mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-12-28 12:11:50 +01:00
improved I/O emulation accuracy
optimized gamepad/teamplayer code
This commit is contained in:
ekeeke31
parent
7a28d34f4d
commit
b758b0b57e
@ -110,10 +110,10 @@ static void lightgun_update(int num)
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}
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/* Sega Menacer specific */
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uint32 menacer_read(void)
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unsigned int menacer_read(void)
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{
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/* pins should return 0 by default (fix Body Count when mouse is enabled) */
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int retval = 0x00;
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unsigned int retval = 0x00;
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if (input.pad[4] & INPUT_B) retval |= 0x01;
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if (input.pad[4] & INPUT_A) retval |= 0x02;
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if (input.pad[4] & INPUT_C) retval |= 0x04;
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@ -123,11 +123,11 @@ uint32 menacer_read(void)
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}
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/* Konami Justifier specific */
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uint32 justifier_read(void)
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unsigned int justifier_read(void)
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{
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/* TL & TR pins should always return 1 (write only) */
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/* LEFT & RIGHT pins should always return 0 (needed during gun detection) */
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int retval = 0x73;
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unsigned int retval = 0x73;
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switch (io_reg[2])
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{
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@ -169,7 +169,7 @@ static inline void mouse_reset(void)
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mouse.Port = (input.system[0] == SYSTEM_MOUSE) ? 0 : 4;
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}
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void mouse_write(uint32 data)
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void mouse_write(unsigned int data)
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{
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if (mouse.Counter == 0)
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{
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@ -199,9 +199,9 @@ void mouse_write(uint32 data)
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mouse.State = data;
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}
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uint32 mouse_read()
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unsigned int mouse_read()
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{
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int temp = 0x00;
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unsigned int temp = 0x00;
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switch (mouse.Counter)
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{
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@ -282,30 +282,33 @@ static struct pad
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uint8 Delay;
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} gamepad[MAX_DEVICES];
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static inline void gamepad_raz(uint32 i)
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static inline void gamepad_raz(int i)
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{
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gamepad[i].Counter = 0;
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gamepad[i].Delay = 0;
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}
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static inline void gamepad_reset(uint32 i)
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static inline void gamepad_reset(int i)
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{
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gamepad[i].State = 0x40;
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gamepad[i].State = 0x00;
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if (input.dev[i] == DEVICE_6BUTTON) gamepad_raz(i);
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}
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static inline void gamepad_update(uint32 i)
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static inline void gamepad_update(int i)
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{
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if (gamepad[i].Delay++ > 25) gamepad_raz(i);
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}
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static inline uint32 gamepad_read(uint32 i)
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static inline unsigned int gamepad_read(int i)
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{
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/* bit7 is latched */
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int retval = 0x7F;
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unsigned int retval = 0x7F;
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/* pad status */
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unsigned int pad = input.pad[i];
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/* current TH state */
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int control = (gamepad[i].State & 0x40) >> 6;
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unsigned int control = (gamepad[i].State & 0x40) >> 6;
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/* TH transitions counter */
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if (input.dev[i] == DEVICE_6BUTTON)
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@ -318,23 +321,16 @@ static inline uint32 gamepad_read(uint32 i)
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case 5: /*** Third High ***/
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/* TH = 1 : ?1CBRLDU */
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if (input.pad[i] & INPUT_C) retval &= ~0x20;
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if (input.pad[i] & INPUT_B) retval &= ~0x10;
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if (input.pad[i] & INPUT_UP) retval &= ~0x01;
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if (input.pad[i] & INPUT_DOWN) retval &= ~0x02;
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if (input.pad[i] & INPUT_LEFT) retval &= ~0x04;
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if (input.pad[i] & INPUT_RIGHT) retval &= ~0x08;
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retval &= ~(pad & 0x3F);
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break;
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case 0: /*** First low ***/
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case 2: /*** Second low ***/
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/* TH = 0 : ?0SA00DU */
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if (input.pad[i] & INPUT_A) retval &= ~0x10;
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if (input.pad[i] & INPUT_START) retval &= ~0x20;
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if (input.pad[i] & INPUT_UP) retval &= ~0x01;
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if (input.pad[i] & INPUT_DOWN) retval &= ~0x02;
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retval &= 0xB3;
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retval &= ~(pad & 0x03);
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retval &= ~((pad >> 2) & 0x30);
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retval &= ~0x0C;
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break;
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/* 6buttons specific (taken from gen-hw.txt) */
