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Fixed I8255 interrupt enable. [Curt Coder]

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This commit is contained in:
Curt Coder 2011-04-27 22:48:19 +00:00
parent c2dac01d33
commit a8d41ae349
1 changed files with 35 additions and 48 deletions
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83
src/emu/machine/i8255.c
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@ -50,13 +50,13 @@ enum
};
#define I8255A_CONTROL_PORT_C_LOWER_INPUT 0x01
#define I8255A_CONTROL_PORT_B_INPUT 0x02
#define I8255A_CONTROL_GROUP_B_MODE_1 0x04
#define I8255A_CONTROL_PORT_C_UPPER_INPUT 0x08
#define I8255A_CONTROL_PORT_A_INPUT 0x10
#define I8255A_CONTROL_GROUP_A_MODE_MASK 0x60
#define I8255A_CONTROL_MODE_SET 0x80
#define CONTROL_PORT_C_LOWER_INPUT 0x01
#define CONTROL_PORT_B_INPUT 0x02
#define CONTROL_GROUP_B_MODE_1 0x04
#define CONTROL_PORT_C_UPPER_INPUT 0x08
#define CONTROL_PORT_A_INPUT 0x10
#define CONTROL_GROUP_A_MODE_MASK 0x60
#define CONTROL_MODE_SET 0x80
@ -85,36 +85,19 @@ inline void i8255_device::check_interrupt(int port)
switch (port_mode(port))
{
case MODE_INPUT:
if (m_inte[port] && m_ibf[port])
{
if (LOG) logerror("I8255 Port %c INTR: 1\n", 'A' + port);
m_intr[port] = 1;
}
set_intr(port, (m_inte[port] && m_ibf[port]));
break;
case MODE_OUTPUT:
if (m_inte[port] && m_obf[port])
{
if (LOG) logerror("I8255 Port %c INTR: 1\n", 'A' + port);
m_intr[port] = 1;
}
set_intr(port, (m_inte[port] && m_obf[port]));
break;
}
break;
case MODE_2:
if ((m_inte1 && m_obf[port]) || (m_inte2 && m_ibf[port]))
{
if (LOG) logerror("I8255 Port %c INTR: 1\n", 'A' + port);
m_intr[port] = 1;
}
set_intr(port, ((m_inte1 && m_obf[port]) || (m_inte2 && m_ibf[port])));
break;
}
output_pc();
}
@ -124,7 +107,7 @@ inline void i8255_device::check_interrupt(int port)
inline void i8255_device::set_ibf(int port, int state)
{
if (LOG) logerror("I8255 Port %c IBF: %u\n", 'A' + port, state);
if (LOG) logerror("I8255 '%s' Port %c IBF: %u\n", tag(), 'A' + port, state);
m_ibf[port] = state;
@ -138,7 +121,7 @@ inline void i8255_device::set_ibf(int port, int state)
inline void i8255_device::set_obf(int port, int state)
{
if (LOG) logerror("I8255 Port %c OBF: %u\n", 'A' + port, state);
if (LOG) logerror("I8255 '%s' Port %c OBF: %u\n", tag(), 'A' + port, state);
m_obf[port] = state;
@ -152,7 +135,7 @@ inline void i8255_device::set_obf(int port, int state)
inline void i8255_device::set_inte(int port, int state)
{
if (LOG) logerror("I8255 Port %c INTE: %u\n", 'A' + port, state);
if (LOG) logerror("I8255 '%s' Port %c INTE: %u\n", tag(), 'A' + port, state);
m_inte[port] = state;
@ -166,7 +149,7 @@ inline void i8255_device::set_inte(int port, int state)
inline void i8255_device::set_inte1(int state)
{
if (LOG) logerror("I8255 Port A INTE1: %u\n", state);
if (LOG) logerror("I8255 '%s' Port A INTE1: %u\n", tag(), state);
m_inte1 = state;
@ -180,7 +163,7 @@ inline void i8255_device::set_inte1(int state)
inline void i8255_device::set_inte2(int state)
{
if (LOG) logerror("I8255 Port A INTE2: %u\n", state);
if (LOG) logerror("I8255 '%s' Port A INTE2: %u\n", tag(), state);
m_inte2 = state;
@ -194,7 +177,7 @@ inline void i8255_device::set_inte2(int state)
inline void i8255_device::set_intr(int port, int state)
{
if (LOG) logerror("I8255 Port %c INTR: %u\n", 'A' + port, state);
if (LOG) logerror("I8255 '%s' Port %c INTR: %u\n", tag(), 'A' + port, state);
m_intr[port] = state;
@ -213,7 +196,7 @@ inline int i8255_device::group_mode(int group)
switch (group)
{
case GROUP_A:
switch ((m_control & I8255A_CONTROL_GROUP_A_MODE_MASK) >> 5)
switch ((m_control & CONTROL_GROUP_A_MODE_MASK) >> 5)
{
