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mc1502: fix FDD motor control (github #6613)

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This commit is contained in:
MetalliC 2020-05-04 04:16:47 +03:00
parent 065410f825
commit aec8595d4d
2 changed files with 29 additions and 18 deletions
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44
src/devices/bus/isa/mc1502_fdc.cpp
View File

@ -70,13 +70,30 @@ TIMER_CALLBACK_MEMBER(mc1502_fdc_device::motor_callback)
motor_on = 0;
}
void mc1502_fdc_device::motors_onoff()
{
floppy_image_device *floppy0 = m_fdc->subdevice<floppy_connector>("0")->get_device();
floppy_image_device *floppy1 = m_fdc->subdevice<floppy_connector>("1")->get_device();
if (motor_on)
{
// bits 2, 3 -- motor on (drive 0, 1)
floppy0->mon_w(!(m_control & 4));
floppy1->mon_w(!(m_control & 8));
}
else
{
floppy0->mon_w(ASSERT_LINE);
floppy1->mon_w(ASSERT_LINE);
}
}
uint8_t mc1502_fdc_device::mc1502_wd17xx_aux_r()
{
uint8_t data;
data = 0;
return data;
motor_timer->adjust(attotime::from_msec(3000));
motor_on = 1;
motors_onoff();
return 0;
}
void mc1502_fdc_device::mc1502_wd17xx_aux_w(uint8_t data)
@ -86,24 +103,15 @@ void mc1502_fdc_device::mc1502_wd17xx_aux_w(uint8_t data)
floppy_image_device *floppy = ((data & 0x10) ? floppy1 : floppy0);
// master reset
if ((data & 1) == 0)
m_fdc->reset();
m_fdc->mr_w(data & 1);
m_fdc->set_floppy(floppy);
// SIDE ONE
floppy->ss_w((data & 2) ? 1 : 0);
// bits 2, 3 -- motor on (drive 0, 1)
// the schematic appears to show the motor lines connected, if they aren't then motor_on doesn't work correctly
floppy0->mon_w(!(data & 12));
floppy1->mon_w(!(data & 12));
if (data & 12)
{
motor_timer->adjust(attotime::from_msec(3000));
motor_on = 1;
}
m_control = data;
motors_onoff();
}
/*
@ -191,6 +199,7 @@ mc1502_fdc_device::mc1502_fdc_device(const machine_config &mconfig, const char *
, device_isa8_card_interface(mconfig, *this)
, m_fdc(*this, "fdc")
, motor_on(0)
, m_control(0)
, motor_timer(nullptr)
, m_cpu(*this, finder_base::DUMMY_TAG)
{
@ -214,4 +223,5 @@ void mc1502_fdc_device::device_start()
motor_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(mc1502_fdc_device::motor_callback),this));
motor_on = 0;
m_control = 0;
}

3
src/devices/bus/isa/mc1502_fdc.h
View File

@ -51,9 +51,10 @@ private:
required_device<fd1793_device> m_fdc;
int motor_on;
u8 m_control;
emu_timer *motor_timer;
required_device<cpu_device> m_cpu;
void motors_onoff();
public:
void mc1502_wd17xx_aux_w(uint8_t data);
uint8_t mc1502_wd17xx_aux_r();