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@ -352,28 +348,21 @@ static inline uint32 gamepad_read(uint32 i)
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case 4: /*** Third Low ***/
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/* TH = 0 : ?0SA0000 D3-0 are forced to '0'*/
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if (input.pad[i] & INPUT_A) retval &= ~0x10;
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if (input.pad[i] & INPUT_START) retval &= ~0x20;
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retval &= 0xB0;
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retval &= ~((pad >> 2) & 0x30);
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retval &= ~0x0F;
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break;
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case 6: /*** Fourth Low ***/
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/* TH = 0 : ?0SA1111 D3-0 are forced to '1'*/
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if (input.pad[i] & INPUT_A) retval &= ~0x10;
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if (input.pad[i] & INPUT_START) retval &= ~0x20;
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retval &= 0xBF;
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retval &= ~((pad >> 2) & 0x30);
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break;
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case 7: /*** Fourth High ***/
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/* TH = 1 : ?1CBMXYZ Extra buttons returned in D3-0*/
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if (input.pad[i] & INPUT_X) retval &= ~0x04;
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if (input.pad[i] & INPUT_Y) retval &= ~0x02;
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if (input.pad[i] & INPUT_Z) retval &= ~0x01;
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if (input.pad[i] & INPUT_B) retval &= ~0x10;
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if (input.pad[i] & INPUT_C) retval &= ~0x20;
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if (input.pad[i] & INPUT_MODE) retval &= ~0x08;
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retval &= ~(pad & 0x30);
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retval &= ~((pad >> 8) & 0x0F);
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break;
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default:
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@ -383,7 +372,7 @@ static inline uint32 gamepad_read(uint32 i)
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return retval;
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}
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static inline void gamepad_write(uint32 i, uint32 data)
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static inline void gamepad_write(int i, unsigned int data)
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{
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if (input.dev[i] == DEVICE_6BUTTON)
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{
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@ -394,7 +383,6 @@ static inline void gamepad_write(uint32 i, uint32 data)
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gamepad[i].Delay = 0;
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}
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}
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gamepad[i].State = data;
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}
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@ -410,132 +398,113 @@ static struct teamplayer
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uint8 Table[12];
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} teamplayer[2];
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static inline void teamplayer_init(uint32 port)
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static inline void teamplayer_init(int port)
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{
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int i;
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int i,padnum;
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int index = 0;
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int pad_input = 0;
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/* this table determines which gamepad input should be returned during acquisition sequence
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index = teamplayer read table index: 0=1st read, 1=2nd read, ...
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pad_input = gamepad input 0-14: 0=P1_DIR, 1=P1_SABC, 2=P1_MXYZ, 4=P2_DIR, 5=P2_SABC, ...
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index = teamplayer read table index: 0=1st read, 1=2nd read, ...
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table = high bits are pad index, low bits are pad input shift: 0=RLDU, 4=SABC, 8=MXYZ
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*/
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for (i=0; i<4; i++)
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{
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if (input.dev[(4*port) + i] == DEVICE_3BUTTON)
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padnum = (4 * port) + i;
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if (input.dev[padnum] == DEVICE_3BUTTON)
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{
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teamplayer[port].Table[index++] = pad_input;
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teamplayer[port].Table[index++] = pad_input + 1;
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padnum = padnum << 4;
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teamplayer[port].Table[index++] = padnum;
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teamplayer[port].Table[index++] = padnum | 4;
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}
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else if (input.dev[(4*port) + i] == DEVICE_6BUTTON)
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{
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teamplayer[port].Table[index++] = pad_input;
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teamplayer[port].Table[index++] = pad_input + 1;
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teamplayer[port].Table[index++] = pad_input + 2;
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padnum = padnum << 4;
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teamplayer[port].Table[index++] = padnum;
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teamplayer[port].Table[index++] = padnum | 4;
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teamplayer[port].Table[index++] = padnum | 8;
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}
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pad_input += 4;
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}
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}
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static inline void teamplayer_reset(uint32 port)
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static inline void teamplayer_reset(int port)
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{
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teamplayer[port].State = 0x60; /* TH = 1, TR = 1 */
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teamplayer[port].Counter = 0;
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}
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/* SEGA teamplayer returns successively:
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- PAD1 inputs
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- PAD2 inputs
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- PAD3 inputs
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- PAD4 inputs
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Each PAD inputs is obtained through 2 or 3 sequential reads:
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1/ DIR buttons
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2/ START,A,C,B buttons
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3/ MODE, X,Y,Z buttons (6Button only !)
