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M50753: Add both IRQ lines and route them to the correct interrupt bits. [R. Belmont]

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This commit is contained in:
arbee 2020-10-19 21:51:56 -04:00
parent f71ab9fff8
commit 72e27f9e02
2 changed files with 61 additions and 13 deletions
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64
src/devices/cpu/m6502/m5074x.cpp
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@ -1,7 +1,7 @@
// license:BSD-3-Clause // license:BSD-3-Clause
// copyright-holders:R. Belmont, Olivier Galibert // copyright-holders:R. Belmont, Olivier Galibert
/* /*
Mitsubishi M5074x 8-bit microcontroller family Mitsubishi M5074x/5075x 8-bit microcontroller family
*/ */
#include "emu.h" #include "emu.h"
@ -11,19 +11,19 @@
// MACROS / CONSTANTS // MACROS / CONSTANTS
//************************************************************************** //**************************************************************************
#define IRQ_CNTRREQ (0x80) static constexpr u8 IRQ_CNTRREQ = 0x80;
#define IRQ_CNTRENA (0x40) static constexpr u8 IRQ_CNTRENA = 0x40;
#define IRQ_TMR1REQ (0x20) static constexpr u8 IRQ_TMR1REQ = 0x20;
#define IRQ_TMR1ENA (0x10) static constexpr u8 IRQ_TMR1ENA = 0x10;
#define IRQ_TMR2REQ (0x08) static constexpr u8 IRQ_TMR2REQ = 0x08;
#define IRQ_TMR2ENA (0x04) static constexpr u8 IRQ_TMR2ENA = 0x04;
#define IRQ_INTREQ (0x02) static constexpr u8 IRQ_INTREQ = 0x02;
#define IRQ_INTENA (0x01) static constexpr u8 IRQ_INTENA = 0x01;
#define TMRC_TMRXREQ (0x80) static constexpr u8 TMRC_TMRXREQ = 0x80;
#define TMRC_TMRXENA (0x40) static constexpr u8 TMRC_TMRXENA = 0x40;
#define TMRC_TMRXHLT (0x20) static constexpr u8 TMRC_TMRXHLT = 0x20;
#define TMRC_TMRXMDE (0x0c) static constexpr u8 TMRC_TMRXMDE = 0x0c;
//************************************************************************** //**************************************************************************
// DEVICE DEFINITIONS // DEVICE DEFINITIONS
@ -568,3 +568,41 @@ void m50753_device::pwm_control_w(uint8_t data)
{ {
m_pwm_enabled = BIT(data, 0); m_pwm_enabled = BIT(data, 0);
} }
// interrupt bits on 50753 are slightly different from the 740/741.
static constexpr u8 IRQ_50753_INT1REQ = 0x80;
static constexpr u8 IRQ_50753_INT2REQ = 0x02;
void m50753_device::execute_set_input(int inputnum, int state)
{
switch (inputnum)
{
case M50753_INT1_LINE:
if (state == ASSERT_LINE)
{
m_intctrl |= IRQ_50753_INT1REQ;
}
else
{
m_intctrl &= ~IRQ_50753_INT1REQ;
}
break;
case M50753_INT2_LINE:
if (state == ASSERT_LINE)
{
m_intctrl |= IRQ_50753_INT2REQ;
}
else
{
m_intctrl &= ~IRQ_50753_INT2REQ;
}
break;
case M5074X_SET_OVERFLOW: // the base 740 class can handle this
m740_device::execute_set_input(M740_SET_OVERFLOW, state);
break;
}
recalc_irqs();
}

10
src/devices/cpu/m6502/m5074x.h
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@ -107,6 +107,14 @@ class m50753_device : public m5074x_device
public: public:
m50753_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); m50753_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
enum
{
M50753_INT1_LINE = INPUT_LINE_IRQ0,
M50753_INT2_LINE = INPUT_LINE_IRQ1,
M5074X_SET_OVERFLOW = M740_SET_OVERFLOW
};
template <std::size_t Bit> auto ad_in() { return m_ad_in[Bit].bind(); } template <std::size_t Bit> auto ad_in() { return m_ad_in[Bit].bind(); }
protected: protected:
@ -116,6 +124,8 @@ protected:
virtual void device_start() override; virtual void device_start() override;
virtual void device_reset() override; virtual void device_reset() override;
virtual void execute_set_input(int inputnum, int state) override;
private: private:
void m50753_map(address_map &map); void m50753_map(address_map &map);