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(MESS) ti99/8: Removed address masking. (nw)

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This commit is contained in:
Michael Zapf 2013-07-22 15:25:07 +00:00
parent 8ad9a7256f
commit b2b37dd45a
2 changed files with 25 additions and 42 deletions
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64
src/mess/machine/ti99/speech8.c
View File

@ -41,13 +41,10 @@ ti998_spsyn_device::ti998_spsyn_device(const machine_config &mconfig, const char
// ====== This is the version with real timing =======
READ8Z_MEMBER( ti998_spsyn_device::readz )
{
if ((offset & m_select_mask)==m_select_value)
{
m_vsp->wsq_w(TRUE);
m_vsp->rsq_w(FALSE);
*value = m_vsp->read(offset) & 0xff;
if (VERBOSE>4) LOG("speech8: read value = %02x\n", *value);
}
m_vsp->wsq_w(TRUE);
m_vsp->rsq_w(FALSE);
*value = m_vsp->read(offset) & 0xff;
if (VERBOSE>4) LOG("speech8: read value = %02x\n", *value);
}
/*
@ -55,13 +52,10 @@ READ8Z_MEMBER( ti998_spsyn_device::readz )
*/
WRITE8_MEMBER( ti998_spsyn_device::write )
{
if ((offset & m_select_mask)==(m_select_value | 0x0400))
{
m_vsp->rsq_w(m_vsp, TRUE);
m_vsp->wsq_w(m_vsp, FALSE);
if (VERBOSE>4) LOG("speech8: write value = %02x\n", data);
m_vsp->write(offset, data);
}
m_vsp->rsq_w(m_vsp, TRUE);
m_vsp->wsq_w(m_vsp, FALSE);
if (VERBOSE>4) LOG("speech8: write value = %02x\n", data);
m_vsp->write(offset, data);
}
#else
@ -69,12 +63,9 @@ WRITE8_MEMBER( ti998_spsyn_device::write )
READ8Z_MEMBER( ti998_spsyn_device::readz )
{
if ((offset & m_select_mask)==m_select_value)
{
machine().device("maincpu")->execute().adjust_icount(-(18+3)); /* this is just a minimum, it can be more */
*value = m_vsp->status_r(space, offset, 0xff) & 0xff;
if (VERBOSE>4) LOG("speech8: read value = %02x\n", *value);
}
machine().device("maincpu")->execute().adjust_icount(-(18+3)); /* this is just a minimum, it can be more */
*value = m_vsp->status_r(space, offset, 0xff) & 0xff;
if (VERBOSE>4) LOG("speech8: read value = %02x\n", *value);
}
/*
@ -82,26 +73,23 @@ READ8Z_MEMBER( ti998_spsyn_device::readz )
*/
WRITE8_MEMBER( ti998_spsyn_device::write )
{
if ((offset & m_select_mask)==(m_select_value | 0x0400))
machine().device("maincpu")->execute().adjust_icount(-(54+3)); /* this is just an approx. minimum, it can be much more */
/* RN: the stupid design of the tms5220 core means that ready is cleared */
/* when there are 15 bytes in FIFO. It should be 16. Of course, if */
/* it were the case, we would need to store the value on the bus, */
/* which would be more complex. */
if (!m_vsp->readyq_r())
{
machine().device("maincpu")->execute().adjust_icount(-(54+3)); /* this is just an approx. minimum, it can be much more */
attotime time_to_ready = attotime::from_double(m_vsp->time_to_ready());
int cycles_to_ready = machine().device<cpu_device>("maincpu")->attotime_to_cycles(time_to_ready);
if (VERBOSE>8) LOG("speech8: time to ready: %f -> %d\n", time_to_ready.as_double(), (int) cycles_to_ready);
/* RN: the stupid design of the tms5220 core means that ready is cleared */
/* when there are 15 bytes in FIFO. It should be 16. Of course, if */
/* it were the case, we would need to store the value on the bus, */
/* which would be more complex. */
if (!m_vsp->readyq_r())
{
attotime time_to_ready = attotime::from_double(m_vsp->time_to_ready());
int cycles_to_ready = machine().device<cpu_device>("maincpu")->attotime_to_cycles(time_to_ready);
if (VERBOSE>8) LOG("speech8: time to ready: %f -> %d\n", time_to_ready.as_double(), (int) cycles_to_ready);
machine().device("maincpu")->execute().adjust_icount(-cycles_to_ready);
machine().scheduler().timer_set(attotime::zero, FUNC_NULL);
}
if (VERBOSE>4) LOG("speech8: write value = %02x\n", data);
m_vsp->data_w(space, offset, data);
machine().device("maincpu")->execute().adjust_icount(-cycles_to_ready);
machine().scheduler().timer_set(attotime::zero, FUNC_NULL);
}
if (VERBOSE>4) LOG("speech8: write value = %02x\n", data);
m_vsp->data_w(space, offset, data);
}
#endif
@ -132,8 +120,6 @@ void ti998_spsyn_device::device_start()
void ti998_spsyn_device::device_reset()
{
m_select_mask = 0xfc01;
m_select_value = 0x9000;
if (VERBOSE>4) LOG("speech8: reset\n");
}

3
src/mess/machine/ti99/speech8.h
View File

@ -43,9 +43,6 @@ public:
DECLARE_WRITE8_MEMBER( spchrom_load_address );
DECLARE_WRITE8_MEMBER( spchrom_read_and_branch );
int m_select_mask;
int m_select_value;
protected:
virtual void device_start();
virtual void device_reset(void);