From 41809098406c5900724ffeb1124526862a00dff7 Mon Sep 17 00:00:00 2001
From: Verloren50000 <110334428+Verloren50000@users.noreply.github.com>
Date: Fri, 26 Sep 2025 11:21:12 +0800
Subject: [PATCH] Add BIOS selector and the mid-1999 BIOS to the ABit AB-LX6
 (#6224)

* machine.h: Configuration added for ABit AB-LX6

* m_at_slot1.c: Configuration is almost there for ABit AB-LX6

* Congratulations! BIOS Selector for ABit AB-LX6 is complete.
---
 src/include/86box/machine.h |  3 +++
 src/machine/m_at_slot1.c    | 50 +++++++++++++++++++++++++++++++++----
 src/machine/machine_table.c |  2 +-
 3 files changed, 49 insertions(+), 6 deletions(-)

diff --git a/src/include/86box/machine.h b/src/include/86box/machine.h
index 101ed2934..b88d8f492 100644
--- a/src/include/86box/machine.h
+++ b/src/include/86box/machine.h
@@ -1117,6 +1117,9 @@ extern int             machine_at_p65up5_cpknd_init(const machine_t *);
 extern int             machine_at_kn97_init(const machine_t *);
 
 /* i440LX */
+#ifdef EMU_DEVICE_H
+extern const device_t  lx6_device;
+#endif
 extern int             machine_at_lx6_init(const machine_t *);
 extern int             machine_at_optiplexgxa_init(const machine_t *);
 extern int             machine_at_spitfire_init(const machine_t *);
diff --git a/src/machine/m_at_slot1.c b/src/machine/m_at_slot1.c
index 4c25799f6..22d6baac8 100644
--- a/src/machine/m_at_slot1.c
+++ b/src/machine/m_at_slot1.c
@@ -151,17 +151,57 @@ machine_at_kn97_init(const machine_t *model)
 }
 
 /* i440LX */
+static const device_config_t lx6_config[] = {
+    // clang-format off
+    {
+        .name = "bios",
+        .description = "BIOS Version",
+        .type = CONFIG_BIOS,
+        .default_string = "lx6",
+        .default_int = 0,
+        .file_filter = "",
+        .spinner = { 0 },
+        .bios = {
+            { .name = "Award Modular BIOS v4.51PG - Revision LY", .internal_name = "lx6", .bios_type = BIOS_NORMAL, 
+              .files_no = 1, .local = 0, .size = 131072, .files = { "roms/machines/lx6/LX6C_LY.BIN", "" } },
+            { .name = "Award Modular BIOS v4.51PG - Revision PZ Beta", .internal_name = "lx6_beta", .bios_type = BIOS_NORMAL, 
+              .files_no = 1, .local = 0, .size = 131072, .files = { "roms/machines/lx6/LX6C_PZ.B00", "" } },
+            { .files_no = 0 }
+        },
+    },
+    { .name = "", .description = "", .type = CONFIG_END }
+    // clang-format on
+};
+
+const device_t lx6_device = {
+    .name          = "ABIT AB-LX6",
+    .internal_name = "lx6_device",
+    .flags         = 0,
+    .local         = 0,
+    .init          = NULL,
+    .close         = NULL,
+    .reset         = NULL,
+    .available     = NULL,
+    .speed_changed = NULL,
+    .force_redraw  = NULL,
+    .config        = lx6_config
+};
+
 int
 machine_at_lx6_init(const machine_t *model)
 {
-    int ret;
+    int ret = 0;
+    const char* fn;
 
-    ret = bios_load_linear("roms/machines/lx6/LX6C_PZ.B00",
-                           0x000e0000, 131072, 0);
-
-    if (bios_only || !ret)
+    /* No ROMs available */
+    if (!device_available(model->device))
         return ret;
 
+    device_context(model->device);
+    fn = device_get_bios_file(machine_get_device(machine), device_get_config_bios("bios"), 0);
+    ret = bios_load_linear(fn, 0x000e0000, 131072, 0);
+    device_context_restore();
+
     machine_at_common_init_ex(model, 2);
 
     pci_init(PCI_CONFIG_TYPE_1);
diff --git a/src/machine/machine_table.c b/src/machine/machine_table.c
index cbc48db1d..8c9055c9b 100644
--- a/src/machine/machine_table.c
+++ b/src/machine/machine_table.c
@@ -17217,7 +17217,7 @@ const machine_t machines[] = {
         .kbc_p1 = 0x00000cf0,
         .gpio = 0xffffffff,
         .gpio_acpi = 0xffffffff,
-        .device = NULL,
+        .device = &lx6_device,
         .kbd_device = NULL,
         .fdc_device = NULL,
         .sio_device = NULL,