Added the Shottle HOT-433A eSupport BIOS.

src/floppy/fdc.c

@@ -187,10 +187,18 @@ fdc_ctrl_reset(void *priv)
     fdc->stat             = 0x80;
     fdc->pnum = fdc->ptot = 0;
     fdc->st0              = 0;
-    fdc->lock             = 0;
     fdc->head             = 0;
     fdc->step             = 0;
     fdc->power_down       = 0;
+
+    if (!fdc->lock) {
+        fdc->fifo  = 0;
+        fdc->tfifo = 1;
+
+        fifo_reset(fdc->fifo_p);
+        fifo_set_len(fdc->fifo_p, fdc->tfifo + 1);
+        fifo_set_trigger_len(fdc->fifo_p, fdc->tfifo + 1);
+    }
 }
 
 sector_id_t
@@ -2374,6 +2382,8 @@ fdc_reset(void *priv)
     fdc->swwp          = 0;
     fdc->disable_write = 0;
 
+    fdc->lock          = 0;
+
     fdc_ctrl_reset(fdc);
 
     if (!(fdc->flags & FDC_FLAG_AT))

src/include/86box/pic.h

@@ -102,4 +102,6 @@ extern int     picinterrupt(void);
 
 extern uint8_t pic_irq_ack(void);
 
+extern void    pic_toggle_latch(int is_ps2);
+
 #endif /*EMU_PIC_H*/

src/machine/m_at_386dx_486.c

@@ -2232,18 +2232,66 @@ machine_at_ecs486_init(const machine_t *model)
     return ret;
 }
 
+static const device_config_t hot433a_config[] = {
+    // clang-format off
+    {
+        .name = "bios",
+        .description = "BIOS Version",
+        .type = CONFIG_BIOS,
+        .default_string = "hot433a",
+        .default_int = 0,
+        .file_filter = "",
+        .spinner = { 0 },
+        .bios = {
+            { .name = "AMI", .internal_name = "hot433a", .bios_type = BIOS_NORMAL, 
+              .files_no = 1, .local = 0, .size = 131072, .files = { "roms/machines/hot433/433AUS33.ROM", "" } },
+            { .name = "Award (eSupport update)", .internal_name = "hot433a_award", .bios_type = BIOS_NORMAL, 
+              .files_no = 1, .local = 0, .size = 131072, .files = { "roms/machines/hot433/2A4X5H21.BIN", "" } },
+            { .files_no = 0 }
+        },
+    },
+    { .name = "", .description = "", .type = CONFIG_END }
+    // clang-format on
+};
+
+const device_t hot433a_device = {
+    .name          = "Shuttle HOT-433A",
+    .internal_name = "hot433a_device",
+    .flags         = 0,
+    .local         = 0,
+    .init          = NULL,
+    .close         = NULL,
+    .reset         = NULL,
+    .available     = NULL,
+    .speed_changed = NULL,
+    .force_redraw  = NULL,
+    .config        = hot433a_config
+};
+
 int
 machine_at_hot433a_init(const machine_t *model)
 {
-    int ret;
+    int ret = 0;
+    const char* fn;
 
-    ret = bios_load_linear("roms/machines/hot433/433AUS33.ROM",
+    /* No ROMs available */
-                           0x000e0000, 131072, 0);
+    if (!device_available(model->device))
+        return ret;
+
+    device_context(model->device);
+    int is_award = !strcmp(device_get_config_bios("bios"), "hot433a_award");
+    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();
 
     if (bios_only || !ret)
         return ret;
 
-    machine_at_common_init(model);
+    machine_at_common_init_ex(model, 2);
+    if (is_award)
+        device_add(&amstrad_megapc_nvr_device);
+    else
+        device_add(&ami_1994_nvr_device);
 
     pci_init(PCI_CONFIG_TYPE_1);
     pci_register_slot(0x10, PCI_CARD_NORTHBRIDGE, 0, 0, 0, 0);
@@ -2255,9 +2303,17 @@ machine_at_hot433a_init(const machine_t *model)
 
     device_add(&umc_hb4_device);
     device_add(&umc_8886bf_device);
-    device_add(&um8669f_device);
+    if (is_award)
+        device_add(&um8663af_device);
+    else
+        device_add(&um8669f_device);
     device_add(&winbond_flash_w29c010_device);
-    device_add(&keyboard_at_ami_device);
+    if (is_award)
+        device_add(&keyboard_ps2_ami_device);
+    else
+        device_add(&keyboard_at_ami_device);
+
+    pic_toggle_latch(is_award);
 
     return ret;
 }

src/machine/machine_table.c

@@ -69,6 +69,7 @@ extern const device_t ap5s_device;
 extern const device_t d842_device;
 extern const device_t d943_device;
 extern const device_t dells333sl_device;
+extern const device_t hot433a_device;
 
 const machine_filter_t machine_types[] = {
     { "None",                             MACHINE_TYPE_NONE       },
@@ -9381,7 +9382,7 @@ const machine_t machines[] = {
             .min_multi = 0,
             .max_multi = 0
         },
-        .bus_flags = MACHINE_PCI,
+        .bus_flags = MACHINE_PS2_PCI,
         .flags = MACHINE_IDE_DUAL | MACHINE_APM,
         .ram = {
             .min = 1024,
@@ -9393,7 +9394,7 @@ const machine_t machines[] = {
         .kbc_p1 = 0xff,
         .gpio = 0xffffffff,
         .gpio_acpi = 0xffffffff,
-        .device = NULL,
+        .device = &hot433a_device,
         .fdc_device = NULL,
         .sio_device = NULL,
         .vid_device = NULL,

src/pic.c

@@ -638,6 +638,25 @@ pic_reset_hard(void)
     }
 }
 
+void
+pic_toggle_latch(int is_ps2)
+{
+    pic_kbd_latch(0x00);
+    pic_mouse_latch(0x00);
+
+    /* Explicitly reset the latches. */
+    kbd_latch = mouse_latch = 0;
+    latched_irqs = 0x0000;
+
+    /* The situation is as follows: There is a giant mess when it comes to these latches on real hardware,
+       to the point that there's even boards with board-level latched that get used in place of the latches
+       on the chipset, therefore, I'm just doing this here for the sake of simplicity. */
+    if (is_ps2) {
+        pic_kbd_latch(0x01);
+        pic_mouse_latch(0x01);
+    }
+}
+
 void
 pic_init(void)
 {