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*/
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static inline uint32 teamplayer_read_device(uint32 port, uint32 index)
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static inline unsigned int teamplayer_read(int port)
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{
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int retval = 0x7F;
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int pad_input = teamplayer[port].Table[index] & 0x03;
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int pad_num = (4 * port) + ((teamplayer[port].Table[index] >> 2) & 0x03);
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unsigned int counter = teamplayer[port].Counter;
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switch (pad_input)
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/* acquisition sequence */
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switch (counter)
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{
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case 0:
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/* Directions Buttons */
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if (input.pad[pad_num] & INPUT_UP) retval &= ~0x01;
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if (input.pad[pad_num] & INPUT_DOWN) retval &= ~0x02;
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if (input.pad[pad_num] & INPUT_LEFT) retval &= ~0x04;
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if (input.pad[pad_num] & INPUT_RIGHT) retval &= ~0x08;
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break;
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case 0: /* initial state: TH = 1, TR = 1 -> RLDU = 0011 */
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{
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return 0x73;
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}
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case 1:
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/* S,A,C,B Buttons */
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if (input.pad[pad_num] & INPUT_B) retval &= ~0x01;
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if (input.pad[pad_num] & INPUT_C) retval &= ~0x02;
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if (input.pad[pad_num] & INPUT_A) retval &= ~0x04;
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if (input.pad[pad_num] & INPUT_START) retval &= ~0x08;
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break;
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case 1: /* start request: TH = 0, TR = 1 -> RLDU = 1111 */
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{
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return 0x3F;
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}
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case 2:
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/* M,X,Y,Z Buttons (6-Buttons only)*/
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if (input.pad[pad_num] & INPUT_Z) retval &= ~0x01;
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if (input.pad[pad_num] & INPUT_Y) retval &= ~0x02;
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if (input.pad[pad_num] & INPUT_X) retval &= ~0x04;
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if (input.pad[pad_num] & INPUT_MODE) retval &= ~0x08;
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break;
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}
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return retval;
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}
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static inline uint32 teamplayer_read(uint32 port)
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{
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int retval = 0x7F;
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int padnum;
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switch (teamplayer[port].Counter) /* acquisition sequence steps */
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{
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case 0: /* initial state: TH = 1, TR = 1 */
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retval = 0x73;
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break;
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case 1: /* start request: TH = 0, TR = 1 */
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retval = 0x3F;
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break;
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case 2:
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case 3: /* ack request: TH=0, TR handshake */
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retval = 0x00;
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break;
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case 3: /* ack request: TH=0, TR=0/1 -> RLDU = 0000 */
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{
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/* TL should match TR */
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return ((teamplayer[port].State & 0x20) >> 1);
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}
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case 4:
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case 5:
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case 6:
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case 7: /* gamepads type */
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padnum = (4 * port) + teamplayer[port].Counter - 4;
