Merge remote-tracking branch 'upstream/master' into feature/ich2

2026-02-23 18:08:20 -07:00 · 2022-10-19 16:28:07 -04:00
parent b777a7cf7d 005819c74f
commit fa8029cb57
76 changed files with 1907 additions and 118 deletions
--- a/README.md
+++ b/README.md
@@ -14,21 +14,22 @@ Features
 * MIDI output to Windows built-in MIDI support, FluidSynth, or emulated Roland synthesizers
 * Supports running MS-DOS, older Windows versions, OS/2, many Linux distributions, or vintage systems such as BeOS or NEXTSTEP, and applications for these systems

-System requirements and recommendations
---------------------------------------
+Minimum system requirements and recommendations
+-----------------------------------------------
 * Intel Core 2 or AMD Athlon 64 processor
 * Windows version: Windows 7 Service Pack 1, Windows 8.1 or Windows 10
 * Linux version: Ubuntu 16.04, Debian 9.0 or other distributions from 2016 onwards
+* macOS version: macOS High Sierra 10.13
 * 4 GB of RAM

-Performance may vary depending on both host and guest configuration. Most emulation logic is executed in a single thread, therefore generally systems with better IPC (instructions per clock) should be able to emulate higher clock speeds.
+Performance may vary depending on both host and guest configuration. Most emulation logic is executed in a single thread; therefore, systems with better IPC (instructions per clock) generally should be able to emulate higher clock speeds.

 It is also recommended to use a manager application with 86Box for easier handling of multiple virtual machines.
 * [86Box Manager](https://github.com/86Box/86BoxManager) by [Overdoze](https://github.com/daviunic) (Windows only)
 * [86Box Manager Lite](https://github.com/insanemal/86box_manager_py) by [Insanemal](https://github.com/insanemal)
 * [WinBox for 86Box](https://github.com/86Box/WinBox-for-86Box) by Laci bá' (Windows only)

-However, it is also possible to use 86Box on its own with the `--vmpath`/`-P` command line option.
+It is also possible to use 86Box on its own with the `--vmpath`/`-P` command line option.

 Getting started
 ---------------
--- a/src/cdrom/CMakeLists.txt
+++ b/src/cdrom/CMakeLists.txt
@@ -13,4 +13,4 @@
 #           Copyright 2020,2021 David Hrdlička.
 #

-add_library(cdrom OBJECT cdrom.c cdrom_image_backend.c cdrom_image.c)
+add_library(cdrom OBJECT cdrom.c cdrom_image_backend.c cdrom_image_viso.c cdrom_image.c)
--- a/src/cdrom/cdrom_image.c
+++ b/src/cdrom/cdrom_image.c
@@ -268,14 +268,16 @@ cdrom_image_open(cdrom_t *dev, const char *fn)
    dev->image = img;

    /* Open the image. */
-    if (!cdi_set_device(img, fn))
+    int i = cdi_set_device(img, fn);
+    if (!i)
        return image_open_abort(dev);

    /* All good, reset state. */
-    if (!strcasecmp(path_get_extension((char *) fn), "ISO"))
+    if (i >= 2)
        dev->cd_status = CD_STATUS_DATA_ONLY;
    else
        dev->cd_status = CD_STATUS_STOPPED;
+    dev->is_dir         = (i == 3);
    dev->seek_pos       = 0;
    dev->cd_buflen      = 0;
    dev->cdrom_capacity = image_get_capacity(dev);
--- a/src/cdrom/cdrom_image_backend.c
+++ b/src/cdrom/cdrom_image_backend.c
@@ -1,36 +1,37 @@
 /*
- * 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.
+ * 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.
+ *          This file is part of the 86Box distribution.
 *
- *		CD-ROM image file handling module, translated to C from
- *		cdrom_dosbox.cpp.
+ *          CD-ROM image file handling module, translated to C from
+ *          cdrom_dosbox.cpp.
 *
- * Authors:	Miran Grca, <mgrca8@gmail.com>
- *		Fred N. van Kempen, <decwiz@yahoo.com>
- *		The DOSBox Team, <unknown>
+ * Authors: Miran Grca, <mgrca8@gmail.com>
+ *          Fred N. van Kempen, <decwiz@yahoo.com>
+ *          The DOSBox Team, <unknown>
 *
- *		Copyright 2016-2020 Miran Grca.
- *		Copyright 2017-2020 Fred N. van Kempen.
- *		Copyright 2002-2020 The DOSBox Team.
+ *          Copyright 2016-2020 Miran Grca.
+ *          Copyright 2017-2020 Fred N. van Kempen.
+ *          Copyright 2002-2020 The DOSBox Team.
 */
 #define __STDC_FORMAT_MACROS
-#include <stdarg.h>
-#include <inttypes.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <stdint.h>
-#include <string.h>
 #include <ctype.h>
+#include <inttypes.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
 #ifdef _WIN32
 #    include <string.h>
+#    include <sys/types.h>
 #else
 #    include <libgen.h>
 #endif
-#include <wchar.h>
 #define HAVE_STDARG_H
 #include <86box/86box.h>
 #include <86box/path.h>
@@ -132,6 +133,7 @@ static track_file_t *
 bin_init(const char *filename, int *error)
 {
    track_file_t *tf = (track_file_t *) malloc(sizeof(track_file_t));
+    struct stat stats;

    if (tf == NULL) {
        *error = 1;
@@ -143,7 +145,11 @@ bin_init(const char *filename, int *error)
    tf->file = plat_fopen64(tf->fn, "rb");
    cdrom_image_backend_log("CDROM: binary_open(%s) = %08lx\n", tf->fn, tf->file);

