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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
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@ -10,6 +10,11 @@
MAME and properly licensed derivatives, it is available under the MAME and properly licensed derivatives, it is available under the
terms of the GNU Lesser General Public License (LGPL), version 2.1. 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 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" #include "emu.h"
@ -1252,7 +1257,8 @@ void ymf271_device::ymf271_write_pcm(int data)
break; break;
case 2: case 2:
slot->startaddr &= ~0xff0000; slot->startaddr &= ~0xff0000;
slot->startaddr |= data<<16; slot->startaddr |= (data & 0x7f)<<16;
slot->altloop = (data & 0x80) ? 1 : 0;
break; break;
case 3: case 3:
slot->endaddr &= ~0xff; slot->endaddr &= ~0xff;
@ -1264,7 +1270,7 @@ void ymf271_device::ymf271_write_pcm(int data)
break; break;
case 5: case 5:
slot->endaddr &= ~0xff0000; slot->endaddr &= ~0xff0000;
slot->endaddr |= data<<16; slot->endaddr |= (data & 0x7f)<<16;
break; break;
case 6: case 6:
slot->loopaddr &= ~0xff; slot->loopaddr &= ~0xff;
@ -1276,7 +1282,7 @@ void ymf271_device::ymf271_write_pcm(int data)
break; break;
case 8: case 8:
slot->loopaddr &= ~0xff0000; slot->loopaddr &= ~0xff0000;
slot->loopaddr |= data<<16; slot->loopaddr |= (data & 0x7f)<<16;
break; break;
case 9: case 9:
slot->fs = data & 0x3; slot->fs = data & 0x3;
@ -1364,7 +1370,7 @@ void ymf271_device::ymf271_write_timer(int data)
m_timerA &= 0x00ff; m_timerA &= 0x00ff;
if ((data & 0x3) != 0x3) if ((data & 0x3) != 0x3)
{ {
m_timerA |= (data & 0xff)<<8; m_timerA |= data<<8;
} }
} }
break; break;
@ -1623,6 +1629,7 @@ void ymf271_device::init_state()
save_item(NAME(m_slots[i].startaddr), i); save_item(NAME(m_slots[i].startaddr), i);
save_item(NAME(m_slots[i].loopaddr), i); save_item(NAME(m_slots[i].loopaddr), i);
save_item(NAME(m_slots[i].endaddr), 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].fs), i);
save_item(NAME(m_slots[i].srcnote), i); save_item(NAME(m_slots[i].srcnote), i);
save_item(NAME(m_slots[i].srcb), i); save_item(NAME(m_slots[i].srcb), i);

1
src/emu/sound/ymf271.h
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@ -64,6 +64,7 @@ private:
UINT32 startaddr; UINT32 startaddr;
UINT32 loopaddr; UINT32 loopaddr;
UINT32 endaddr; UINT32 endaddr;
INT8 altloop;
INT8 fs, srcnote, srcb; INT8 fs, srcnote, srcb;
INT64 step; INT64 step;