Add Vision Systems LBA Enhancer

src/disk/CMakeLists.txt

@@ -16,7 +16,7 @@
 add_library(hdd OBJECT hdd.c hdd_image.c hdd_table.c hdc.c hdc_st506_xt.c
     hdc_st506_at.c hdc_xta.c hdc_esdi_at.c hdc_esdi_mca.c hdc_xtide.c
     hdc_ide.c hdc_ide_ali5213.c hdc_ide_opti611.c hdc_ide_cmd640.c hdc_ide_cmd646.c
-    hdc_ide_sff8038i.c hdc_ide_um8673f.c hdc_ide_w83769f.c)
+    hdc_ide_sff8038i.c hdc_ide_um8673f.c hdc_ide_w83769f.c lba_enhancer.c)
 
 add_library(zip OBJECT zip.c)
 

src/disk/lba_enhancer.c

@@ -0,0 +1,97 @@
+/*
+ * 86Box    A hypervisor and IBM PC system emulator that specializes in
+ *          running old operating systems and software designed for IBM
+ *          PC systems and compatibles from 1981 through fairly recent
+ *          system designs based on the PCI bus.
+ *
+ *          This file is part of the 86Box distribution.
+ *
+ *          Vision Systems LBA Enhancer emulation.
+ *
+ *
+ *
+ * Authors: Cacodemon345
+ *
+ *          Copyright 2024 Cacodemon345
+ */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#define HAVE_STDARG_H
+#include <86box/86box.h>
+#include <86box/io.h>
+#include <86box/device.h>
+#include <86box/mem.h>
+#include <86box/rom.h>
+#include <86box/plat_unused.h>
+
+typedef struct lba_enhancer_t
+{
+    rom_t rom;
+} lba_enhancer_t;
+
+#define BIOS_LBA_ENHANCER "roms/hdd/misc/lbaenhancer.bin"
+
+void* lba_enhancer_init(const device_t* info)
+{
+    lba_enhancer_t* lba_enhancer = (lba_enhancer_t*)calloc(1, sizeof(lba_enhancer_t));
+
+    rom_init(&lba_enhancer->rom, BIOS_LBA_ENHANCER, device_get_config_hex20("bios_addr"), 0x4000, 0x3fff, 0, MEM_MAPPING_EXTERNAL);
+    return lba_enhancer;
+}
+
+void lba_enhancer_close(void* priv)
+{
+    lba_enhancer_t* lba_enhancer = (lba_enhancer_t*)priv;
+
+    free(lba_enhancer->rom.rom);
+    free(priv);
+    return;
+}
+
+static int
+lba_enhancer_available(void)
+{
+    return rom_present(BIOS_LBA_ENHANCER);
+}
+
+// clang-format off
+static const device_config_t lba_enhancer_config[] = {
+    {
+        .name = "bios_addr",
+        .description = "BIOS Address",
+        .type = CONFIG_HEX20,
+        .default_string = "",
+        .default_int = 0xc8000,
+        .file_filter = "",
+        .spinner = { 0 },
+        .selection = {
+            { .description = "C800H",    .value = 0xc8000 },
+            { .description = "CC00H",    .value = 0xcc000 },
+            { .description = "D000H",    .value = 0xd0000 },
+            { .description = "D400H",    .value = 0xd4000 },
+            { .description = "D800H",    .value = 0xd8000 },
+            { .description = "DC00H",    .value = 0xdc000 },
+            { .description = ""                           }
+        },
+    },
+    { .name = "", .description = "", .type = CONFIG_END }
+};
+// clang-format on
+
+const device_t lba_enhancer_device = {
+    .name          = "Vision Systems LBA Enhancer",
+    .internal_name = "lba_enhancer",
+    .flags         = DEVICE_AT,
+    .local         = 0,
+    .init          = lba_enhancer_init,
+    .close         = lba_enhancer_close,
+    .reset         = NULL,
+    { .available = lba_enhancer_available },
+    .speed_changed = NULL,
+    .force_redraw  = NULL,
+    .config        = lba_enhancer_config
+};