Add the Dell System 200 machine

src/include/86box/machine.h

@@ -475,6 +475,7 @@ extern int machine_at_spc4216p_init(const machine_t *);
 extern int machine_at_spc4620p_init(const machine_t *);
 extern int machine_at_kmxc02_init(const machine_t *);
 extern int machine_at_deskmaster286_init(const machine_t *);
+extern int machine_at_dells200_init(const machine_t *);
 
 extern int machine_at_pc8_init(const machine_t *);
 extern int machine_at_3302_init(const machine_t *);

src/machine/m_at_286_386sx.c

@@ -261,6 +261,24 @@ machine_at_px286_init(const machine_t *model)
     return ret;
 }
 
+int
+machine_at_dells200_init(const machine_t *model)
+{
+    int ret;
+
+    ret = bios_load_interleaved("roms/machines/dells200/dellL200256_LO_@DIP28.BIN",
+                                "roms/machines/dells200/Dell200256_HI_@DIP28.BIN",
+                                0x000f0000, 65536, 0);
+
+    if (bios_only || !ret)
+        return ret;
+
+    machine_at_common_ide_init(model);
+    device_add(&keyboard_at_device);
+
+    return ret;
+}
+
 int
 machine_at_micronics386_init(const machine_t *model)
 {

src/machine/machine_table.c

@@ -2975,6 +2975,47 @@ const machine_t machines[] = {
         .snd_device = NULL,
         .net_device = NULL
     },
+    /* No proper pictures of the KBC exist, though it seems to have the IBM AT KBC
+       firmware. */
+    {
+        .name = "[ISA] Dell System 200",
+        .internal_name = "dells200",
+        .type = MACHINE_TYPE_286,
+        .chipset = MACHINE_CHIPSET_PROPRIETARY,
+        .init = machine_at_dells200_init,
+        .p1_handler = NULL,
+        .gpio_handler = NULL,
+        .available_flag = MACHINE_AVAILABLE,
+        .gpio_acpi_handler = NULL,
+        .cpu = {
+            .package = CPU_PKG_286,
+            .block = CPU_BLOCK_NONE,
+            .min_bus = 6000000,
+            .max_bus = 12000000,
+            .min_voltage = 0,
+            .max_voltage = 0,
+            .min_multi = 0,
+            .max_multi = 0
+        },
+        .bus_flags = MACHINE_AT,
+        .flags = MACHINE_FLAGS_NONE,
+        .ram = {
+            .min = 640,
+            .max = 16384,
+            .step = 128
+        },
+        .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 = "[ISA] MR BIOS 286 clone",