void snes_state::hirq_tick()
{
// latch the counters and pull IRQ
// (don't need to switch to the 65816 context, we don't do anything dependant on it)
m_ppu.latch_counters(machine());
SNES_CPU_REG(TIMEUP) = 0x80; /* Indicate that irq occurred */
m_maincpu->set_input_line(G65816_LINE_IRQ, ASSERT_LINE);
// don't happen again
m_hirq_timer->adjust(attotime::never);
}
PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_NAME("Toggle Mode 7 draw") PORT_TOGGLE
#endif
INPUT_PORTS_END
/*************************************
*
* Input callbacks
*
*************************************/
WRITE8_MEMBER(snes_console_state::io_read)
{
// is automatic reading on? if so, read 16bits from oldjoy1/2
if (SNES_CPU_REG(NMITIMEN) & 1)
{
UINT16 joy1 = 0, joy2 = 0, joy3 = 0, joy4 = 0;
m_ctrl1->port_poll();
m_ctrl2->port_poll();
for (int i = 0; i < 16; i++)
{
joy1 |= ((m_ctrl1->read_pin4() & 1) << (15 - i));
joy2 |= ((m_ctrl2->read_pin4() & 1) << (15 - i));
joy3 |= ((m_ctrl1->read_pin5() & 1) << (15 - i));
joy4 |= ((m_ctrl2->read_pin5() & 1) << (15 - i));
}
SNES_CPU_REG(JOY1L) = (joy1 & 0x00ff) >> 0;
SNES_CPU_REG(JOY1H) = (joy1 & 0xff00) >> 8;
SNES_CPU_REG(JOY2L) = (joy2 & 0x00ff) >> 0;
SNES_CPU_REG(JOY2H) = (joy2 & 0xff00) >> 8;
SNES_CPU_REG(JOY3L) = (joy3 & 0x00ff) >> 0;
SNES_CPU_REG(JOY3H) = (joy3 & 0xff00) >> 8;
SNES_CPU_REG(JOY4L) = (joy4 & 0x00ff) >> 0;
SNES_CPU_REG(JOY4H) = (joy4 & 0xff00) >> 8;
}
WRITE8_MEMBER( sfcbox_state::port_80_w )
{
/*
x--- ---- (often same as bit5)
-x-- ---- Unknown/unused
--x- ---- ?? PLENTY used (often same as bit7)
---x ---- ?? pulsed while [C094] is nonzero (0370h timer0 steps)
---- x--- Unknown/unused
---- -x-- SNES Transfer DATA to SNES (Bit1 of WRIO/RDIO on SNES side)
---- --x- SNES Transfer CLOCK to SNES (Bit5 of WRIO/RDIO on SNES side)
---- ---x SNES Transfer STAT to SNES (Bit2 of WRIO/RDIO on SNES side)
*/
SNES_CPU_REG(WRIO) = ((data & 4) >> 1) | (SNES_CPU_REG(WRIO) & ~0x02); // DATA
SNES_CPU_REG(WRIO) = ((data & 2) << 4) | (SNES_CPU_REG(WRIO) & ~0x20); // CLOCK
SNES_CPU_REG(WRIO) = ((data & 1) << 2) | (SNES_CPU_REG(WRIO) & ~0x04); // STAT
}
READ8_MEMBER( sfcbox_state::port_81_r )
{
/*
x--- ---- Vblank, Vsync, or Whatever flag (must toggle on/off at whatever speed)
-x-- ---- Int1 Request (Joypad is/was accessed by SNES or so?) (0=IRQ, 1=No)
--x- ---- Unknown/unused ;/(for "joy2/slot1" or so, use [A0].4-5)
---x ---- Unknown/unused ;\joy1/slot0 or so, used by an UNUSED function (08A0h)
---- x--- Boot mode or so (maybe a jumper, or watchdog-flag, or Bit0 of WRIO/RDIO?)
---- -x-- SNES Transfer DATA from SNES (Bit4 of WRIO/RDIO on SNES side)
---- --x- SNES Transfer ACK from SNES (Bit3 of WRIO/RDIO on SNES side)
---- ---x Int0 Request (Coin-Input, Low for 44ms..80ms) (0=IRQ, 1=No)