-    *error = (tf->file == NULL);
+    if (stat(tf->fn, &stats) != 0) {
+        /* Use a blank structure if stat failed. */
+        memset(&stats, 0, sizeof(struct stat));
+    }
+    *error = ((tf->file == NULL) || ((stats.st_mode & S_IFMT) == S_IFDIR));

    /* Set the function pointers. */
    if (!*error) {
@@ -222,11 +228,13 @@ cdi_close(cd_img_t *cdi)
 int
 cdi_set_device(cd_img_t *cdi, const char *path)
 {
-    if (cdi_load_cue(cdi, path))
-        return 1;
+    int ret;

-    if (cdi_load_iso(cdi, path))
-        return 1;
+    if ((ret = cdi_load_cue(cdi, path)))
+        return ret;
+
+    if ((ret = cdi_load_iso(cdi, path)))
+        return ret;

    return 0;
 }
@@ -532,7 +540,7 @@ cdi_track_push_back(cd_img_t *cdi, track_t *trk)
 int
 cdi_load_iso(cd_img_t *cdi, const char *filename)
 {
-    int     error;
+    int     error, ret = 2;
    track_t trk;

    cdi->tracks     = NULL;
@@ -545,7 +553,13 @@ cdi_load_iso(cd_img_t *cdi, const char *filename)
    if (error) {
        if ((trk.file != NULL) && (trk.file->close != NULL))
            trk.file->close(trk.file);
-        return 0;
+        ret      = 3;
+        trk.file = viso_init(filename, &error);
+        if (error) {
+            if ((trk.file != NULL) && (trk.file->close != NULL))
+                trk.file->close(trk.file);
+            return 0;
+        }
    }
    trk.number       = 1;
    trk.track_number = 1;
@@ -585,7 +599,7 @@ cdi_load_iso(cd_img_t *cdi, const char *filename)
    trk.file         = NULL;
    cdi_track_push_back(cdi, &trk);

-    return 1;
+    return ret;
 }

 static int
--- a/src/cdrom/cdrom_image_viso.c
+++ b/src/cdrom/cdrom_image_viso.c
--- a/src/codegen/codegen_accumulate_x86-64.c
+++ b/src/codegen/codegen_accumulate_x86-64.c
@@ -47,17 +47,17 @@ void codegen_accumulate(int acc_reg, int delta)

 void codegen_accumulate_flush(void)
 {
+        intptr_t rip;
+
 	if (acc_regs[0].count) {
-		addbyte(0x55); /*push rbp*/
-		addbyte(0x48); /*mov rbp,val*/
-		addbyte(0xbd);
-		addlong((uint32_t) (acc_regs[0].dest_reg & 0xffffffffULL));
-		addlong((uint32_t) (acc_regs[0].dest_reg >> 32ULL));
-		addbyte(0x81); /* add d,[rbp][0],val */
-		addbyte(0x45);
-		addbyte(0x00);
+                /* To reduce the size of the generated code, we take advantage of
+                   the fact that the target offset points to _cycles within cpu_state,
+                   so we can just use our existing infrastracture for variables
+                   relative to cpu_state. */
+                addbyte(0x81); /*ADDL $acc_regs[0].count,(_cycles)*/
+                addbyte(0x45);
+                addbyte((uint8_t)cpu_state_offset(_cycles));
 		addlong(acc_regs[0].count);
-		addbyte(0x5d); /*pop rbp*/
 	}

 	acc_regs[0].count = 0;
--- a/src/codegen/codegen_accumulate_x86.c
+++ b/src/codegen/codegen_accumulate_x86.c
@@ -45,9 +45,13 @@ void codegen_accumulate(int acc_reg, int delta)
 void codegen_accumulate_flush(void)
 {
 	if (acc_regs[0].count) {
-		addbyte(0x81); /*ADD $acc_regs[0].count,acc_regs[0].dest*/
-		addbyte(0x05);
-		addlong((uint32_t) acc_regs[0].dest_reg);
+                /* To reduce the size of the generated code, we take advantage of
+                   the fact that the target offset points to _cycles within cpu_state,
+                   so we can just use our existing infrastracture for variables
+                   relative to cpu_state. */
+		addbyte(0x81); /*MOVL $acc_regs[0].count,(_cycles)*/
+		addbyte(0x45);
+		addbyte((uint8_t)cpu_state_offset(_cycles));
 		addlong(acc_regs[0].count);
 	}

