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a little more silence (nw)

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This commit is contained in:
David Haywood 2013-05-02 19:55:39 +00:00
parent a663637e9c
commit 7cc0cb0df3
2 changed files with 78 additions and 2 deletions
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63
src/mame/drivers/bfm_sc5.c
View File

@ -15,6 +15,66 @@
#include "bfm_sc5.lh"
#include "video/awpvid.h"
void bfm_sc5_reset_serial_vfd(running_machine &machine)
{
bfm_sc5_state *state = machine.driver_data<bfm_sc5_state>();
state->m_vfd0->reset();
state->vfd_old_clock = false;
}
void bfm_sc5_write_serial_vfd(running_machine &machine, bool cs, bool clock, bool data)
{
bfm_sc5_state *state = machine.driver_data<bfm_sc5_state>();
// if we're turned on
if ( cs )
{
if ( !state->vfd_enabled )
{
bfm_sc5_reset_serial_vfd(machine);
state->vfd_old_clock = clock;
state->vfd_enabled = true;
}
else
{
// if the clock line changes
if ( clock != state->vfd_old_clock )
{
if ( !clock )
{
//Should move to the internal serial process when DM01 is device-ified
// m_vfd0->shift_data(!data);
state->vfd_ser_value <<= 1;
if (data) state->vfd_ser_value |= 1;
state->vfd_ser_count++;
if ( state->vfd_ser_count == 8 )
{
state->vfd_ser_count = 0;
// if (machine.device("matrix"))
// {
// BFM_dm01_writedata(machine,state->vfd_ser_value);
// }
// else
{
state->m_vfd0->write_char(state->vfd_ser_value);
}
}
}
state->vfd_old_clock = clock;
}
}
}
else
{
state->vfd_enabled = false;
}
}
static ADDRESS_MAP_START( sc5_map, AS_PROGRAM, 32, bfm_sc5_state )
// ROM (max size?)
AM_RANGE(0x00000000, 0x002fffff) AM_ROM
@ -159,6 +219,9 @@ WRITE8_MEMBER( bfm_sc5_state::sc5_10202F0_w )
switch (offset)
{
case 0x0:
bfm_sc5_write_serial_vfd(machine(), (data &0x4)?1:0, (data &0x1)?1:0, (data&0x2) ? 0:1);
if (data&0xf8) printf("%s: sc5_10202F0_w %d - %02x\n", machine().describe_context(), offset, data);
break;
case 0x1:
case 0x2:
case 0x3:

17
src/mame/includes/bfm_sc5.h
View File

@ -6,14 +6,27 @@ class bfm_sc5_state : public driver_device
public:
bfm_sc5_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu")
m_maincpu(*this, "maincpu"),
m_vfd0(*this, "vfd0")
{ }
protected:
public:
// devices
required_device<cpu_device> m_maincpu;
public:
optional_device<bfm_bda_t> m_vfd0;
// serial vfd
int vfd_enabled;
bool vfd_old_clock;
UINT8 vfd_ser_value;
int vfd_ser_count;
DECLARE_DRIVER_INIT(sc5);
DECLARE_WRITE_LINE_MEMBER(bfm_sc5_ym_irqhandler);
DECLARE_READ8_MEMBER( sc5_10202F0_r );