Add the Olivetti M4-5xx.

src/machine/machine_table.c

@@ -6658,6 +6658,45 @@ const machine_t machines[] = {
         .snd_device = NULL,
         .net_device = NULL
     },
+    /* Absolutely no information. Anything here is guesswork. */
+    {
+        .name = "[OPTi 802GP] Olivetti M4-5xx",
+        .internal_name = "m45xx",
+        .type = MACHINE_TYPE_486_S3,
+        .chipset = MACHINE_CHIPSET_OPTI_895_802G, //OPTi 802GP
+        .init = machine_at_m45xx_init,
+        .pad = 0,
+        .pad0 = 0,
+        .pad1 = MACHINE_AVAILABLE,
+        .pad2 = 0,
+        .cpu = {
+            .package = CPU_PKG_SOCKET3,
+            .block = CPU_BLOCK_NONE,
+            .min_bus = 0,
+            .max_bus = 0,
+            .min_voltage = 0,
+            .max_voltage = 0,
+            .min_multi = 0,
+            .max_multi = 0
+        },
+        .bus_flags = MACHINE_PS2_PCIV,
+        .flags = MACHINE_IDE | MACHINE_APM,
+        .ram = {
+            .min = 1024,
+            .max = 65536,
+            .step = 1024
+        },
+        .nvrmask = 127,
+        .kbc_device = NULL,
+        .kbc_p1 = 0,
+        .gpio = 0,
+        .device = NULL,
+        .fdc_device = NULL,
+        .sio_device = NULL,
+        .vid_device = NULL,
+        .snd_device = NULL,
+        .net_device = NULL
+    },
     /* This has an AMIKey-2, which is an updated version of type 'H'. */
     {
         .name = "[i420EX] ASUS PVI-486AP4",