--- a/src/config.c
+++ b/src/config.c
@@ -1291,6 +1291,14 @@ load_floppy_and_cdrom_drives(void)
            sprintf(temp, "fdd_%02i_check_bpb", c + 1);
            ini_section_delete_var(cat, temp);
        }
+        for (int i = 0; i < MAX_PREV_IMAGES; i++) {
+            fdd_image_history[c][i] = (char *) calloc(MAX_IMAGE_PATH_LEN + 1, sizeof(char));
+            sprintf(temp, "fdd_%02i_image_history_%02i", c + 1, i + 1);
+            p = ini_section_get_string(cat, temp, NULL);
+            if (p) {
+                sprintf(fdd_image_history[c][i], "%s", p);
+            }
+        }
    }

    memset(temp, 0x00, sizeof(temp));
@@ -2680,6 +2688,15 @@ save_floppy_and_cdrom_drives(void)
            ini_section_delete_var(cat, temp);
        else
            ini_section_set_int(cat, temp, fdd_get_check_bpb(c));
+
+        for (int i = 0; i < MAX_PREV_IMAGES; i++) {
+            sprintf(temp, "fdd_%02i_image_history_%02i", c + 1, i + 1);
+            if ((fdd_image_history[c][i] == 0) || strlen(fdd_image_history[c][i]) == 0) {
+                ini_section_delete_var(cat, temp);
+            } else {
+                ini_section_set_string(cat, temp, fdd_image_history[c][i]);
+            }
+        }
    }

    for (c = 0; c < CDROM_NUM; c++) {
--- a/src/cpu/codegen_timing_p6.c
+++ b/src/cpu/codegen_timing_p6.c
@@ -158,10 +158,13 @@ static const macro_op_t lods_op =
 };
 static const macro_op_t loop_op =
 {
-        .nr_uops = 2,
+        .nr_uops = 5,
        .decode_type = DECODE_COMPLEX,
        .uop[0] = {.type = UOP_ALU,    .latency = 1},
-        .uop[1] = {.type = UOP_BRANCH, .latency = 2}
+        .uop[1] = {.type = UOP_ALU,    .latency = 1},
+        .uop[2] = {.type = UOP_ALU,    .latency = 1},	
+        .uop[3] = {.type = UOP_ALU,    .latency = 1},			
+        .uop[4] = {.type = UOP_BRANCH, .latency = 1}
 };
 static const macro_op_t mov_reg_seg_op =
 {
--- a/src/disk/hdd.c
+++ b/src/disk/hdd.c
@@ -442,16 +442,16 @@ hdd_preset_get_num()
    return sizeof(hdd_speed_presets) / sizeof(hdd_preset_t);
 }

-char *
+const char *
 hdd_preset_getname(int preset)
 {
-    return (char *) hdd_speed_presets[preset].name;
+    return hdd_speed_presets[preset].name;
 }

-char *
+const char *
 hdd_preset_get_internal_name(int preset)
 {
-    return (char *) hdd_speed_presets[preset].internal_name;
+    return hdd_speed_presets[preset].internal_name;
 }

 int
--- a/src/floppy/fdd.c
+++ b/src/floppy/fdd.c
@@ -76,6 +76,7 @@ typedef struct {
 fdd_t fdd[FDD_NUM];

 char floppyfns[FDD_NUM][512];
+char *fdd_image_history[FDD_NUM][FLOPPY_IMAGE_HISTORY];

 pc_timer_t fdd_poll_time[FDD_NUM];

--- a/src/include/86box/cdrom.h
+++ b/src/include/86box/cdrom.h
@@ -102,7 +102,7 @@ typedef struct cdrom {
                         media status. */
        speed, cur_speed;

-    FILE *img_fp;
+    int   is_dir;
    void *priv;

    char image_path[1024],
--- a/src/include/86box/cdrom_image_backend.h
+++ b/src/include/86box/cdrom_image_backend.h
@@ -52,6 +52,7 @@ typedef struct {

    char  fn[260];
    FILE *file;
+    void *priv;
 } track_file_t;

 typedef struct {
@@ -88,4 +89,10 @@ extern int  cdi_load_cue(cd_img_t *cdi, const char *cuefile);
 extern int  cdi_has_data_track(cd_img_t *cdi);
 extern int  cdi_has_audio_track(cd_img_t *cdi);

+/* Virtual ISO functions. */
+extern int           viso_read(void *p, uint8_t *buffer, uint64_t seek, size_t count);
+extern uint64_t      viso_get_length(void *p);
+extern void          viso_close(void *p);
+extern track_file_t *viso_init(const char *dirname, int *error);
+
 #endif /*CDROM_IMAGE_BACKEND_H*/
--- a/src/include/86box/fdd.h
+++ b/src/include/86box/fdd.h
@@ -22,6 +22,7 @@
 #define EMU_FDD_H

 #define FDD_NUM          4
+#define FLOPPY_IMAGE_HISTORY         4
 #define SEEK_RECALIBRATE -999

 #ifdef __cplusplus
@@ -83,6 +84,7 @@ typedef struct {

 extern DRIVE      drives[FDD_NUM];
 extern char       floppyfns[FDD_NUM][512];
+extern char       *fdd_image_history[FDD_NUM][FLOPPY_IMAGE_HISTORY];
 extern pc_timer_t fdd_poll_time[FDD_NUM];
 extern int        ui_writeprot[FDD_NUM];

--- a/src/include/86box/hdd.h
+++ b/src/include/86box/hdd.h
@@ -203,13 +203,13 @@ extern int image_is_hdi(const char *s);
 extern int image_is_hdx(const char *s, int check_signature);
 extern int image_is_vhd(const char *s, int check_signature);

