<4/5> SMPC Interface User's Manual / Data Specifications

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SMPC Interface User's Manual / Reference

Data specifications

Intoback command issuance

List Title Data specifications Data Peripheral ID data type Data Name PerId No 1.1

A data type that indicates a peripheral ID.

Defined value	Constant name	explanation
0xF0	PER_ID_NCON_UNKNOWN	Unconnected or SMPC-incompatible peripheral
0x00	PER_ID_DGT	Digital device
0x10	PER_ID_ANL	Analog devices
0x20	PER_ID_PNT	Pointing device (mega drive mouse)
0x30	PER_ID_KBD	keyboard
0xE0	PER_ID_MD	Mega drive (3 buttons, 6 buttons)

List Title Data specifications Data Peripheral size data type Data Name PerSize No 1.2

A data type that indicates the peripheral size.

Defined value	Constant name	explanation
0x0F	PER_SIZE_NCON_15	Unconnected or 15-byte device
0x02	PER_SIZE_DGT	Digital device
0x05	PER_SIZE_ANL	Mission stick
0x08	PER_SIZE_ANL2	Mission stick (2 sticks)
0x06	PER_SIZE_3DPAD	Multi controller
0x03	PER_SIZE_STEERING	Steering controller
0x03	PER_SIZE_PNT	Pointing device (shuttle mouse)
0x04	PER_SIZE_KBD	keyboard
0x01	PER_SIZE_M3BP	Mega drive 3 button pad
0x02	PER_SIZE_M6BP	Mega drive 6 button pad

List Title Data specifications Data Intoback type Data type Data Name PerKind No 1.3 1.3

A data type that indicates the importback type.

Constant name	explanation
PER_KD_SYS	System data acquisition (excluding time)
PER_KD_PER	Peripheral data acquisition
PER_KD_PERTIM	Peripheral data acquisition + time data acquisition

List Title Data specifications Data Required Peripheral Number Data Type Data Name PerNum No 1.4

A data type that indicates the required number of peripherals.

value	meaning
0-31	1P ~ 32P

List Title Data specifications Data System data output data type Data Name PerGetSys No 1.5

A data type that indicates system data output.

PerGetSys * data

Access macro	Mold	explanation
PER_GS_CC (data)	Uint8	Cartridge code
PER_GS_AC (data)	Uint8	Area code
PER_GS_SS (data)	Uint16	System status
PER_GS_SM (data)	Uint32	SMPC memory
PER_GS_SMPC_STAT (data)	Uint8	SMPC status

The constants and values that can be used in each access macro are shown below.

PER_GS_CC (data)

bit7							bit0
0	0	0	0	0	0	CTR1	CTR0

PER_GS_AC (data)

bit7							bit0
0	0	0	0	ACODE 3	ACODE 2	ACODE 1	ACODE 0

Refer to the hardware manual for the area indicated by the area code.

reference:

"HARDWARE MANUAL / SMPC User's Manual" INTBACK command

PER_GS_SS (data)

Bit position constant	Acquisition value
PER_SS_DOTSEL	DOTSEL signal status
PER_SS_SYSRES	SYSRES signal status
PER_SS_MSHNMI	MSHNMI signal state
PER_SS_SNDRES	SNDRES signal state
PER_SS_CDRES	CDRES signal state

Acquisition value description

value	meaning
0	OFF OFF
1	ON

PER_GS_SM (data)

This area is commonly used by applications and BOOT ROMs.

