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(MESS) fc100 : seems cassette frequencies are 600/1200, so halved everything.

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Also fixed unreliable loading by initialising some variables.
This commit is contained in:
Robbbert 2014-04-22 10:36:55 +00:00
parent 525db193c1
commit 74f2efb158
2 changed files with 10 additions and 7 deletions
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2
src/lib/formats/fc100_cas.c
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@ -15,7 +15,7 @@ it's all a guess.
#define WAVEENTRY_LOW -32768
#define WAVEENTRY_HIGH 32767
#define FC100_WAV_FREQUENCY 9600
#define FC100_WAV_FREQUENCY 4800
#define FC100_HEADER_BYTES 16
// image size

15
src/mess/drivers/fc100.c
View File

@ -394,14 +394,14 @@ TIMER_DEVICE_CALLBACK_MEMBER( fc100_state::timer_c )
}
if (m_cass_state)
m_cass->output(BIT(m_cass_data[3], 0) ? -1.0 : +1.0); // 2400Hz
m_cass->output(BIT(m_cass_data[3], 0) ? -1.0 : +1.0); // 1200Hz
else
m_cass->output(BIT(m_cass_data[3], 1) ? -1.0 : +1.0); // 1200Hz
m_cass->output(BIT(m_cass_data[3], 1) ? -1.0 : +1.0); // 600Hz
}
TIMER_DEVICE_CALLBACK_MEMBER( fc100_state::timer_p)
{
/* cassette - turn 1200/2400Hz to a bit */
/* cassette - turn 600/1200Hz to a bit */
m_cass_data[1]++;
UINT8 cass_ws = (m_cass->input() > +0.03) ? 1 : 0;
@ -472,6 +472,9 @@ 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;
}
static MACHINE_CONFIG_START( fc100, fc100_state )
@ -498,10 +501,10 @@ static MACHINE_CONFIG_START( fc100, fc100_state )
MCFG_CASSETTE_ADD("cassette", fc100_cassette_interface)
MCFG_DEVICE_ADD("uart", I8251, 0)
MCFG_I8251_TXD_HANDLER(WRITELINE(fc100_state, txdata_callback))
MCFG_DEVICE_ADD("uart_clock", CLOCK, XTAL_4_9152MHz/16/16) // gives 19200
MCFG_DEVICE_ADD("uart_clock", CLOCK, XTAL_4_9152MHz/16/16/2) // gives 9600
MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(fc100_state, uart_clock_w))
MCFG_TIMER_DRIVER_ADD_PERIODIC("timer_c", fc100_state, timer_c, attotime::from_hz(4800)) // cass write
MCFG_TIMER_DRIVER_ADD_PERIODIC("timer_p", fc100_state, timer_p, attotime::from_hz(40000)) // cass read
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
MACHINE_CONFIG_END