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ports A and B are shared

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This commit is contained in:
Michaël Banaan Ananas 2011-08-09 05:01:57 +00:00
parent eb5cbdb4d0
commit 9c40b42a6f
1 changed files with 10 additions and 15 deletions
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25
src/emu/sound/ymf278b.c
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@ -129,7 +129,7 @@ typedef struct
emu_timer *timer_a, *timer_b;
int irq_line;
UINT8 port_A, port_B, port_C;
UINT8 port_C, port_AB, lastport;
void (*irq_callback)(device_t *, int);
device_t *device;
@ -761,23 +761,17 @@ WRITE8_DEVICE_HANDLER( ymf278b_w )
switch (offset)
{
case 0:
case 2:
ymf278b_timer_busy_reset(chip, 0);
chip->port_A = data;
chip->port_AB = data;
chip->lastport = offset>>1 & 1;
break;
case 1:
ymf278b_timer_busy_reset(chip, 0);
ymf278b_A_w(device->machine(), chip, chip->port_A, data);
break;
case 2:
ymf278b_timer_busy_reset(chip, 0);
chip->port_B = data;
break;
case 3:
ymf278b_timer_busy_reset(chip, 0);
ymf278b_B_w(chip, chip->port_B, data);
if (chip->lastport) ymf278b_B_w(chip, chip->port_AB, data);
else ymf278b_A_w(device->machine(), chip, chip->port_AB, data);
break;
case 4:
@ -859,7 +853,8 @@ static DEVICE_RESET( ymf278b )
ymf278b_C_w(chip, i, 0, 1);
ymf278b_C_w(chip, 0xf8, 0x1b, 1);
chip->port_A = chip->port_B = chip->port_C = 0;
chip->port_AB = chip->port_C = 0;
chip->lastport = 0;
chip->memadr = 0;
// init/silence channels
@ -928,9 +923,9 @@ static void ymf278b_register_save_state(device_t *device, YMF278BChip *chip)
device->save_item(NAME(chip->enable));
device->save_item(NAME(chip->current_irq));
device->save_item(NAME(chip->irq_line));
device->save_item(NAME(chip->port_A));
device->save_item(NAME(chip->port_B));
device->save_item(NAME(chip->port_AB));
device->save_item(NAME(chip->port_C));
device->save_item(NAME(chip->lastport));
for (i = 0; i < 24; ++i)
{