Defined value	Bit position constant	Acquisition value
0xF	PER_MSK_LANGU	Language constants (see below)
(0x1 << 8)	PER_MSK_SE	SE (0: ON, 1: OFF)
(0x1 << 9)	PER_MSK_STEREO	STEREO or MONO (0: STEREO, 1: MONO)
(0x1 << 10)	PER_MSK_HELP	HELP (0: ON, 1: OFF)

Language constants

Defined value	Constant name	explanation
0x0	PER_ENGLISH	English
0x1	PER_DEUTSCH	German
0x2	PER_FRANCAIS	French
0x3	PER_ESPNOL	Spanish
0x4	PER_ITALIANO	Italian
0x5	PER_JAPAN	Japanese

PER_GS_SMPC_STAT (data)

Defined value	Bit position constant	Acquisition value
(1 << 6)	PER_SS_RESET	Reset mask state
		0: Reset enable (default)
		1: Reset disable
(1 << 7)	PER_SS_SETTIME	Time setting status
		0: Time is not set after SMPC cold reset
		1: The time is set after SMPC cold reset.

List Title Data specifications Data Peripheral data output data type Data Name PerGetPer No 1.6: A data type that indicates peripheral data output.

List Title Data specifications Data Multi-tap information Data Name PerMulInfo No 1.7 1.7

Indicates the connection status of the peripheral connection terminal of the main unit.
You can get the following information for each terminal.

typedef struct {
    PerMulId id; / * Multitap ID * /
    PerMulCon con; / * Number of connectors * /
} PerMulInfo;

Acquisition example:

PerGetPer * per_data;
PerMulInfo * mul_info;
PER_LGetPer (& per_data, & mul_info);
    mul_info [0] .id Multi-tap ID of main unit terminal 1
    mul_info [0] .con Number of connectors for main unit terminal 1 mul_info [1] .id Multi-tap ID for main unit terminal 2
    mul_info [1] .con Number of connectors for main unit terminal 2

detail:

Multitap ID
Multi-tap connection
: (00 to E0) Symbol undefined
Not connected or directly connected
: (F0) PER_MID_NCON_ONE
UNKNOWN device
: (MD-PID) Symbol undefined
Virtual Gun
: (A0) Symbol undefined
Number of connectors
Unconnected or UNKNOWN device
: (00) PER_MCON_NCON_UNKNOWN
Direct connection
: (01) Symbol undefined
Number of connected multi-tap connectors
: (02-0F) Symbol undefined

remarks:

There are two types of multi-tap currently supported:

Multi-terminal 6 (Peripherals for Saturn can be connected) Multi-tap ID = 10, number of connectors = 06 Sega Tap (Peripheral for Mega Drive can be connected) Multi-tap ID = 00, number of connectors = 04

Device information data type (definition example) and bit position constant

The structure definition example when accessing each peripheral data and the bit position constant are shown.
Please refer to it when defining the type.

Bit position constant Common items

If the bit position constant described below is a button, the meaning is as follows:

Acquisition value description

value	meaning
0	Pressing the button
1	Not pressing the button

List Title Data specifications Data Digital device data Data Name smpDgtData No 2.1

This is an example of a data type definition that indicates digital device information.

typedef struct {/ * digital device * /
    PerId id; / * Peripheral type * /
    PerSize size; / * Peripheral size * /
    Uint16 data; / * Digital device data * /
} smpDgtData;

Below are the bit position constants for digital devices.

Uint16 data; / * Digital device data type * /

BIT position	Bit position constant	Acquisition value
bit15	PER_DGT_R	Direction key RIGHT
bit14	PER_DGT_L	Direction key LEFT
bit13	PER_DGT_D	Direction key DOWN
bit12	PER_DGT_U	Direction key UP
bit11	PER_DGT_S	START button
bit10	PER_DGT_A	A button
bit9	PER_DGT_C	C button
bit8	PER_DGT_B	B button
bit7	PER_DGT_TR	TRG-RIGHT (at the top right of the device)
bit6	PER_DGT_X	X button
bit5	PER_DGT_Y	Y button
bit4	PER_DGT_Z	Z button
bit3	PER_DGT_TL	TRG-LEFT (at the top left of the device)

List Title Data specifications Data Analog device data Data Name smpAnlData No 2.2

This is an example of a data type definition that indicates analog device information.