-extern double hdd_timing_write(hard_disk_t *hdd, uint32_t addr, uint32_t len);
-extern double hdd_timing_read(hard_disk_t *hdd, uint32_t addr, uint32_t len);
-extern double hdd_seek_get_time(hard_disk_t *hdd, uint32_t dst_addr, uint8_t operation, uint8_t continuous, double max_seek_time);
-int           hdd_preset_get_num();
-char         *hdd_preset_getname(int preset);
-extern char  *hdd_preset_get_internal_name(int preset);
-extern int    hdd_preset_get_from_internal_name(char *s);
-extern void   hdd_preset_apply(int hdd_id);
+extern double      hdd_timing_write(hard_disk_t *hdd, uint32_t addr, uint32_t len);
+extern double      hdd_timing_read(hard_disk_t *hdd, uint32_t addr, uint32_t len);
+extern double      hdd_seek_get_time(hard_disk_t *hdd, uint32_t dst_addr, uint8_t operation, uint8_t continuous, double max_seek_time);
+int                hdd_preset_get_num();
+const char        *hdd_preset_getname(int preset);
+extern const char *hdd_preset_get_internal_name(int preset);
+extern int         hdd_preset_get_from_internal_name(char *s);
+extern void        hdd_preset_apply(int hdd_id);

 #endif /*EMU_HDD_H*/
--- a/src/include/86box/machine.h
+++ b/src/include/86box/machine.h
@@ -789,6 +789,7 @@ extern int machine_xt_sansx16_init(const machine_t *);
 extern int machine_xt_bw230_init(const machine_t *);

 extern int machine_xt_iskra3104_init(const machine_t *);
+extern int machine_xt_pravetz16_imko4_init(const machine_t *);

 /* m_xt_compaq.c */
 extern int machine_xt_compaq_deskpro_init(const machine_t *);
--- a/src/include/86box/plat.h
+++ b/src/include/86box/plat.h
@@ -76,6 +76,10 @@ extern "C" {
 #    define atomic_bool_t atomic_bool
 #endif

+#if defined(_MSC_VER)
+#    define ssize_t intptr_t
+#endif
+
 /* Global variables residing in the platform module. */
 extern int dopause,          /* system is paused */
    mouse_capture;           /* mouse is captured in app */
--- a/src/include/86box/plat_dir.h
+++ b/src/include/86box/plat_dir.h
@@ -17,6 +17,8 @@
 #ifndef PLAT_DIR_H
 #define PLAT_DIR_H

+/* Windows needs the POSIX re-implementations */
+#if defined(_WIN32)
 #ifdef _MAX_FNAME
 #    define MAXNAMLEN _MAX_FNAME
 #else
@@ -63,5 +65,10 @@ extern void           seekdir(DIR *, long);
 extern int            closedir(DIR *);

 #define rewinddir(dirp) seekdir(dirp, 0L)
+#else
+/* On linux and macOS, use the standard functions and types */
+#include <sys/dir.h>
+#endif
+

 #endif /*PLAT_DIR_H*/
--- a/src/include/86box/resource.h
+++ b/src/include/86box/resource.h
@@ -445,7 +445,8 @@
 #define IDM_CDROM_EMPTY                0x4300
 #define IDM_CDROM_RELOAD               0x4400
 #define IDM_CDROM_IMAGE                0x4500
-#define IDM_CDROM_HOST_DRIVE           0x4600
+#define IDM_CDROM_DIR                  0x4600
+#define IDM_CDROM_HOST_DRIVE           0x4700

 #define IDM_ZIP_IMAGE_NEW              0x5200
 #define IDM_ZIP_IMAGE_EXISTING         0x5300
--- a/src/include/86box/video.h
+++ b/src/include/86box/video.h
@@ -509,6 +509,7 @@ extern const device_t ibm_ps1_2121_device;
 extern const device_t tvga8900b_device;
 extern const device_t tvga8900d_device;
 extern const device_t tvga9000b_device;
+extern const device_t nec_sv9000_device;

 /* IBM VGA */
 extern const device_t vga_device;
--- a/src/machine/m_xt.c
+++ b/src/machine/m_xt.c
@@ -328,6 +328,24 @@ machine_xt_iskra3104_init(const machine_t *model)
    return ret;
 }

+int
+machine_xt_pravetz16_imko4_init(const machine_t *model)
+{
+	int ret;
+    
+    ret = bios_load_linear("roms/machines/pravetz16/BIOS_IMKO4_FE00.bin",
+			   0x000fe000, 8192, 0);
+
+    if (bios_only || !ret)
+	    return ret;
+
+    device_add(&keyboard_at_device);
+
+    machine_xt_common_init(model);
+
+    return ret;
+}
+
 int
 machine_xt_pc4i_init(const machine_t *model)
 {
--- a/src/machine/machine_table.c
+++ b/src/machine/machine_table.c
@@ -1611,6 +1611,42 @@ const machine_t machines[] = {
        .snd_device = NULL,
        .net_device = NULL
    },
+    {
+        .name = "[8088] Pravetz 16 / IMKO-4",
+        .internal_name = "pravetz16",
+        .type = MACHINE_TYPE_8088,
+        .chipset = MACHINE_CHIPSET_DISCRETE,
+        .init = machine_xt_pravetz16_imko4_init,
+        .pad = 0,
+        .pad0 = 0,
+        .pad1 = MACHINE_AVAILABLE,
+        .pad2 = 0,
+        .cpu = {
+            .package = CPU_PKG_8088,
+            .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_PC,
+        .flags = MACHINE_FLAGS_NONE,
+        .ram = {
+            .min = 64,
+            .max = 640,
+            .step = 64
+        },
+        .nvrmask = 0,
+        .kbc = KBC_IBM_PC_XT,
+        .kbc_p1 = 0xff00,
+        .gpio = 0xffffffff,
+        .device = NULL,
+        .vid_device = NULL,
+        .snd_device = NULL,
+        .net_device = NULL
+    },

    /* 8086 Machines */
    {
--- a/src/qt/languages/cs-CZ.po
+++ b/src/qt/languages/cs-CZ.po
@@ -229,6 +229,9 @@ msgstr "&Načíst znova předchozí obraz"
 msgid "&Image"
 msgstr "&Obraz..."

