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Parallel ports: Fix EPP-related ports handling, appears to fix a reported sound regression.

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OBattler
2025-07-07 03:07:22 +02:00
parent ef977aec45
commit 04ae339ba1
4 changed files with 62 additions and 32 deletions
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14
src/sio/sio_pc87306.c
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@@ -123,6 +123,8 @@ lpt1_handler(pc87306_t *dev)
uint8_t lpt_irq = LPT2_IRQ;
uint8_t lpt_dma = ((dev->regs[0x18] & 0x06) >> 1);
lpt1_remove();
if (lpt_dma == 0x00)
lpt_dma = 0xff;
@@ -157,17 +159,17 @@ lpt1_handler(pc87306_t *dev)
if (dev->regs[0x1b] & 0x10)
lpt_irq = (dev->regs[0x1b] & 0x20) ? 7 : 5;
lpt_set_ext(0, !!(dev->regs[0x02] & 0x80));
lpt_set_epp(0, !!(dev->regs[0x04] & 0x01));
lpt_set_ecp(0, !!(dev->regs[0x04] & 0x04));
if (lpt_port)
lpt1_setup(lpt_port);
lpt1_irq(lpt_irq);
lpt_port_dma(0, lpt_dma);
lpt_set_ext(0, !!(dev->regs[0x02] & 0x80));
lpt_set_epp(0, !!(dev->regs[0x04] & 0x01));
lpt_set_ecp(0, !!(dev->regs[0x04] & 0x04));
}
static void
@@ -386,7 +388,7 @@ pc87306_write(uint16_t port, uint8_t val, void *priv)
if (valxor & 0x70) {
lpt1_remove();
if (!(val & 0x40))
dev->regs[0x19] = 0xEF;
dev->regs[0x19] = 0xef;
if ((dev->regs[0x00] & 1) && !(dev->regs[0x02] & 1))
lpt1_handler(dev);
}