diff --git a/src/device/isartc.c b/src/device/isartc.c
index 2eaf4c5bd..3e488f8db 100644
--- a/src/device/isartc.c
+++ b/src/device/isartc.c
@@ -410,6 +410,7 @@ mm67_read(uint16_t port, void *priv)
             break;
 
         case MM67_AL_MSEC:
+        case MM67_MSEC:
             ret                = dev->nvr.regs[reg] & 0xf0;
             break;
 
@@ -417,6 +418,10 @@ mm67_read(uint16_t port, void *priv)
             ret                = dev->nvr.regs[reg] & 0x0f;
             break;
 
+        case MM67_DOW:
+            ret                = dev->nvr.regs[reg] & 0x07;
+            break;
+
         default:
             ret = dev->nvr.regs[reg];
             break;