Changeset 76843 in vbox for trunk/src/VBox

Timestamp:

Jan 16, 2019 6:13:57 PM (6 years ago)

Author:

vboxsync

Message:

PCnet: Really ignore writes to certain registers when STOP or SPND not set. Ignore high 8 bits of 32-bit initialization address base on ISA chips.

File:

• trunk/src/VBox/Devices/Network/DevPCNet.cpp (modified) (3 diffs)

trunk/src/VBox/Devices/Network/DevPCNet.cpp

@@ -2929 +2929 @@
                 return rc;
             }
+        case 2:  /* IADRH */
+            if (PCNET_IS_ISA(pThis))
+                val &= 0x00ff;  /* Upper 8 bits ignored on ISA chips. */
+            RT_FALL_THRU();
         case 1:  /* IADRL */
-        case 2:  /* IADRH */
         case 8:  /* LADRF  0..15 */
         case 9:  /* LADRF 16..31 */
@@ -2969 +2972 @@
             if (CSR_STOP(pThis) || CSR_SPND(pThis))
                 break;
+            else
+            {
+                Log(("#%d: WRITE CSR%d, %#06x, ignoring!!\n", PCNET_INST_NR, u32RAP, val));
+                return rc;
+            }
         case 3: /* Interrupt Mask and Deferral Control */
             break;
@@ -3016 +3024 @@
             if (!CSR_STOP(pThis) && !CSR_SPND(pThis))
             {
-                Log(("#%d: WRITE CSR%d, %#06x !!\n", PCNET_INST_NR, u32RAP, val));
+                Log(("#%d: WRITE CSR%d, %#06x, ignoring!!\n", PCNET_INST_NR, u32RAP, val));
                 return rc;
             }