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "&Cílová snímková frekvence"

--- a/src/qt/languages/de-DE.po
+++ b/src/qt/languages/de-DE.po
@@ -229,6 +229,9 @@ msgstr "&Voriges Image neu laden"
 msgid "&Image"
 msgstr "&Image"

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "Ziel&framerate"

--- a/src/qt/languages/en-GB.po
+++ b/src/qt/languages/en-GB.po
@@ -229,6 +229,9 @@ msgstr "&Reload previous image"
 msgid "&Image"
 msgstr "&Image"

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "Target &framerate"

--- a/src/qt/languages/en-US.po
+++ b/src/qt/languages/en-US.po
@@ -229,6 +229,9 @@ msgstr "&Reload previous image"
 msgid "&Image"
 msgstr "&Image"

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "Target &framerate"

--- a/src/qt/languages/es-ES.po
+++ b/src/qt/languages/es-ES.po
@@ -229,6 +229,9 @@ msgstr "&Recargar imagen previa"
 msgid "&Image"
 msgstr "&Imagen..."

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "&Tasa de refresco objetivo"

--- a/src/qt/languages/fi-FI.po
+++ b/src/qt/languages/fi-FI.po
@@ -229,6 +229,9 @@ msgstr "&Lataa edellinen levykuva uudelleen"
 msgid "&Image"
 msgstr "L&evykuva"

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "&Kuvataajuustavoite"

--- a/src/qt/languages/fr-FR.po
+++ b/src/qt/languages/fr-FR.po
@@ -229,6 +229,9 @@ msgstr "&Recharger image précedente"
 msgid "&Image"
 msgstr "&Image"

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "&Taux de rafraîchissement cible"

--- a/src/qt/languages/hr-HR.po
+++ b/src/qt/languages/hr-HR.po
@@ -229,6 +229,9 @@ msgstr "&Ponovo učitaj prethodnu sliku"
 msgid "&Image"
 msgstr "&Slika"

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "&Ciljni broj okvira u sekundi"

--- a/src/qt/languages/hu-HU.po
+++ b/src/qt/languages/hu-HU.po
@@ -229,6 +229,9 @@ msgstr "Előző képfájl &újratöltése"
 msgid "&Image"
 msgstr "&Meglévő képfájl &megnyitása..."

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "Cél &képkockasebesség"

--- a/src/qt/languages/it-IT.po
+++ b/src/qt/languages/it-IT.po
@@ -229,6 +229,9 @@ msgstr "&Ricarica l'immagine precedente"
 msgid "&Image"
 msgstr "&Immagine"

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "Imposta obiettivo &fotogrammi"

--- a/src/qt/languages/ja-JP.po
+++ b/src/qt/languages/ja-JP.po
@@ -229,6 +229,9 @@ msgstr "前のイメージを再読み込み(&R)"
 msgid "&Image"
 msgstr "イメージ(&I)"

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "目標フレームレート(&F)"

--- a/src/qt/languages/ko-KR.po
+++ b/src/qt/languages/ko-KR.po
@@ -229,6 +229,9 @@ msgstr "이전 이미지 다시 불러오기(&R)"
 msgid "&Image"
 msgstr "이미지(&I)"

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "목표 프레임 레이트(&F)"

--- a/src/qt/languages/pl-PL.po
+++ b/src/qt/languages/pl-PL.po
@@ -229,6 +229,9 @@ msgstr "&Przeładuj poprzedni obraz"
 msgid "&Image"
 msgstr "&Obraz"

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "Docelowa &liczba klatek na sekundę"

--- a/src/qt/languages/pt-BR.po
+++ b/src/qt/languages/pt-BR.po
@@ -229,6 +229,9 @@ msgstr "&Recarregar imagem anterior"
 msgid "&Image"
 msgstr "&Imagem"

+msgid "&Folder..."
+msgstr "&Pasta..."
+
 msgid "Target &framerate"
 msgstr "&Taxa de quadro pretendida"

--- a/src/qt/languages/pt-PT.po
+++ b/src/qt/languages/pt-PT.po
@@ -229,6 +229,9 @@ msgstr "&Recarregar imagem anterior"
 msgid "&Image"
 msgstr "&Imagem"

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "&Taxa de quadros de destino"

--- a/src/qt/languages/ru-RU.po
+++ b/src/qt/languages/ru-RU.po
@@ -229,6 +229,9 @@ msgstr "&Снова загрузить предыдущий образ"
 msgid "&Image"
 msgstr "&Образ..."

