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hp64k: periodic interrupt added

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This commit is contained in:
fulivi 2015-06-12 11:17:19 +02:00
parent 9fc4731399
commit 6360c43ba7
1 changed files with 28 additions and 1 deletions
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29
src/mess/drivers/hp64k.c
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@ -10,7 +10,6 @@
//
// TODO:
// - Slot selection mechanism & low 32KW RAM
// - Periodic interrupt
// - Beeper
// - Various DIP switches
// - Floppy I/F
@ -52,6 +51,9 @@ public:
TIMER_DEVICE_CALLBACK_MEMBER(hp64k_kb_scan);
DECLARE_READ16_MEMBER(hp64k_kb_r);
TIMER_DEVICE_CALLBACK_MEMBER(hp64k_line_sync);
DECLARE_READ16_MEMBER(hp64k_deltat_r);
DECLARE_WRITE16_MEMBER(hp64k_deltat_w);
private:
required_device<hp_5061_3011_cpu_device> m_cpu;
required_device<i8275_device> m_crtc;
@ -89,6 +91,9 @@ static ADDRESS_MAP_START(cpu_io_map , AS_IO , 16 , hp64k_state)
// PA = 0, IC = [0..3]
// Keyboard input
AM_RANGE(HP_MAKE_IOADDR(0 , 0) , HP_MAKE_IOADDR(0 , 3)) AM_READ(hp64k_kb_r)
// PA = 2, IC = [0..3]
// Line sync interrupt clear/watchdog reset
AM_RANGE(HP_MAKE_IOADDR(2 , 0) , HP_MAKE_IOADDR(2 , 3)) AM_READWRITE(hp64k_deltat_r , hp64k_deltat_w)
// PA = 7, IC = 2
// Rear-panel switches
AM_RANGE(HP_MAKE_IOADDR(7 , 2) , HP_MAKE_IOADDR(7 , 2)) AM_READ(hp64k_rear_sw_r)
@ -280,6 +285,25 @@ READ16_MEMBER(hp64k_state::hp64k_kb_r)
return ret;
}
TIMER_DEVICE_CALLBACK_MEMBER(hp64k_state::hp64k_line_sync)
{
BIT_SET(m_irl_pending , 2);
hp64k_update_irl();
}
READ16_MEMBER(hp64k_state::hp64k_deltat_r)
{
BIT_CLR(m_irl_pending , 2);
hp64k_update_irl();
return 0;
}
WRITE16_MEMBER(hp64k_state::hp64k_deltat_w)
{
BIT_CLR(m_irl_pending , 2);
hp64k_update_irl();
}
static INPUT_PORTS_START(hp64k)
// Keyboard is arranged in a 8 x 16 matrix. Of the 128 possible positions, only 77 are used.
// For key arrangement on the matrix, see [1] pg 334
@ -435,6 +459,9 @@ static MACHINE_CONFIG_START(hp64k , hp64k_state)
// Actual keyboard refresh rate should be between 1 and 2 kHz
MCFG_TIMER_DRIVER_ADD_PERIODIC("kb_timer" , hp64k_state , hp64k_kb_scan , attotime::from_hz(100))
// Line sync timer. A line frequency of 60 Hz is assumed.
MCFG_TIMER_DRIVER_ADD_PERIODIC("linesync_timer" , hp64k_state , hp64k_line_sync , attotime::from_hz(60))
// Clock = 25 MHz / 9 * (112/114)
MCFG_DEVICE_ADD("crtc" , I8275 , 2729045)
MCFG_I8275_CHARACTER_WIDTH(9)