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tms99xx: Introduced symbolic constants for interrupt lines. Added a

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special RESET line handled by the CPU, not by the emulator core. 
tms9928a/v9938: Introduced dedicated RESET line. [Michael Zapf]
This commit is contained in:
Michael Zapf 2012-07-12 21:38:53 +00:00
parent d3764b38d2
commit 265249e1ae
6 changed files with 82 additions and 30 deletions
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27
src/emu/cpu/tms9900/tms9900.c
View File

@ -1154,7 +1154,7 @@ void tms99xx_device::execute_run()
}
}
}
} while (m_icount>0);
} while (m_icount>0 && !m_reset);
if (VERBOSE>6) LOG("tms99xx: cycles expired; will return soon.\n");
}
@ -1165,22 +1165,29 @@ void tms99xx_device::execute_run()
*/
void tms99xx_device::execute_set_input(int irqline, int state)
{
if (irqline == INPUT_LINE_NMI)
if (irqline==INPUT_LINE_99XX_RESET && state==ASSERT_LINE)
{
m_load_state = (state==ASSERT_LINE);
m_irq_level = -1;
m_reset = true;
}
else
{
m_irq_state = (state==ASSERT_LINE);
if (state==ASSERT_LINE)
if (irqline == INPUT_LINE_NMI)
{
m_irq_level = get_intlevel(state);
if (VERBOSE>6) LOG("tms99xx: interrupt line %d = %d, level=%d, ST=%04x\n", irqline, state, m_irq_level, ST);
m_load_state = (state==ASSERT_LINE);
m_irq_level = -1;
}
else
{
if (VERBOSE>6) LOG("tms99xx: cleared interrupt line %d\n", irqline);
m_irq_state = (state==ASSERT_LINE);
if (state==ASSERT_LINE)
{
m_irq_level = get_intlevel(state);
if (VERBOSE>6) LOG("tms99xx: interrupt line %d = %d, level=%d, ST=%04x\n", irqline, state, m_irq_level, ST);
}
else
{
if (VERBOSE>6) LOG("tms99xx: cleared interrupt line %d\n", irqline);
}
}
}
}
@ -2543,7 +2550,7 @@ UINT32 tms99xx_device::execute_max_cycles() const
UINT32 tms99xx_device::execute_input_lines() const
{
return 1;
return 2;
}
// clocks to cycles, cycles to clocks = id

16
src/emu/cpu/tms9900/tms9900.h
View File

@ -47,6 +47,22 @@
#include "emu.h"
#include "debugger.h"
/*
Define symbols for interrupt lines.
We use a separate RESET signal which is not captured by the core.
Caution: Check irqline in set_input_line of each driver using this CPU.
Values have changed. Use these symbols instead.
*/
enum
{
INPUT_LINE_99XX_RESET = 0,
INPUT_LINE_99XX_INTREQ = 1,
INPUT_LINE_99XX_INT1 = 2,
INPUT_LINE_99XX_INT4 = 3
};
enum
{
LOAD_INT = -1,

47
src/emu/cpu/tms9900/tms9995.c
View File

@ -1118,7 +1118,7 @@ void tms9995_device::execute_run()
}
}
}
} while (m_icount>0);
} while (m_icount>0 && !m_reset);
if (VERBOSE>5) LOG("tms9995: cycles expired; will return soon.\n");
}
@ -1133,37 +1133,44 @@ void tms9995_device::execute_run()
*/
void tms9995_device::execute_set_input(int irqline, int state)
{
if (irqline == INPUT_LINE_NMI)
if (irqline==INPUT_LINE_99XX_RESET && state==ASSERT_LINE)
{
m_nmi_active = (state==ASSERT_LINE);
if (VERBOSE>3) LOG("tms9995: NMI interrupt line state=%d\n", state);
m_reset = true;
}
else
{
if (irqline == 1)
if (irqline == INPUT_LINE_NMI)
{
m_int1_active = m_flag[2] = (state==ASSERT_LINE);
if (VERBOSE>3) LOG("tms9995: Line INT1 state=%d\n", state);
m_nmi_active = (state==ASSERT_LINE);
if (VERBOSE>3) LOG("tms9995: NMI interrupt line state=%d\n", state);
}
else
{
if (irqline == 4)
if (irqline == INPUT_LINE_99XX_INT1)
{
if (VERBOSE>3) LOG("tms9995: Line INT4/EC state=%d\n", state);
if (m_flag[0]==false)
{
if (VERBOSE>7) LOG("tms9995: set as interrupt\n");
m_int4_active = m_flag[4] = (state==ASSERT_LINE);
}
else
{
if (VERBOSE>7) LOG("tms9995: set as event count\n");
trigger_decrementer();
}
m_int1_active = m_flag[2] = (state==ASSERT_LINE);
if (VERBOSE>3) LOG("tms9995: Line INT1 state=%d\n", state);
}
else
{
if (VERBOSE>0) LOG("tms9995: Accessed invalid interrupt line %d\n", irqline);
if (irqline == INPUT_LINE_99XX_INT4)
{
if (VERBOSE>3) LOG("tms9995: Line INT4/EC state=%d\n", state);
if (m_flag[0]==false)
{
if (VERBOSE>7) LOG("tms9995: set as interrupt\n");
m_int4_active = m_flag[4] = (state==ASSERT_LINE);
}
else
{
if (VERBOSE>7) LOG("tms9995: set as event count\n");
trigger_decrementer();
}
}
else
{
if (VERBOSE>0) LOG("tms9995: Accessed invalid interrupt line %d\n", irqline);
}
}
}
}

16
src/emu/cpu/tms9900/tms9995.h
View File

@ -11,6 +11,22 @@
#include "emu.h"
#include "debugger.h"
/*
Define symbols for interrupt lines.
We use a separate RESET signal which is not captured by the core.
Caution: Check irqline in set_input_line of each driver using this CPU.
Values have changed. Use these symbols instead.
*/
enum
{
INPUT_LINE_99XX_RESET = 0,
INPUT_LINE_99XX_INTREQ = 1,
INPUT_LINE_99XX_INT1 = 2,
INPUT_LINE_99XX_INT4 = 3
};
enum
{
TI990_10_ID = 1,

3
src/emu/video/tms9928a.h
View File

@ -107,6 +107,9 @@ public:
UINT32 screen_update( screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect );
bitmap_ind16 &get_bitmap() { return m_tmpbmp; }
/* RESET pin */
void reset_line(int state) { if (state==ASSERT_LINE) device_reset(); }
protected:
// device-level overrides
virtual void device_config_complete();

3
src/emu/video/v9938.h
View File

@ -96,6 +96,9 @@ public:
static void static_set_vram_size(device_t &device, UINT32 vram_size);
static void static_set_interrupt_callback(device_t &device, v99x8_interrupt_delegate callback, const char *device_name);
/* RESET pin */
void reset_line(int state) { if (state==ASSERT_LINE) device_reset(); }
protected:
const address_space_config m_space_config;
address_space* m_vram_space;