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-rw-r--r--hw/serial.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/hw/serial.c b/hw/serial.c
index 0fc1ccb9d0..3fe482c391 100644
--- a/hw/serial.c
+++ b/hw/serial.c
@@ -133,7 +133,10 @@ static void serial_ioport_write(void *opaque, uint32_t addr, uint32_t val)
if (s->lcr & UART_LCR_DLAB) {
s->divider = (s->divider & 0x00ff) | (val << 8);
} else {
- s->ier = val;
+ s->ier = val & 0x0f;
+ if (s->lsr & UART_LSR_THRE) {
+ s->thr_ipending = 1;
+ }
serial_update_irq(s);
}
break;
@@ -143,7 +146,7 @@ static void serial_ioport_write(void *opaque, uint32_t addr, uint32_t val)
s->lcr = val;
break;
case 4:
- s->mcr = val;
+ s->mcr = val & 0x1f;
break;
case 5:
break;