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retval = input.dev[padnum];
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break;
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case 7: /* PAD type */
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{
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unsigned int retval = input.dev[(port << 2) + (counter - 4)];
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default: /* gamepads inputs acquisition */
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retval = teamplayer_read_device(port, teamplayer[port].Counter - 8);
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break;
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/* TL should match TR */
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return (((teamplayer[port].State & 0x20) >> 1) | retval);
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}
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default: /* PAD status */
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{
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unsigned int retval = 0x0F;
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/* SEGA teamplayer returns successively PAD1 -> PAD2 -> PAD3 -> PAD4 inputs */
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unsigned int padnum = teamplayer[port].Table[counter - 8] >> 4;
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/* Each PAD inputs is obtained through 2 or 3 sequential reads: RLDU -> SACB -> MXYZ */
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retval &= ~(input.pad[padnum] >> (teamplayer[port].Table[counter - 8] & 0x0F));
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/* TL should match TR */
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return (((teamplayer[port].State & 0x20) >> 1) | retval);
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}
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}
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/* TL must match TR state */
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retval &= ~0x10;
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if (teamplayer[port].State & 0x20) retval |= 0x10;
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return retval;
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}
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static inline void teamplayer_write(uint32 port, uint32 data)
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static inline void teamplayer_write(int port, unsigned int data)
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{
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int old_state = teamplayer[port].State;
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teamplayer[port].State = (data & io_reg[port+4]) | (teamplayer[port].State & ~io_reg[port+4]);
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if (old_state != teamplayer[port].State) teamplayer[port].Counter ++;
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if ((data&0x60) == 0x60) teamplayer[port].Counter = 0;
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/* update output bits only */
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unsigned int state = (teamplayer[port].State & ~io_reg[port + 4]) | (data & io_reg[port + 4]);
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/* TH & TR handshaking */
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if ((teamplayer[port].State ^ state) & 0x60)
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{
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if (state & 0x40)
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{
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/* TH high -> reset counter */
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teamplayer[port].Counter = 0;
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}
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else
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{
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/* increment counter */
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teamplayer[port].Counter ++;
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}
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/* update internal state */
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teamplayer[port].State = state;
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}
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}
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/*****************************************************************************
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@ -547,15 +516,15 @@ static struct wayplay
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uint8 current;
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} wayplay;
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static inline void wayplay_write(uint32 port, uint32 data)
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static inline void wayplay_write(int port, unsigned int data)
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{
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if (port == 0) gamepad_write(wayplay.current, data);
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if (!port && (io_reg[4] & 0x40)) gamepad_write(wayplay.current, data);
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else wayplay.current = (data >> 4) & 0x07;
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}
