BTRG
2nd DAta	1	XTRG	YTRG	ZTRG	1	1	1	1
3rd Data	AX7	AX6	AX5	AX4	AX3	AX2	AX1	AX0

Start,ATRG,CTRG,BTRG,XTRG,YTRG,ZTRG

When the button is pressed, it becomes 0 (ON).

Down,Up

It becomes 0 (ON) when the butterfly shift is moved toward you.

AX7~AX0

The absolute value of the A/D converter output without sign is output.

AX7~AX0

The left side is 0 and the right side is 255. The center is 127.

reference

Developer's Information/STN-38 "Racing Controller Manual"

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Copyright SEGA ENTERPRISES, LTD., 1997