Add OKI if386AX emulation (#7)

* add a machine oki if386ax

* if386AX: still in debug

* Revert "if386AX: still in debug"

This reverts commit ade401beb0c72cee6fd1ec4728097a87e75bc09b.

* if386ax: added I/O 6xh

* if386ax: remove comment

* formatting, sorting, change filename

* change mono color palette

src/machine/machine_table.c

@@ -4746,6 +4746,44 @@ const machine_t machines[] = {
         .snd_device = NULL,
         .net_device = NULL
     },
+    { .name = "[NEAT] OKI if386AX30L",
+        .internal_name = "if386sx",
+        .type = MACHINE_TYPE_386SX,
+        .chipset = MACHINE_CHIPSET_NEAT,
+        .init = machine_at_if386sx_init,
+        .p1_handler = NULL,
+        .gpio_handler = NULL,
+        .available_flag = MACHINE_AVAILABLE,
+        .gpio_acpi_handler = NULL,
+        .cpu = {
+            .package = CPU_PKG_386SX,
+            .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_AT,
+        .flags = MACHINE_VIDEO,
+        .ram = {
+            .min = 1024,
+            .max = 4096,
+            .step = 1024
+        },
+        .nvrmask = 127,
+        .kbc_device = NULL,
+        .kbc_p1 = 0xff,
+        .gpio = 0xffffffff,
+        .gpio_acpi = 0xffffffff,
+        .device = NULL,
+        .fdc_device = NULL,
+        .sio_device = NULL,
+        .vid_device = NULL,
+        .snd_device = NULL,
+        .net_device = NULL
+    },
     /* Has IBM AT KBC firmware. */
     {
         .name = "[OPTi 291] DTK PPM-3333P",