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addresses are 23-bit, and added alternate loop bit but can't find any game that uses it

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This commit is contained in:
Michaël Banaan Ananas 2013-06-01 14:50:27 +00:00
parent 6046a3af4e
commit b95f6aa480
2 changed files with 12 additions and 4 deletions
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15
src/emu/sound/ymf271.c
View File

@ -10,6 +10,11 @@
MAME and properly licensed derivatives, it is available under the
terms of the GNU Lesser General Public License (LGPL), version 2.1.
You may read the LGPL at http://www.gnu.org/licenses/lgpl.html
TODO:
- A/L bit (alternate loop)
- EN and EXT Out
- oh, and a lot more...
*/
#include "emu.h"
@ -1252,7 +1257,8 @@ void ymf271_device::ymf271_write_pcm(int data)
break;
case 2:
slot->startaddr &= ~0xff0000;
slot->startaddr |= data<<16;
slot->startaddr |= (data & 0x7f)<<16;
slot->altloop = (data & 0x80) ? 1 : 0;
break;
case 3:
slot->endaddr &= ~0xff;
@ -1264,7 +1270,7 @@ void ymf271_device::ymf271_write_pcm(int data)
break;
case 5:
slot->endaddr &= ~0xff0000;
slot->endaddr |= data<<16;
slot->endaddr |= (data & 0x7f)<<16;
break;
case 6:
slot->loopaddr &= ~0xff;
@ -1276,7 +1282,7 @@ void ymf271_device::ymf271_write_pcm(int data)
break;
case 8:
slot->loopaddr &= ~0xff0000;
slot->loopaddr |= data<<16;
slot->loopaddr |= (data & 0x7f)<<16;
break;
case 9:
slot->fs = data & 0x3;
@ -1364,7 +1370,7 @@ void ymf271_device::ymf271_write_timer(int data)
m_timerA &= 0x00ff;
if ((data & 0x3) != 0x3)
{
m_timerA |= (data & 0xff)<<8;
m_timerA |= data<<8;
}
}
break;
@ -1623,6 +1629,7 @@ void ymf271_device::init_state()
save_item(NAME(m_slots[i].startaddr), i);
save_item(NAME(m_slots[i].loopaddr), i);
save_item(NAME(m_slots[i].endaddr), i);
save_item(NAME(m_slots[i].altloop), i);
save_item(NAME(m_slots[i].fs), i);
save_item(NAME(m_slots[i].srcnote), i);
save_item(NAME(m_slots[i].srcb), i);

1
src/emu/sound/ymf271.h
View File

@ -64,6 +64,7 @@ private:
UINT32 startaddr;
UINT32 loopaddr;
UINT32 endaddr;
INT8 altloop;
INT8 fs, srcnote, srcb;
INT64 step;