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "Целевая &частота кадров"

--- a/src/qt/languages/sl-SI.po
+++ b/src/qt/languages/sl-SI.po
@@ -229,6 +229,9 @@ msgstr "&Naloži zadnjo sliko"
 msgid "&Image"
 msgstr "&Slika"

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "&Ciljno št. sličic na sekundo"

--- a/src/qt/languages/tr-TR.po
+++ b/src/qt/languages/tr-TR.po
@@ -229,6 +229,9 @@ msgstr "&Önceki imajı seç"
 msgid "&Image"
 msgstr "&İmaj seç"

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "Hedef &kare oranı"

--- a/src/qt/languages/uk-UA.po
+++ b/src/qt/languages/uk-UA.po
@@ -229,6 +229,9 @@ msgstr "&Знову завантажити попередній образ"
 msgid "&Image"
 msgstr "&Образ..."

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "Цільова &частота кадрів"

--- a/src/qt/languages/zh-CN.po
+++ b/src/qt/languages/zh-CN.po
@@ -229,6 +229,9 @@ msgstr "载入上一个镜像(&R)"
 msgid "&Image"
 msgstr "镜像(&I)"

+msgid "&Folder..."
+msgstr "&Folder..."
+
 msgid "Target &framerate"
 msgstr "目标帧率(&F)"

--- a/src/qt/qt_mainwindow.cpp
+++ b/src/qt/qt_mainwindow.cpp
@@ -202,7 +202,8 @@ MainWindow::MainWindow(QWidget *parent) :
            }
        }
 #endif
-        ui->actionPause->setChecked(dopause);
+        ui->actionPause->setChecked(false);
+        ui->actionPause->setCheckable(false);
    });
    connect(this, &MainWindow::getTitleForNonQtThread, this, &MainWindow::getTitle_, Qt::BlockingQueuedConnection);

@@ -753,6 +754,10 @@ void MainWindow::on_actionCtrl_Alt_Esc_triggered() {

 void MainWindow::on_actionPause_triggered() {
    plat_pause(dopause ^ 1);
+    auto pause_icon   = dopause ? QIcon(":/menuicons/win/icons/run.ico") : QIcon(":/menuicons/win/icons/pause.ico");
+    auto tooltip_text = dopause ? QString(tr("Resume execution")) : QString(tr("Pause execution"));
+    ui->actionPause->setIcon(pause_icon);
+    ui->actionPause->setToolTip(tooltip_text);
 }

 void MainWindow::on_actionExit_triggered() {
--- a/src/qt/qt_mediahistorymanager.cpp
+++ b/src/qt/qt_mediahistorymanager.cpp
@@ -21,10 +21,15 @@
 #include <QMetaEnum>
 #include <QStringBuilder>
 #include <utility>
-
-#include "86box/cdrom.h"
 #include "qt_mediahistorymanager.hpp"

+extern "C"
+{
+#include <86box/timer.h>
+#include <86box/cdrom.h>
+#include <86box/fdd.h>
+}
+
 namespace ui {

 MediaHistoryManager::MediaHistoryManager() {
@@ -158,6 +163,9 @@ void MediaHistoryManager::initialDeduplication()
                case ui::MediaType::Optical:
                    current_image = cdrom[device_index].image_path;
                    break;
+                case ui::MediaType::Floppy:
+                    current_image = floppyfns[device_index];
+                    break;
                default:
                    continue;
                    break;
@@ -180,6 +188,8 @@ char ** MediaHistoryManager::getEmuHistoryVarForType(ui::MediaType type, int ind
    switch (type) {
        case ui::MediaType::Optical:
            return &cdrom[index].image_history[0];
+        case ui::MediaType::Floppy:
+            return &fdd_image_history[index][0];
        default:
            return nullptr;

--- a/src/qt/qt_mediahistorymanager.hpp
+++ b/src/qt/qt_mediahistorymanager.hpp
@@ -59,7 +59,8 @@ namespace ui {
    // Used to iterate over all supported types when preparing data structures
    // Also useful to indicate which types support history
    static const MediaType AllSupportedMediaHistoryTypes[] = {
-        MediaType::Optical
+        MediaType::Optical,
+        MediaType::Floppy,
    };

    class MediaHistoryManager {
@@ -87,7 +88,7 @@ namespace ui {

        // Main hash of hash of vector of strings
        master_list_t       master_list;
-        const master_list_t &getMasterList() const;
+        [[nodiscard]] const master_list_t &getMasterList() const;
        void                 setMasterList(const master_list_t &masterList);

