diff --git a/hw/pflash_cfi01.c b/hw/pflash_cfi01.c
index 9e6ff52..c79e599 100644
--- a/hw/pflash_cfi01.c
+++ b/hw/pflash_cfi01.c
@@ -162,7 +162,10 @@ static uint32_t pflash_read (pflash_t *pfl, hwaddr offset,
         }
 
         break;
+    case 0x10: /* Single byte program */
     case 0x20: /* Block erase */
+    case 0x28: /* Block erase */
+    case 0x40: /* single byte program */
     case 0x50: /* Clear status register */
     case 0x60: /* Block /un)lock */
     case 0x70: /* Status Register */