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-rw-r--r--hw/misc/macio/cuda.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/hw/misc/macio/cuda.c b/hw/misc/macio/cuda.c
index b7071e89d5..5bbc7770fa 100644
--- a/hw/misc/macio/cuda.c
+++ b/hw/misc/macio/cuda.c
@@ -116,6 +116,7 @@ static void cuda_update(CUDAState *s)
{
MOS6522CUDAState *mcs = &s->mos6522_cuda;
MOS6522State *ms = MOS6522(mcs);
+ ADBBusState *adb_bus = &s->adb_bus;
int packet_received, len;
packet_received = 0;
@@ -126,6 +127,9 @@ static void cuda_update(CUDAState *s)
/* data output */
if ((ms->b & (TACK | TIP)) != (s->last_b & (TACK | TIP))) {
if (s->data_out_index < sizeof(s->data_out)) {
+ if (s->data_out_index == 0) {
+ adb_autopoll_block(adb_bus);
+ }
trace_cuda_data_send(ms->sr);
s->data_out[s->data_out_index++] = ms->sr;
cuda_delay_set_sr_int(s);
@@ -140,6 +144,7 @@ static void cuda_update(CUDAState *s)
/* indicate end of transfer */
if (s->data_in_index >= s->data_in_size) {
ms->b = (ms->b | TREQ);
+ adb_autopoll_unblock(adb_bus);
}
cuda_delay_set_sr_int(s);
}