        device_index_list_t index_list, empty_device_index_list;
--- a/src/qt/qt_mediamenu.cpp
+++ b/src/qt/qt_mediamenu.cpp
@@ -105,6 +105,11 @@ void MediaMenu::refresh(QMenu *parentMenu) {
        menu->addAction(tr("&Existing image..."), [this, i]() { floppySelectImage(i, false); });
        menu->addAction(tr("Existing image (&Write-protected)..."), [this, i]() { floppySelectImage(i, true); });
        menu->addSeparator();
+        for (int slot = 0; slot < MAX_PREV_IMAGES; slot++) {
+            floppyImageHistoryPos[slot] = menu->children().count();
+            menu->addAction(QString::asprintf(tr("Image %i").toUtf8().constData(), slot), [this, i, slot]() { floppyMenuSelect(i, slot); })->setCheckable(false);
+        }
+        menu->addSeparator();
        floppyExportPos = menu->children().count();
        menu->addAction(tr("E&xport to 86F..."), [this, i]() { floppyExportTo86f(i); });
        menu->addSeparator();
@@ -120,7 +125,8 @@ void MediaMenu::refresh(QMenu *parentMenu) {
        cdromMutePos = menu->children().count();
        menu->addAction(tr("&Mute"), [this, i]() { cdromMute(i); })->setCheckable(true);
        menu->addSeparator();
-        menu->addAction(tr("&Image..."), [this, i]() { cdromMount(i); })->setCheckable(false);
+        menu->addAction(tr("&Image..."), [this, i]() { cdromMount(i, 0); })->setCheckable(false);
+        menu->addAction(tr("&Folder..."), [this, i]() { cdromMount(i, 1); })->setCheckable(false);
        menu->addSeparator();
        for (int slot = 0; slot < MAX_PREV_IMAGES; slot++) {
            cdromImageHistoryPos[slot] = menu->children().count();
@@ -128,6 +134,7 @@ void MediaMenu::refresh(QMenu *parentMenu) {
        }
        menu->addSeparator();
        cdromImagePos = menu->children().count();
+        cdromDirPos = menu->children().count();
        menu->addAction(tr("E&ject"), [this, i]() { cdromEject(i); })->setCheckable(false);
        cdromMenus[i] = menu;
        cdromUpdateMenu(i);
@@ -328,6 +335,7 @@ void MediaMenu::floppySelectImage(int i, bool wp) {
 }

 void MediaMenu::floppyMount(int i, const QString &filename, bool wp) {
+    auto previous_image = QFileInfo(floppyfns[i]);
    fdd_close(i);
    ui_writeprot[i] = wp ? 1 : 0;
    if (! filename.isEmpty()) {
@@ -335,12 +343,14 @@ void MediaMenu::floppyMount(int i, const QString &filename, bool wp) {
        fdd_load(i, filenameBytes.data());
    }
    ui_sb_update_icon_state(SB_FLOPPY | i, filename.isEmpty() ? 1 : 0);
+    mhm.addImageToHistory(i, ui::MediaType::Floppy, previous_image.filePath(), filename);
    floppyUpdateMenu(i);
    ui_sb_update_tip(SB_FLOPPY | i);
    config_save();
 }

 void MediaMenu::floppyEject(int i) {
+    mhm.addImageToHistory(i, ui::MediaType::Floppy, floppyfns[i], QString());
    fdd_close(i);
    ui_sb_update_icon_state(SB_FLOPPY | i, 1);
    floppyUpdateMenu(i);
@@ -376,11 +386,22 @@ void MediaMenu::floppyUpdateMenu(int i) {
    ejectMenu->setText(QString::asprintf(tr("Eject %s").toUtf8().constData(), name.isEmpty() ? QString().toUtf8().constData() :  fi.fileName().toUtf8().constData()));
    exportMenu->setEnabled(!name.isEmpty());

+    for (int slot = 0; slot < MAX_PREV_IMAGES; slot++) {
+        updateImageHistory(i, slot, ui::MediaType::Floppy);
+    }
+
    int type = fdd_get_type(i);
    //floppyMenus[i]->setTitle(tr("Floppy %1 (%2): %3").arg(QString::number(i+1), fdd_getname(type), name.isEmpty() ? tr("(empty)") : name));
    floppyMenus[i]->setTitle(QString::asprintf(tr("Floppy %i (%s): %ls").toUtf8().constData(), i + 1, fdd_getname(type), name.isEmpty() ? tr("(empty)").toStdU16String().data() : name.toStdU16String().data()));
 }

+void MediaMenu::floppyMenuSelect(int index, int slot) {
+    QString filename = mhm.getImageForSlot(index, slot, ui::MediaType::Floppy);
+    floppyMount(index, filename.toUtf8().constData(), false);
+    floppyUpdateMenu(index);
+    ui_sb_update_tip(SB_FLOPPY | index);
+}
+
 void MediaMenu::cdromMute(int i) {
    cdrom[i].sound_on ^= 1;
    config_save();
@@ -415,16 +436,23 @@ void MediaMenu::cdromMount(int i, const QString &filename)
    config_save();
 }

-void MediaMenu::cdromMount(int i) {
+void MediaMenu::cdromMount(int i, int dir) {
+    QString filename;
+    QFileInfo fi(cdrom[i].image_path);

-    auto filename = QFileDialog::getOpenFileName(
-        parentWidget,
-        QString(),
-        getMediaOpenDirectory(),
-        tr("CD-ROM images") %
-        util::DlgFilter({ "iso","cue" }) %
-        tr("All files") %
-        util::DlgFilter({ "*" }, true));
+    if (dir) {
+        filename = QFileDialog::getExistingDirectory(
+            parentWidget);
+    } else {
+        filename = QFileDialog::getOpenFileName(
+            parentWidget,
+            QString(),
+            QString(),
+            tr("CD-ROM images") %
+            util::DlgFilter({ "iso","cue" }) %
+            tr("All files") %
+            util::DlgFilter({ "*" }, true));
+    }

    if (filename.isEmpty()) {
        return;
@@ -501,8 +529,9 @@ void MediaMenu::cdromUpdateMenu(int i) {
    imageMenu->setEnabled(!name.isEmpty());
    imageMenu->setText(QString::asprintf(tr("Eject %s").toUtf8().constData(), name.isEmpty() ? QString().toUtf8().constData() :  fi.fileName().toUtf8().constData()));

