STN-34

analog mission stick

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Contents

mission stick manual

Ver1.00

■Overview of analog mission stick

●3-axis mode

The mission stick consists of a base unit and a removable stick unit.
The base unit is equipped with two stick connection terminals (stick #1, #2), A, B, C, X, Y, X, L, R buttons and a start button, and is connected to the Sega Saturn main unit. To do. The stick unit is equipped with 3-axis sticks (AX, AY, AZ) and triggers A, B, and C, and is connected to the stick#1 terminal of the base unit.
Also, for AX and AY, digital bits (Right, Left, Down, Up) are output.

●Caution

If you have only one stick, be sure to connect it to the stick#1 terminal .

●6-axis mode

By connecting the optional stick (sold separately) to the stick#2 terminal, it becomes 6-axis mode.
Digital bits (Right, Left, Down, Up) are output only to the stick connected to stick#1 terminal.
Also, triggers A, B, and C of the stick connected to the stick#1 terminal are output to ATRG, BTRG, and CTRG, and triggers A, B, and C of the stick connected to the stick#2 terminal are output to XTRG, YTRG. ,is output to ZTRG.

■Mission stick data format

●Peripheral ID in 3-axis mode

Saturn peripheral type: 1H (analog device)

Data size: 5H (5 bytes)

3-axis mode data format

	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
Peripheral ID	0	0	0	1	0	1	0	1
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	AZ7	AZ6	AZ5	AZ4	AZ3	AZ2	AZ1	AZ0

• Start, ATRG, CTRG, BTRG, RTRG, XTRG, YTRG, ZTRG, and LTRG become 0 when you press the button.
• AX7 to AX0, AY7 to AY0, AZ7 to AZ0 output the absolute value of the A/D converter output without sign.
• For AX7~AX0,AY7~AY0, the upper left is (0,0) and the lower right is (255,255).
• For AZ7 to AZ0, the bottom is 0 and the top is 255.

The lower 3 bits of the 2nd data [Bit2-0] = 111B are reserved as future expansion bits, so programming that expects this value (111B) is prohibited.

●About digital bits

To operate the Sega Saturn's main menu screen, the digital bits (Right, Left, Up, Down) change depending on the AX and AY thresholds as shown below.

＜ Figure 1 Digital value and threshold value＞

• Right becomes "0" (ON) when AX becomes 170 or more, and becomes "1" (OFF) when it becomes 149 or less.
• Left becomes "0" (ON) when AX becomes 86 or less, and becomes "1" (OFF) when AX becomes 107 or more.
• Doun becomes "0" (ON) when AY becomes 170 or more, and becomes "1" (OFF) when AY becomes 149 or less.
• Up becomes "0" (ON) when AY becomes 86 or less, and becomes "1" (OFF) when AY becomes 107 or more.

●Peripheral ID in 6-axis mode

Saturn peripheral type: 1H (analog device)

Data size: 9H (9 bytes)

●6-axis mode data format

	bit7	bit6	bit5	bit4	bit3	bit2	bit1	bit0
Peripheral ID	0	0	0	1	1	0	0	1
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	AZ7	AZ6	AZ5	AZ4	AZ3	AZ2	AZ1	AZ0
6th data	*	*	*	*	1	1	1	1
7rd data	BX7	BX6	BX5	BX4	BX3	BX2	BX1	BX0
8th data	BY7	BY6	BY5	BY4	BY3	BY2	BY1	BY0
9th data	BZ7	BZ6	BZ5	BZ4	BZ3	BZ2	BZ1	BZ0

• 6-axis mode can be used by connecting an option stick to 3-axis mode.

• 7th to 9th Data is the analog data of the option stick.

• The data marked with * is undefined, so the use of digital bits on the option stick is prohibited.
  Note: Digital bits are only available on the main stick, refer to 3-axis mode for threshold values .

• Start, ATRG, CTRG, BTRG, RTRG, XTRG, YTRG, ZTRG, and LTRG become 0 when you press the button.

• Main stick triggers A, B, and C are output to ATRG, BTRG, and CTRG, respectively.

• Option stick triggers A, B, and C are output to XTRG, YTRG, and ZTRG, respectively.

• AX7~AX0, AY7~AY0, AZ7~AZ0, BX7~BX0, BY7~BY0, BZ7~BZ0 are the absolute values of the unsigned A/D converter outputs.

• For AX7~AX0,AY7~AY0,BX7~BX0,BY7~BY0, the upper left is (0,0) and the lower right is (255,255)

• For AZ7~AZ0, BZ7~BZ0, the bottom is 0 and the top is 255.