Preliminary attempt at implementing the Dell OptiPlex GN+

src/include/86box/machine.h

@@ -751,6 +751,7 @@ extern int machine_at_gw2kte_init(const machine_t *);
 extern int machine_at_ma23c_init(const machine_t *);
 extern int machine_at_nupro592_init(const machine_t *);
 extern int machine_at_tx97_init(const machine_t *);
+extern int machine_at_optiplex_gn_init(const machine_t *);
 #ifdef USE_AN430TX
 extern int machine_at_an430tx_init(const machine_t *);
 #endif /* USE_AN430TX */

src/machine/m_at_socket7.c

@@ -969,6 +969,40 @@ machine_at_tx97_init(const machine_t *model)
     return ret;
 }
 
+int
+machine_at_optiplex_gn_init(const machine_t *model)
+{
+    int ret;
+
+    ret = bios_load_linear("roms/machines/optiplex_gn/Gn_a11.rom",
+                           0x000c0000, 262144, 0);
+
+    if (bios_only || !ret)
+        return ret;
+
+    machine_at_common_init_ex(model, 2);
+
+    pci_init(PCI_CONFIG_TYPE_1);
+    pci_register_slot(0x00, PCI_CARD_NORTHBRIDGE, 1, 2, 3, 4);
+    pci_register_slot(0x10, PCI_CARD_VIDEO,       4, 0, 0, 0); /* Trio64V2/GX, temporarily Trio64V2/DX is given */
+    pci_register_slot(0x0D, PCI_CARD_NORMAL,      2, 1, 3, 4);
+    pci_register_slot(0x0E, PCI_CARD_NORMAL,      3, 4, 2, 1);
+    pci_register_slot(0x11, PCI_CARD_NETWORK,     4, 0, 0, 0); /* 3C905, not yet emulated */
+    pci_register_slot(0x07, PCI_CARD_SOUTHBRIDGE, 0, 0, 0, 4);
+
+    if (gfxcard[0] == VID_INTERNAL)
+        device_add(machine_get_vid_device(machine));
+
+    device_add(&i430tx_device);
+    device_add(&piix4_device);
+    device_add(&keyboard_ps2_ami_pci_device);
+    device_add(&pc87307_15c_device);
+    device_add(&intel_flash_bxt_device);
+    spd_register(SPD_TYPE_SDRAM, 0x3, 128);
+
+    return ret;
+}
+
 #ifdef USE_AN430TX
 int
 machine_at_an430tx_init(const machine_t *model)

src/machine/machine_table.c

@@ -13103,6 +13103,50 @@ const machine_t machines[] = {
         .snd_device = NULL,
         .net_device = NULL
     },
+    /* According to Dell specifications, it can have either National Semiconductor PC87307 or PC87309
+       Super I/O. All known instances have the former, although other similar Dells of the era have
+       pinouts for accompanying either so this likely also does.
+
+       The KBC is likely an AMIKey-2 clone. */
+    {
+        .name = "[i430TX] Dell OptiPlex GN+",
+        .internal_name = "optiplex_gn",
+        .type = MACHINE_TYPE_SOCKET7,
+        .chipset = MACHINE_CHIPSET_INTEL_430TX,
+        .init = machine_at_optiplex_gn_init,
+        .p1_handler = NULL,
+        .gpio_handler = NULL,
+        .available_flag = MACHINE_AVAILABLE,
+        .gpio_acpi_handler = NULL,
+        .cpu = {
+            .package = CPU_PKG_SOCKET5_7,
+            .block = CPU_BLOCK_NONE,
+            .min_bus = 50000000,
+            .max_bus = 66666667,
+            .min_voltage = 2500,
+            .max_voltage = 3520,
+            .min_multi = 1.5,
+            .max_multi = 3.5
+        },
+        .bus_flags = MACHINE_PS2_PCI,
+        .flags = MACHINE_IDE_DUAL | MACHINE_APM | MACHINE_ACPI | MACHINE_VIDEO, /* Video: S3 86C785 (Trio64V2/GX), ethernet: 3C905 */
+        .ram = {
+            .min = 8192,
+            .max = 262144,
+            .step = 8192
+        },
+        .nvrmask = 255,
+        .kbc_device = NULL,
+        .kbc_p1 = 0xff,
+        .gpio = 0xffffffff,
+        .gpio_acpi = 0xffffffff,
+        .device = NULL,
+        .fdc_device = NULL,
+        .sio_device = NULL,
+        .vid_device = &s3_trio64v2_dx_onboard_pci_device, /* Stop-gap measure until the Trio64V2/GX is emulated, as both use the same VBIOS  */
+        .snd_device = NULL,
+        .net_device = NULL
+    },
     /* [TEST] Has AMI Megakey '5' KBC firmware on the SM(S)C FDC37C67x Super I/O chip. */
     {
         .name = "[i430TX] Gateway E-1000",