Let's let the user know they are Emulating a PlayStation. The ByteSize may be wrong.

BizHawk.Client.Common/Global.cs

@@ -138,6 +138,8 @@ namespace BizHawk.Client.Common
 						return SystemInfo.WonderSwan;
 					case "Lynx":
 						return SystemInfo.Lynx;
+					case "PSX":
+						return SystemInfo.PSX;
 				}
 			}
 		}

BizHawk.Client.Common/SystemInfo.cs

@@ -296,5 +296,16 @@ namespace BizHawk.Client.Common
 				};
 			}
 		}
+		public static SystemInfo PSX
+		{
+			get
+			{
+				return new SystemInfo
+				{
+					DisplayName = "PlayStation",
+					ByteSize = 4,
+				};
+			}
+		}
 	}
 }