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[v4,16/20] mac_via: implement ADB_STATE_IDLE state if shift register in input mode

Message ID 20231004083806.757242-17-mark.cave-ayland@ilande.co.uk
State New
Headers show
Series q800: add support for booting MacOS Classic - part 2 | expand

Commit Message

Mark Cave-Ayland Oct. 4, 2023, 8:38 a.m. UTC 
NetBSD switches directly to IDLE state without switching the shift register to
input mode. Duplicate the existing ADB_STATE_IDLE logic in input mode from when
the shift register is in output mode which allows the ADB autopoll handler to
handle the response.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
---
 hw/misc/mac_via.c | 6 ++++++
 1 file changed, 6 insertions(+)
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Patch

diff --git a/hw/misc/mac_via.c b/hw/misc/mac_via.c
index 9f9c2815d0..3c41d6263d 100644
--- a/hw/misc/mac_via.c
+++ b/hw/misc/mac_via.c
@@ -702,6 +702,12 @@  static void adb_via_send(MOS6522Q800VIA1State *v1s, int state, uint8_t data)
         break;
 
     case ADB_STATE_IDLE:
+        ms->b |= VIA1B_vADBInt;
+        adb_autopoll_unblock(adb_bus);
+
+        trace_via1_adb_send("IDLE", data,
+                            (ms->b & VIA1B_vADBInt) ? "+" : "-");
+
         return;
     }