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minor cleanups to tms5220 so savestate and member variables are in the same order, and add a missing savestate entry (nw)

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Lord-Nightmare 2015-08-13 13:54:20 -04:00
parent c1a312eea3
commit 3f2b5a229d
2 changed files with 16 additions and 13 deletions
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11
src/emu/sound/tms5220.c
View File

@ -353,6 +353,8 @@ void tms5220_device::set_variant(int variant)
void tms5220_device::register_for_save_states()
{
save_item(NAME(m_variant));
save_item(NAME(m_fifo));
save_item(NAME(m_fifo_head));
save_item(NAME(m_fifo_tail));
@ -796,6 +798,7 @@ void tms5220_device::process(INT16 *buffer, unsigned int size)
#endif
/* if the new frame is a stop frame, set an interrupt and set talk status to 0 */
/** TODO: investigate this later! **/
if (NEW_FRAME_STOP_FLAG == 1)
{
m_talk_status = m_speak_external = 0;
@ -1264,7 +1267,7 @@ void tms5220_device::process_command(unsigned char cmd)
void tms5220_device::parse_frame()
{
int indx, i, rep_flag;
int i, rep_flag;
// We actually don't care how many bits are left in the fifo here; the frame subpart will be processed normally, and any bits extracted 'past the end' of the fifo will be read as zeroes; the fifo being emptied will set the /BE latch which will halt speech exactly as if a stop frame had been encountered (instead of whatever partial frame was read); the same exact circuitry is used for both on the real chip, see us patent 4335277 sheet 16, gates 232a (decode stop frame) and 232b (decode /BE plus DDIS (decode disable) which is active during speak external).
@ -1272,12 +1275,12 @@ void tms5220_device::parse_frame()
has a 2 bit rate preceding it, grab two bits here and store them as the rate; */
if ((TMS5220_HAS_RATE_CONTROL) && (m_c_variant_rate & 0x04))
{
indx = extract_bits(2);
i = extract_bits(2);
#ifdef DEBUG_PARSE_FRAME_DUMP
printbits(indx,2);
printbits(i,2);
fprintf(stderr," ");
#endif
m_IP = reload_table[indx];
m_IP = reload_table[i];
}
else // non-5220C and 5220C in fixed rate mode
m_IP = reload_table[m_c_variant_rate&0x3];

18
src/emu/sound/tms5220.h
View File

@ -172,6 +172,15 @@ private:
UINT8 m_data_register; /* data register, used by read command */
UINT8 m_RDB_flag; /* whether we should read data register or status register */
/* The TMS52xx has two different ways of providing output data: the
analog speaker pin (which was usually used) and the Digital I/O pin.
The internal DAC used to feed the analog pin is only 8 bits, and has the
funny clipping/clamping logic, while the digital pin gives full 10 bit
resolution of the output data.
TODO: add a way to set/reset this other than the FORCE_DIGITAL define
*/
UINT8 m_digital_select;
/* io_ready: page 3 of the datasheet specifies that READY will be asserted until
* data is available or processed by the system.
*/
@ -185,15 +194,6 @@ private:
UINT8 m_read_latch;
UINT8 m_write_latch;
/* The TMS52xx has two different ways of providing output data: the
analog speaker pin (which was usually used) and the Digital I/O pin.
The internal DAC used to feed the analog pin is only 8 bits, and has the
funny clipping/clamping logic, while the digital pin gives full 10 bit
resolution of the output data.
TODO: add a way to set/reset this other than the FORCE_DIGITAL define
*/
UINT8 m_digital_select;
sound_stream *m_stream;
int m_clock;
emu_timer *m_timer_io_ready;