RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 15:27:46 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

improve input handling

Browse source
This commit is contained in:
notaz 2013-08-17 03:04:15 +03:00
parent be7867d875
commit 531a8f3883
12 changed files with 170 additions and 108 deletions
Download patch file Download diff file Expand all files Collapse all files

132
pico/memory.c
View file

@ -186,62 +186,119 @@ void cyclone_crashed(u32 pc, struct Cyclone *context)
// -----------------------------------------------------------------
// memmap helpers
#ifndef _ASM_MEMORY_C
static
#endif
int PadRead(int i)
static u32 read_pad_3btn(int i, u32 out_bits)
{
int pad,value,data_reg;
pad=~PicoPadInt[i]; // Get inverse of pad MXYZ SACB RLDU
data_reg=Pico.ioports[i+1];
u32 pad = ~PicoPadInt[i]; // Get inverse of pad MXYZ SACB RLDU
u32 value;
// orr the bits, which are set as output
value = data_reg&(Pico.ioports[i+4]|0x80);
if (out_bits & 0x40) // TH
value = pad & 0x3f; // ?1CB RLDU
else
value = ((pad & 0xc0) >> 2) | (pad & 3); // ?0SA 00DU
if (PicoOpt & POPT_6BTN_PAD)
{
int phase = Pico.m.padTHPhase[i];
if(phase == 2 && !(data_reg&0x40)) { // TH
value|=(pad&0xc0)>>2; // ?0SA 0000
return value;
} else if(phase == 3) {
if(data_reg&0x40)
value|=(pad&0x30)|((pad>>8)&0xf); // ?1CB MXYZ
else
value|=((pad&0xc0)>>2)|0x0f; // ?0SA 1111
return value;
}
}
if(data_reg&0x40) // TH
value|=(pad&0x3f); // ?1CB RLDU
else value|=((pad&0xc0)>>2)|(pad&3); // ?0SA 00DU
return value; // will mirror later
value |= out_bits & 0x40;
return value;
}
#ifndef _ASM_MEMORY_C
static u32 read_pad_6btn(int i, u32 out_bits)
{
u32 pad = ~PicoPadInt[i]; // Get inverse of pad MXYZ SACB RLDU
int phase = Pico.m.padTHPhase[i];
u32 value;
static u32 io_ports_read(u32 a)
if (phase == 2 && !(out_bits & 0x40)) {
value = (pad & 0xc0) >> 2; // ?0SA 0000
goto out;
}
else if(phase == 3) {
if (out_bits & 0x40)
return (pad & 0x30) | ((pad >> 8) & 0xf); // ?1CB MXYZ
else
return ((pad & 0xc0) >> 2) | 0x0f; // ?0SA 1111
goto out;
}
if (out_bits & 0x40) // TH
value = pad & 0x3f; // ?1CB RLDU
else
value = ((pad & 0xc0) >> 2) | (pad & 3); // ?0SA 00DU
out:
value |= out_bits & 0x40;
return value;
}
static u32 read_nothing(int i, u32 out_bits)
{
return 0xff;
}
typedef u32 (port_read_func)(int index, u32 out_bits);
static port_read_func *port_readers[3] = {
read_pad_3btn,
read_pad_3btn,
read_nothing
};
static NOINLINE u32 port_read(int i)
{
u32 data_reg = Pico.ioports[i + 1];
u32 ctrl_reg = Pico.ioports[i + 4] | 0x80;
u32 in, out;
out = data_reg & ctrl_reg;
out |= 0x7f & ~ctrl_reg; // pull-ups
in = port_readers[i](i, out);
return (in & ~ctrl_reg) | (data_reg & ctrl_reg);
}
void PicoSetInputDevice(int port, enum input_device device)
{
port_read_func *func;
if (port < 0 || port > 2)
return;
switch (device) {
case PICO_INPUT_PAD_3BTN:
func = read_pad_3btn;
break;
case PICO_INPUT_PAD_6BTN:
func = read_pad_6btn;
break;
default:
func = read_nothing;
break;
}
port_readers[port] = func;
}
NOINLINE u32 io_ports_read(u32 a)
{
u32 d;
a = (a>>1) & 0xf;
switch (a) {
case 0: d = Pico.m.hardware; break; // Hardware value (Version register)
case 1: d = PadRead(0); break;
case 2: d = PadRead(1); break;
case 1: d = port_read(0); break;
case 2: d = port_read(1); break;
case 3: d = port_read(2); break;
default: d = Pico.ioports[a]; break; // IO ports can be used as RAM
}
return d;
}
static void NOINLINE io_ports_write(u32 a, u32 d)
NOINLINE void io_ports_write(u32 a, u32 d)
{
a = (a>>1) & 0xf;
// 6 button gamepad: if TH went from 0 to 1, gamepad changes state
if (1 <= a && a <= 2 && (PicoOpt & POPT_6BTN_PAD))
if (1 <= a && a <= 2)
{
Pico.m.padDelay[a - 1] = 0;
if (!(Pico.ioports[a] & 0x40) && (d & 0x40))
@ -252,8 +309,6 @@ static void NOINLINE io_ports_write(u32 a, u32 d)
Pico.ioports[a] = d;
}
#endif // _ASM_MEMORY_C
void NOINLINE ctl_write_z80busreq(u32 d)
{
d&=1; d^=1;
@ -1177,3 +1232,4 @@ static void z80_mem_setup(void)
#endif
}
// vim:shiftwidth=2:ts=2:expandtab