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static inline uint32 wayplay_read(uint32 port)
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static inline unsigned int wayplay_read(int port)
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{
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if (port == 1) return 0x7F;
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if (port) return 0x7F;
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if (wayplay.current >= 4) return 0x70; /* multitap detection (TH2 = 1) */
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return gamepad_read(wayplay.current); /* 0x0C = Pad1, 0x1C = Pad2, ... */
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}
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@ -565,73 +534,73 @@ static inline uint32 wayplay_read(uint32 port)
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* I/O wrappers
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*
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*****************************************************************************/
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uint32 gamepad_1_read (void)
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unsigned int gamepad_1_read (void)
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{
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return gamepad_read(0);
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}
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uint32 gamepad_2_read (void)
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unsigned int gamepad_2_read (void)
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{
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return gamepad_read(4);
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}
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void gamepad_1_write (uint32 data)
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void gamepad_1_write (unsigned int data)
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{
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gamepad_write(0, data);
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if (io_reg[4] & 0x40) gamepad_write(0, data);
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}
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void gamepad_2_write (uint32 data)
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void gamepad_2_write (unsigned int data)
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{
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gamepad_write(4, data);
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if (io_reg[5] & 0x40) gamepad_write(4, data);
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}
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uint32 wayplay_1_read (void)
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unsigned int wayplay_1_read (void)
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{
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return wayplay_read(0);
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}
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uint32 wayplay_2_read (void)
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unsigned int wayplay_2_read (void)
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{
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return wayplay_read(1);
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}
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void wayplay_1_write (uint32 data)
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void wayplay_1_write (unsigned int data)
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{
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wayplay_write(0, data);
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}
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void wayplay_2_write (uint32 data)
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void wayplay_2_write (unsigned int data)
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{
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wayplay_write(1, data);
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}
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uint32 teamplayer_1_read (void)
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unsigned int teamplayer_1_read (void)
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{
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return teamplayer_read(0);
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}
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uint32 teamplayer_2_read (void)
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unsigned int teamplayer_2_read (void)
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{
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return teamplayer_read(1);
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}
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void teamplayer_1_write (uint32 data)
|
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void teamplayer_1_write (unsigned int data)
|
||||
{
|
||||
teamplayer_write(0, data);
|
||||
}
|
||||
|
||||
void teamplayer_2_write (uint32 data)
|
||||
void teamplayer_2_write (unsigned int data)
|
||||
{
|
||||
teamplayer_write(1, data);
|
||||
}
|
||||
|
||||
uint32 jcart_read(uint32 address)
|
||||
unsigned int jcart_read(unsigned int address)
|
||||
{
|
||||
/* TH2 (output) fixed to 0 on read (fixes Micro Machines 2) */
|
||||
return (gamepad_read(5) | ((gamepad_read(6)&0x3f) << 8));
|
||||
}
|
||||
|
||||
