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hp9k_3xx: hook up NMI line to keyboard controller

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Signed-off-by: Sven Schnelle <svens@stackframe.org>
This commit is contained in:
Sven Schnelle 2018-06-19 20:46:32 +02:00 committed by Vas Crabb
parent eba52c5be3
commit e86ab5bd4d
1 changed files with 19 additions and 7 deletions
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26
src/mame/drivers/hp9k_3xx.cpp
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@ -165,7 +165,16 @@ public:
void hp9k3xx_common(address_map &map);
void iocpu_map(address_map &map);
private:
static constexpr uint8_t HIL_CS = 0x01;
static constexpr uint8_t HIL_WE = 0x02;
static constexpr uint8_t HIL_OE = 0x04;
static constexpr uint8_t LATCH_EN = 0x08;
static constexpr uint8_t KBD_RESET = 0x40;
static constexpr uint8_t SN76494_EN = 0x80;
bool m_hil_read;
bool m_kbd_nmi;
uint8_t m_hil_data;
uint8_t m_latch_data;
uint32_t m_lastpc;
@ -208,7 +217,6 @@ void hp9k3xx_state::hp9k3xx_common(address_map &map)
map(0x005f8000, 0x005f800f).rw(PTM6840_TAG, FUNC(ptm6840_device::read), FUNC(ptm6840_device::write)).umask32(0x00ff00ff);
map(0x005f4000, 0x005f400f).ram(); // somehow coprocessor related - bootrom crashes if not present
}
// 9000/310 - has onboard video that the graphics card used in other 3xxes conflicts with
@ -347,6 +355,8 @@ READ8_MEMBER(hp9k3xx_state::gpib_r)
case 2:
/* Address */
data = (m_tms9914->cont_r() ? 0x0 : 0x40) | 0x81;
if (m_kbd_nmi)
data |= 0x04;
break;
}
LOG("gpib_r: %s %02X = %02X\n", machine().describe_context().c_str(), offset, data);
@ -395,12 +405,6 @@ WRITE8_MEMBER(hp9k3xx_state::iocpu_port1_w)
m_hil_data = data;
}
static constexpr uint8_t HIL_CS = 0x01;
static constexpr uint8_t HIL_WE = 0x02;
static constexpr uint8_t HIL_OE = 0x04;
static constexpr uint8_t LATCH_EN = 0x08;
static constexpr uint8_t SN76494_EN = 0x80;
WRITE8_MEMBER(hp9k3xx_state::iocpu_port2_w)
{
if ((data & (HIL_CS|HIL_WE)) == 0)
@ -415,6 +419,14 @@ WRITE8_MEMBER(hp9k3xx_state::iocpu_port2_w)
m_latch_data = m_hil_data;
m_maincpu->set_input_line(M68K_IRQ_1, data & 0x10 ? ASSERT_LINE : CLEAR_LINE);
if (!(data & KBD_RESET)) {
m_maincpu->set_input_line(M68K_IRQ_7, ASSERT_LINE);
m_kbd_nmi = true;
} else {
m_maincpu->set_input_line(M68K_IRQ_7, CLEAR_LINE);
m_kbd_nmi = false;
}
}
READ8_MEMBER(hp9k3xx_state::iocpu_port1_r)