From 95194556f82ce5d445d8fe15cdb7826460ef5749 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Mon, 9 Jun 2025 19:34:58 +0200
Subject: [PATCH] Added the BIOSTAR MB-84xxUUD-A.

---
 src/include/86box/machine.h  |  1 +
 src/machine/m_at_386dx_486.c | 29 +++++++++++++++++++++++++
 src/machine/machine_table.c  | 41 ++++++++++++++++++++++++++++++++++++
 3 files changed, 71 insertions(+)

diff --git a/src/include/86box/machine.h b/src/include/86box/machine.h
index fe109150b..7aec5db4f 100644
--- a/src/include/86box/machine.h
+++ b/src/include/86box/machine.h
@@ -613,6 +613,7 @@ extern int machine_at_iach488_init(const machine_t *);
 extern int machine_at_pcm9340_init(const machine_t *);
 extern int machine_at_pcm5330_init(const machine_t *);
 
+extern int machine_at_84xxuuda_init(const machine_t *);
 extern int machine_at_ecs486_init(const machine_t *);
 extern int machine_at_hot433a_init(const machine_t *);
 extern int machine_at_pl4600c_init(const machine_t *);
diff --git a/src/machine/m_at_386dx_486.c b/src/machine/m_at_386dx_486.c
index cc6c9cfc8..a43d5ea63 100644
--- a/src/machine/m_at_386dx_486.c
+++ b/src/machine/m_at_386dx_486.c
@@ -2262,6 +2262,35 @@ machine_at_hot433a_init(const machine_t *model)
     return ret;
 }
 
+int
+machine_at_84xxuuda_init(const machine_t *model)
+{
+    int ret;
+
+    ret = bios_load_linear("roms/machines/84xxuuda/uud0520s.bin",
+                           0x000e0000, 131072, 0);
+
+    if (bios_only || !ret)
+        return ret;
+
+    machine_at_common_init(model);
+
+    pci_init(PCI_CONFIG_TYPE_1);
+    pci_register_slot(0x10, PCI_CARD_NORTHBRIDGE, 0, 0, 0, 0);
+    pci_register_slot(0x12, PCI_CARD_SOUTHBRIDGE, 1, 2, 3, 4);
+    pci_register_slot(0x03, PCI_CARD_NORMAL,      1, 2, 3, 4);
+    pci_register_slot(0x04, PCI_CARD_NORMAL,      2, 3, 4, 1);
+    pci_register_slot(0x05, PCI_CARD_NORMAL,      3, 4, 1, 2);
+
+    device_add(&umc_hb4_device);
+    device_add(&umc_8886bf_device);
+    device_add(&um8663bf_device);
+    device_add(&winbond_flash_w29c010_device);
+    device_add(&keyboard_ps2_ami_device);
+
+    return ret;
+}
+
 int
 machine_at_pl4600c_init(const machine_t *model)
 {
diff --git a/src/machine/machine_table.c b/src/machine/machine_table.c
index ce1e5836a..4f907ce10 100644
--- a/src/machine/machine_table.c
+++ b/src/machine/machine_table.c
@@ -9117,6 +9117,47 @@ const machine_t machines[] = {
         .snd_device = NULL,
         .net_device = NULL
     },
+    /* This has the UMC 88xx on-chip KBC. All the copies of the BIOS string I can find, end in
+       in -H, so the UMC on-chip KBC likely emulates the AMI 'H' KBC firmware. */
+    {
+        .name = "[UMC 8881] Biostar MB-84xxUUD-A",
+        .internal_name = "84xxuuda",
+        .type = MACHINE_TYPE_486_S3_PCI,
+        .chipset = MACHINE_CHIPSET_UMC_UM8881,
+        .init = machine_at_84xxuuda_init,
+        .p1_handler = NULL,
+        .gpio_handler = NULL,
+        .available_flag = MACHINE_AVAILABLE,
+        .gpio_acpi_handler = NULL,
+        .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_PCI,
+        .flags = MACHINE_IDE_DUAL | MACHINE_APM,
+        .ram = {
+            .min = 1024,
+            .max = 131072,
+            .step = 1024
+        },
+        .nvrmask = 255,
+        .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
+    },
     /* This has an AMIKey-2, which is an updated version of type 'H'. */
     {
         .name = "[UMC 8881] ECS Elite UM8810P-AIO",