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(MESS) fc100 : keyboard fine-tuning.

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This commit is contained in:
Robbbert 2014-04-22 13:05:03 +00:00
parent f88cfae183
commit 4812efd1c3
1 changed files with 30 additions and 26 deletions
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56
src/mess/drivers/fc100.c
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@ -18,7 +18,7 @@ Test of semigraphic 6
20 FOR I=0 TO 360
30 PSET(128+SIN(I)*90,91-COS(I)*90), 1
40 NEXT
RUN
TODO:
- Cassette frequencies are guesses, need to be verified
@ -85,7 +85,7 @@ private:
UINT8 m_cass_data[4];
bool m_cass_state;
bool m_cassold;
UINT8 m_kbd_count;
bool m_key_pressed;
required_device<cpu_device> m_maincpu;
required_device<mc6847_base_device> m_vdg;
@ -270,6 +270,32 @@ static INPUT_PORTS_START( fc100 )
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )
INPUT_PORTS_END
// The timer frequency controls the auto-repeat delay and speed
TIMER_DEVICE_CALLBACK_MEMBER( fc100_state::timer_k)
{
/* scan the keyboard */
UINT8 i;
char kbdrow[6];
for (i = 0; i < 16; i++)
{
sprintf(kbdrow,"0%X", i);
if ((ioport(kbdrow)->read()) < 255)
{
// IRQ if key pressed
m_key_pressed = 1;
m_maincpu->set_input_line(0, HOLD_LINE);
return;
}
}
if (m_key_pressed) // IRQ for key released
{
m_key_pressed = 0;
m_maincpu->set_input_line(0, CLEAR_LINE);
}
}
//********************* AUDIO **********************************
#if 0
@ -433,28 +459,6 @@ TIMER_DEVICE_CALLBACK_MEMBER( fc100_state::timer_p)
}
}
TIMER_DEVICE_CALLBACK_MEMBER( fc100_state::timer_k)
{
/* scan the keyboard */
UINT8 i;
char kbdrow[6];
for (i = 0; i < 16; i++)
{
sprintf(kbdrow,"0%X", i);
if ((ioport(kbdrow)->read() & 15) < 15)
{
// IRQ if key pressed
m_maincpu->set_input_line(0, HOLD_LINE);
return;
}
}
m_kbd_count++;
// also needs to know if no key pressed
m_maincpu->set_input_line(0, BIT(m_kbd_count, 2) ? HOLD_LINE : CLEAR_LINE);
}
static const cassette_interface fc100_cassette_interface =
{
fc100_cassette_formats,
@ -491,10 +495,10 @@ void fc100_state::machine_start()
void fc100_state::machine_reset()
{
m_p_chargen = memregion("chargen")->base();
m_kbd_count = 0;
m_cass_data[0] = m_cass_data[1] = m_cass_data[2] = m_cass_data[3] = 0;
m_cass_state = 0;
m_cassold = 0;
m_key_pressed = 1; // force irq to be cleared
}
static MACHINE_CONFIG_START( fc100, fc100_state )
@ -525,7 +529,7 @@ static MACHINE_CONFIG_START( fc100, fc100_state )
MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(fc100_state, uart_clock_w))
MCFG_TIMER_DRIVER_ADD_PERIODIC("timer_c", fc100_state, timer_c, attotime::from_hz(2400)) // cass write
MCFG_TIMER_DRIVER_ADD_PERIODIC("timer_p", fc100_state, timer_p, attotime::from_hz(20000)) // cass read
MCFG_TIMER_DRIVER_ADD_PERIODIC("timer_k", fc100_state, timer_k, attotime::from_hz(200)) // keyb scan
MCFG_TIMER_DRIVER_ADD_PERIODIC("timer_k", fc100_state, timer_k, attotime::from_hz(300)) // keyb scan
MACHINE_CONFIG_END
/* ROM definition */