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Mask out serial passthrough MSR bits when in loopback mode, fixes #4217.

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OBattler
2024-02-29 06:46:37 +01:00
parent e95c7a3031
commit 901e2568fe
1 changed files with 4 additions and 1 deletions
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5
src/device/serial.c
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@@ -686,7 +686,10 @@ serial_read(uint16_t addr, void *priv)
serial_update_ints(dev); serial_update_ints(dev);
break; break;
case 6: case 6:
ret = dev->msr | dev->msr_set; if (dev->mctrl & 0x10)
ret = dev->msr;
else
ret = dev->msr | dev->msr_set;
dev->msr &= ~0x0f; dev->msr &= ~0x0f;
dev->int_status &= ~SERIAL_INT_MSR; dev->int_status &= ~SERIAL_INT_MSR;
serial_update_ints(dev); serial_update_ints(dev);