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[Core/IO] fixed 4 Way-Play adapter compatibility mode

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This commit is contained in:
EkeEke 2016-03-20 19:22:00 +01:00
parent c0e7e595e4
commit 23e8ff387e
4 changed files with 15 additions and 8 deletions
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23
core/input_hw/gamepad.c
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@ -65,8 +65,8 @@ void gamepad_reset(int port)
gamepad[port].Timeout = 0; gamepad[port].Timeout = 0;
gamepad[port].Latency = 0; gamepad[port].Latency = 0;
/* reset 4-WayPlay latch */ /* reset 4-WayPlay latch (controller #0 used by default) */
latch = 0; latch = 0x00;
/* reset Master Tap flip-flop */ /* reset Master Tap flip-flop */
flipflop[port>>2].Latch = 0; flipflop[port>>2].Latch = 0;
@ -211,7 +211,7 @@ INLINE void gamepad_write(int port, unsigned char data, unsigned char mask)
/* retrieve current timestamp */ /* retrieve current timestamp */
unsigned int cycles = ((system_hw & SYSTEM_PBC) == SYSTEM_MD) ? m68k.cycles : Z80.cycles; unsigned int cycles = ((system_hw & SYSTEM_PBC) == SYSTEM_MD) ? m68k.cycles : Z80.cycles;
/* TH is pulled high when not configured as output by I/O controller output */ /* TH is pulled high when not configured as output by I/O controller */
data = 0x40; data = 0x40;
/* TH 0->1 internal switching does not occur immediately (verified on MK-1650 model) */ /* TH 0->1 internal switching does not occur immediately (verified on MK-1650 model) */
@ -255,14 +255,14 @@ void gamepad_2_write(unsigned char data, unsigned char mask)
unsigned char wayplay_1_read(void) unsigned char wayplay_1_read(void)
{ {
/* check if TH on port B is HIGH */ /* check if latched TH input on port B is HIGH */
if (latch & 0x04) if (latch & 0x04)
{ {
/* 4-WayPlay detection : xxxxx00 */ /* 4-WayPlay detection : xxxxx00 */
return 0x7C; return 0x7C;
} }
/* TR & TL on port B select controller # (0-3) */ /* latched TR & TL input state on port B select controller # (0-3) on port A */
return gamepad_read(latch); return gamepad_read(latch);
} }
@ -273,14 +273,21 @@ unsigned char wayplay_2_read(void)
void wayplay_1_write(unsigned char data, unsigned char mask) void wayplay_1_write(unsigned char data, unsigned char mask)
{ {
/* TR & TL on port B select controller # (0-3) */ /* latched TR & TL input state on port B select controller # (0-3) on port A */
gamepad_write(latch & 0x03, data, mask); gamepad_write(latch & 0x03, data, mask);
} }
void wayplay_2_write(unsigned char data, unsigned char mask) void wayplay_2_write(unsigned char data, unsigned char mask)
{ {
/* latch TH, TR & TL state on port B */ /* pins not configured as output by I/O controller are pulled HIGH */
latch = ((data & mask) >> 4) & 0x07; data |= ~mask;
/* check if both UP & DOWN inputs are LOW */
if (!(data & 0x03))
{
/* latch TH, TR & TL input state */
latch = (data >> 4) & 0x07;
}
} }