void jcart_write(uint32 address, uint32 data)
|
||||
void jcart_write(unsigned int address, unsigned int data)
|
||||
{
|
||||
gamepad_write(5, (data&1) << 6);
|
||||
gamepad_write(6, (data&1) << 6);
|
||||
|
||||
@ -37,15 +37,15 @@
|
||||
|
||||
/* Input bitmasks */
|
||||
#define INPUT_MODE (0x0800)
|
||||
#define INPUT_Z (0x0400)
|
||||
#define INPUT_X (0x0400)
|
||||
#define INPUT_Y (0x0200)
|
||||
#define INPUT_X (0x0100)
|
||||
#define INPUT_Z (0x0100)
|
||||
#define INPUT_START (0x0080)
|
||||
#define INPUT_C (0x0040)
|
||||
#define INPUT_B (0x0020)
|
||||
#define INPUT_A (0x0010)
|
||||
#define INPUT_LEFT (0x0008)
|
||||
#define INPUT_RIGHT (0x0004)
|
||||
#define INPUT_A (0x0040)
|
||||
#define INPUT_C (0x0020)
|
||||
#define INPUT_B (0x0010)
|
||||
#define INPUT_RIGHT (0x0008)
|
||||
#define INPUT_LEFT (0x0004)
|
||||
#define INPUT_DOWN (0x0002)
|
||||
#define INPUT_UP (0x0001)
|
||||
|
||||
|
||||
@ -28,10 +28,19 @@ uint8 region_code = REGION_USA;
|
||||
|
||||
static struct port_t
|
||||
{
|
||||
void (*data_w)(uint32 data);
|
||||
uint32 (*data_r)(void);
|
||||
void (*data_w)(unsigned int data);
|
||||
unsigned int (*data_r)(void);
|
||||
} port[3];
|
||||
|
||||
static void dummy_write(unsigned int data)
|
||||
{
|
||||
}
|
||||
|
||||
static unsigned int dummy_read(void)
|
||||
{
|
||||
return 0x7F;
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
* I/O chip functions *
|
||||
* *
|
||||
@ -62,8 +71,8 @@ void io_init(void)
|
||||
break;
|
||||
|
||||
default:
|
||||
port[0].data_w = NULL;
|
||||
port[0].data_r = NULL;
|
||||
port[0].data_w = dummy_write;
|
||||
port[0].data_r = dummy_read;
|
||||
break;
|
||||
}
|
||||
|
||||
@ -80,12 +89,12 @@ void io_init(void)
|
||||
break;
|
||||
|
||||
case SYSTEM_MENACER:
|
||||
port[1].data_w = NULL;
|
||||
port[1].data_w = dummy_write;
|
||||
port[1].data_r = menacer_read;
|
||||
break;
|
||||
|
||||
case SYSTEM_JUSTIFIER:
|
||||
port[1].data_w = NULL;
|
||||
port[1].data_w = dummy_write;
|
||||
port[1].data_r = justifier_read;
|
||||
break;
|
||||
|
||||
@ -100,14 +109,14 @@ void io_init(void)
|
||||
break;
|
||||
|
||||
default:
|
||||
port[1].data_w = NULL;
|
||||
port[1].data_r = NULL;
|
||||
port[1].data_w = dummy_write;
|
||||
port[1].data_r = dummy_read;
|
||||
break;
|
||||
}
|
||||
|
||||
/* External Port (unconnected) */
|
||||
port[2].data_w = NULL;
|
||||
port[2].data_r = NULL;
|
||||
port[2].data_w = dummy_write;
|
||||
port[2].data_r = dummy_read;
|
||||
|
||||
/* Initialize connected input devices */
|
||||
input_init();
|
||||
@ -118,9 +127,9 @@ void io_reset(void)
|
||||
{
|
||||
/* Reset I/O registers */
|
||||
io_reg[0x00] = region_code | 0x20 | (config.tmss & 1);
|
||||
io_reg[0x01] = 0x7F;
|
||||
io_reg[0x02] = 0x7F;
|
||||
io_reg[0x03] = 0x7F;
|
||||
io_reg[0x01] = 0x00;
|
||||
io_reg[0x02] = 0x00;
|
||||
io_reg[0x03] = 0x00;
|
||||
io_reg[0x04] = 0x00;
|
||||
io_reg[0x05] = 0x00;
|
||||
io_reg[0x06] = 0x00;
|
||||
@ -138,35 +147,37 @@ void io_reset(void)
|
||||
input_reset();
|
||||
}
|
||||
|
||||
void io_write(uint32 offset, uint32 value)
|
||||
void io_write(unsigned int offset, unsigned int data)
|
||||
{
|
||||
switch (offset)
|
||||
{
|
||||
case 0x01: /* Port A Data */
|
||||
case 0x02: /* Port B Data */
|
||||
case 0x03: /* Port C Data */
|
||||
io_reg[offset] = value & (0x80 | io_reg[offset+3]);
|
||||
if(port[offset-1].data_w)
|
||||
port[offset-1].data_w(value);
|
||||
io_reg[offset] = data;
|
||||
port[offset-1].data_w(data);
|
||||
return;
|
||||
|
||||
case 0x04: /* Port A Ctrl */
|
||||
case 0x05: /* Port B Ctrl */
|
||||
case 0x06: /* Port C Ctrl */
|
||||
io_reg[offset] = value;
|
||||
io_reg[offset-3] &= (0x80 | value);
|
||||
if (data != io_reg[offset])
|
||||
{
|
||||
io_reg[offset] = data;
|
||||
port[offset-4].data_w(io_reg[offset-3]);
|
||||
}
|
||||
return;
|
||||
|
||||
case 0x07: /* Port A TxData */
|
||||
case 0x0A: /* Port B TxData */
|
||||
case 0x0D: /* Port C TxData */
|
||||
io_reg[offset] = value;
|
||||
io_reg[offset] = data;
|
||||
return;
|
||||
|
||||
case 0x09: /* Port A S-Ctrl */
|
||||
case 0x0C: /* Port B S-Ctrl */
|
||||
case 0x0F: /* Port C S-Ctrl */
|
||||
io_reg[offset] = value & 0xF8;
|
||||
io_reg[offset] = data & 0xF8;
|
||||
return;
|
||||
|
||||
default: /* Read-only ports */
|
||||
@ -174,7 +185,7 @@ void io_write(uint32 offset, uint32 value)
|
||||
}
|
||||
}
|
||||
|
||||
uint32 io_read(uint32 offset)
|
||||
unsigned int io_read(unsigned int offset)
|
||||
{
|
||||
switch(offset)
|
||||
{
|
||||
@ -182,13 +193,12 @@ uint32 io_read(uint32 offset)
|
||||
case 0x02: /* Port B Data */
|
||||
case 0x03: /* Port C Data */
|
||||
{
|
||||
uint8 input = 0x7F;
|
||||
if(port[offset-1].data_r)
|
||||
input = port[offset-1].data_r();
|
||||
return (io_reg[offset] | ((~io_reg[offset+3]) & input));
|
||||
unsigned int mask = 0x80 | io_reg[offset + 3];
|
||||
unsigned int data = port[offset-1].data_r();
|
||||
return (io_reg[offset] & mask) | (data & ~mask);
|
||||
}
|
||||
|
||||
default: /* return register value */
|
||||
return (io_reg[offset]);
|
||||
return io_reg[offset];
|
||||
}
|
||||
}
|
||||
|
||||
@ -37,8 +37,8 @@ extern int old_system[2];
|
||||
/* Function prototypes */
|
||||
extern void io_init(void);
|
||||
extern void io_reset(void);
|
||||
extern void io_write(uint32 offset, uint32 value);
|
||||
extern uint32 io_read(uint32 offset);
|
||||
extern void io_write(unsigned int offset, unsigned int data);
|
||||
extern unsigned int io_read(unsigned int offset);
|
||||
|
||||
#endif /* _IO_H_ */
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user