typedef struct {/ * analog device * /
	    PerId id; / * Peripheral type * /
    PerSize size; / * Peripheral size * /
    Uint16 data; / * Digital data * /
    Uint8 x; / * Analog ch0 data (0 to 255) * /
    Uint8 y; / * Analog ch1 data (0 to 255) * /
    Uint8 r; / * Analog ch2 data (0 to 255) * /
    Uint8 l; / * Analog ch3 data (0 to 255) * /
} smpAnlData;

List Title Data specifications Data Pointing device data Data Name smpPntData No 2.3

This is an example of a data type definition that indicates pointing device information.

typedef struct {/ * pointing device * /
    PerId id; / * Peripheral type * /
    PerSize size; / * Peripheral size * /
    Uint8 info; / * Overflow, code information * /
    Uint8 x; / * Absolute value of X-axis movement (0 to 127) * /
    Uint8 y; / * Absolute value of Y-axis movement (0 to 127) * /
} smpPntData;

The bit position constants that can be used for pointing devices are shown below.

Uint8 info; / * Overflow, code information * /

BIT position	Bit position constant	Acquisition value
bit7	PER_PNT_YO	Y-axis overflow (0: overflow, 1: non-overflow)
bit6	PER_PNT_XO	X-axis overflow (0: overflow, 1: non-overflow)
bit5	PER_PNT_YS	Y-axis sign (0: positive, 1: negative)
bit4	PER_PNT_XS	X-axis sign (0: positive, 1: negative)
bit3	PER_PNT_S	START button
bit2	PER_PNT_MID	Middle button
bit1	PER_PNT_R	Right button
bit0	PER_PNT_L	Left button

List Title Data specifications Data Keyboard device data Data Name smpKbdData No 2.4

This is an example of a data type definition that indicates a keyboard device.

typedef struct {/ * keyboard device data * /
    PerId id; / * Peripheral type * /
    PerSize size; / * Peripheral size * /
    PerDgtInfo dgt; / * Digital device data * /
    Uint8 skey; / * Special key * /
    Uint8 key; / * key * /
} smpKbdData;

The constants and values that can be used by each member are shown below.

BIT position	Bit position constant	Acquisition value
bit6	PER_KBD_CL	Caps Lock
bit5	PER_KBD_NL	Num Lock
bit4	PER_KBD_SL	Scrool Lock
bit3	PER_KBD_MK	Make (0: key pressed, 1: not pressed)
bit0	PER_KBD_BR	Break (0: key released, 1: key not released)

Please refer to the following information for key codes and countermeasures against simultaneous pressing.

reference:

Devloper's Information STN-45 Sega Saturn Keyboard Supplementary Explanation

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★ PROGRAMMER'S GUIDE ★ SMPC Interface User's Manual

Multi-tap connection	: (00 to E0) Symbol undefined
Not connected or directly connected	: (F0) PER_MID_NCON_ONE
UNKNOWN device	: (MD-PID) Symbol undefined
Virtual Gun	: (A0) Symbol undefined

Unconnected or UNKNOWN device	: (00) PER_MCON_NCON_UNKNOWN
Direct connection	: (01) Symbol undefined
Number of connected multi-tap connectors	: (02-0F) Symbol undefined

Data specifications

Intoback command issuance

Data specifications

Peripheral ID data type

PerId

1.1

Data specifications

Peripheral size data type

PerSize

1.2

Data specifications

Intoback type Data type

PerKind

1.3 1.3

Data specifications

Required Peripheral Number Data Type

PerNum

1.4

Data specifications

System data output data type

PerGetSys

1.5

Data specifications

Peripheral data output data type

PerGetPer

1.6

Data specifications

Multi-tap information

PerMulInfo

1.7 1.7

Device information data type (definition example) and bit position constant

Bit position constant Common items

Data specifications

Digital device data

smpDgtData

2.1

Data specifications

Analog device data

smpAnlData

2.2

Data specifications

Pointing device data

smpPntData

2.3

Data specifications

Keyboard device data

smpKbdData

2.4