case 0: mode = MODE_0; break;
case 1: mode = MODE_1; break;
@ -222,7 +205,7 @@ inline int i8255_device::group_mode(int group)
break;
case GROUP_B:
mode = m_control & I8255A_CONTROL_GROUP_B_MODE_1 ? MODE_1 : MODE_0;
mode = m_control & CONTROL_GROUP_B_MODE_1 ? MODE_1 : MODE_0;
break;
}
@ -240,8 +223,8 @@ inline int i8255_device::port_mode(int port)
switch (port)
{
case PORT_A: mode = m_control & I8255A_CONTROL_PORT_A_INPUT ? MODE_INPUT : MODE_OUTPUT; break;
case PORT_B: mode = m_control & I8255A_CONTROL_PORT_B_INPUT ? MODE_INPUT : MODE_OUTPUT; break;
case PORT_A: mode = m_control & CONTROL_PORT_A_INPUT ? MODE_INPUT : MODE_OUTPUT; break;
case PORT_B: mode = m_control & CONTROL_PORT_B_INPUT ? MODE_INPUT : MODE_OUTPUT; break;
}
return mode;
@ -254,7 +237,7 @@ inline int i8255_device::port_mode(int port)
inline int i8255_device::port_c_lower_mode()
{
return m_control & I8255A_CONTROL_PORT_C_LOWER_INPUT ? MODE_INPUT : MODE_OUTPUT;
return m_control & CONTROL_PORT_C_LOWER_INPUT ? MODE_INPUT : MODE_OUTPUT;
}
@ -264,7 +247,7 @@ inline int i8255_device::port_c_lower_mode()
inline int i8255_device::port_c_upper_mode()
{
return m_control & I8255A_CONTROL_PORT_C_UPPER_INPUT ? MODE_INPUT : MODE_OUTPUT;
return m_control & CONTROL_PORT_C_UPPER_INPUT ? MODE_INPUT : MODE_OUTPUT;
}
@ -280,6 +263,7 @@ inline int i8255_device::port_c_upper_mode()
i8255_device::i8255_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, I8255, "I8255", tag, owner, clock)
{
m_intr[PORT_A] = m_intr[PORT_B] = 0;
}
@ -715,12 +699,15 @@ void i8255_device::set_mode(UINT8 data)
devcb_call_write8(&m_out_port_func[PORT_A], 0, 0xff);
}
if (LOG) logerror("I8255 '%s' Group A Mode: %u\n", tag(), group_mode(GROUP_A));
if (LOG) logerror("I8255 '%s' Port A Mode: %s\n", tag(), (port_mode(PORT_A) == MODE_OUTPUT) ? "output" : "input");
if (LOG) logerror("I8255 '%s' Port C Upper Mode: %s\n", tag(), (port_c_upper_mode() == MODE_OUTPUT) ? "output" : "input");
if (LOG) logerror("I8255 '%s' Group B Mode: %u\n", tag(), group_mode(GROUP_B));
if (LOG) logerror("I8255 '%s' Port B Mode: %s\n", tag(), (port_mode(PORT_B) == MODE_OUTPUT) ? "output" : "input");
if (LOG) logerror("I8255 '%s' Port C Lower Mode: %s\n", tag(), (port_c_lower_mode() == MODE_OUTPUT) ? "output" : "input");
if (LOG)
{
logerror("I8255 '%s' Group A Mode: %u\n", tag(), group_mode(GROUP_A));
logerror("I8255 '%s' Port A Mode: %s\n", tag(), (port_mode(PORT_A) == MODE_OUTPUT) ? "output" : "input");
logerror("I8255 '%s' Port C Upper Mode: %s\n", tag(), (port_c_upper_mode() == MODE_OUTPUT) ? "output" : "input");
logerror("I8255 '%s' Group B Mode: %u\n", tag(), group_mode(GROUP_B));
logerror("I8255 '%s' Port B Mode: %s\n", tag(), (port_mode(PORT_B) == MODE_OUTPUT) ? "output" : "input");
logerror("I8255 '%s' Port C Lower Mode: %s\n", tag(), (port_c_lower_mode() == MODE_OUTPUT) ? "output" : "input");
}
// group B
m_output[PORT_B] = 0;
@ -841,7 +828,7 @@ READ8_MEMBER( i8255_device::read )
case PORT_C:
data = read_pc();
//if (LOG) logerror("I8255 '%s' Port C Read: %02x\n", tag(), data);
if (LOG) logerror("I8255 '%s' Port C Read: %02x\n", tag(), data);
break;
case CONTROL:
@ -890,7 +877,7 @@ WRITE8_MEMBER( i8255_device::write )
break;
case CONTROL:
if (data & I8255A_CONTROL_MODE_SET)
if (data & CONTROL_MODE_SET)
{
if (LOG) logerror("I8255 '%s' Mode Control Word: %02x\n", tag(), data);
@ -901,7 +888,7 @@ WRITE8_MEMBER( i8255_device::write )
int bit = (data >> 1) & 0x07;
int state = BIT(data, 0);
if (LOG) logerror("I8255 '%s' %s Bit %u\n", tag(), state ? "Set" : "Reset", bit);
if (LOG) logerror("I8255 '%s' %s Port C Bit %u\n", tag(), state ? "Set" : "Reset", bit);
set_pc_bit(bit, state);
}