-    for (int slot = 0; slot < MAX_PREV_IMAGES; slot++)
+    for (int slot = 0; slot < MAX_PREV_IMAGES; slot++) {
        updateImageHistory(i, slot, ui::MediaType::Optical);
+    }

    QString busName = tr("Unknown Bus");
    switch (cdrom[i].bus_type) {
--- a/src/qt/qt_mediamenu.hpp
+++ b/src/qt/qt_mediamenu.hpp
@@ -37,11 +37,12 @@ public:
    void floppySelectImage(int i, bool wp);
    void floppyMount(int i, const QString& filename, bool wp);
    void floppyEject(int i);
+    void floppyMenuSelect(int index, int slot);
    void floppyExportTo86f(int i);
    void floppyUpdateMenu(int i);

    void cdromMute(int i);
-    void cdromMount(int i);
+    void cdromMount(int i, int dir);
    void cdromMount(int i, const QString& filename);
    void cdromEject(int i);
    void cdromReload(int index, int slot);
@@ -94,6 +95,7 @@ private:
    int cdromMutePos;
    int cdromReloadPos;
    int cdromImagePos;
+    int cdromDirPos;
    int cdromImageHistoryPos[MAX_PREV_IMAGES];
    int floppyImageHistoryPos[MAX_PREV_IMAGES];

--- a/src/qt/qt_platform.cpp
+++ b/src/qt/qt_platform.cpp
@@ -161,7 +161,13 @@ plat_timer_read(void)
 FILE *
 plat_fopen(const char *path, const char *mode)
 {
+#if defined(Q_OS_MACOS) or defined(Q_OS_LINUX)
+    QFileInfo fi(path);
+    QString filename = (fi.isRelative() && !fi.filePath().isEmpty()) ? usr_path + fi.filePath() : fi.filePath();
+    return fopen(filename.toUtf8().constData(), mode);
+#else
    return fopen(QString::fromUtf8(path).toLocal8Bit(), mode);
+#endif
 }

 FILE *
@@ -169,7 +175,7 @@ plat_fopen64(const char *path, const char *mode)
 {
 #if defined(Q_OS_MACOS) or defined(Q_OS_LINUX)
    QFileInfo fi(path);
-    QString filename = fi.isRelative() ? usr_path + fi.filePath() : fi.filePath();
+    QString filename = (fi.isRelative() && !fi.filePath().isEmpty()) ? usr_path + fi.filePath() : fi.filePath();
    return fopen(filename.toUtf8().constData(), mode);
 #else
    return fopen(QString::fromUtf8(path).toLocal8Bit(), mode);
--- a/src/qt/qt_settingsfloppycdrom.cpp
+++ b/src/qt/qt_settingsfloppycdrom.cpp
@@ -154,7 +154,7 @@ void SettingsFloppyCDROM::save() {
    /* Removable devices category */
    model = ui->tableViewCDROM->model();
    for (int i = 0; i < CDROM_NUM; i++) {
-	cdrom[i].img_fp = NULL;
+	cdrom[i].is_dir = 0;
        cdrom[i].priv = NULL;
        cdrom[i].ops = NULL;
        cdrom[i].image = NULL;
--- a/src/video/vid_table.c
+++ b/src/video/vid_table.c
@@ -139,6 +139,7 @@ video_cards[] = {
    { &tvga8900b_device                              },
    { &tvga8900d_device                              },
    { &tvga9000b_device                              },
+    { &nec_sv9000_device                             },
    { &et4000k_isa_device                            },
    { &et2000_device                                 },
    { &et4000_isa_device                             },
--- a/src/video/vid_tvga.c
+++ b/src/video/vid_tvga.c
@@ -35,9 +35,10 @@
 #define TVGA9000B_ID     0x23
 #define TVGA8900CLD_ID   0x33

-#define ROM_TVGA_8900B   "roms/video/tvga/tvga8900b.vbi"
-#define ROM_TVGA_8900CLD "roms/video/tvga/trident.bin"
-#define ROM_TVGA_9000B   "roms/video/tvga/tvga9000b.bin"
+#define ROM_TVGA_8900B            "roms/video/tvga/tvga8900b.vbi"
+#define ROM_TVGA_8900CLD          "roms/video/tvga/trident.bin"
+#define ROM_TVGA_9000B            "roms/video/tvga/tvga9000b.bin"
+#define ROM_TVGA_9000B_NEC_SV9000 "roms/video/tvga/SV9000.VBI"

 typedef struct tvga_t {
    mem_mapping_t linear_mapping;
@@ -389,7 +390,9 @@ tvga_init(const device_t *info)
    tvga_t     *tvga = malloc(sizeof(tvga_t));
    memset(tvga, 0, sizeof(tvga_t));

-    if (info->local == TVGA9000B_ID) {
+    tvga->card_id = info->local & 0xFF;
+
+    if (tvga->card_id == TVGA9000B_ID) {
        video_inform(VIDEO_FLAG_TYPE_SPECIAL, &timing_tvga9000);
        tvga->vram_size = 512 << 10;
    } else {
@@ -399,9 +402,7 @@ tvga_init(const device_t *info)

    tvga->vram_mask = tvga->vram_size - 1;

-    tvga->card_id = info->local;
-
-    switch (info->local) {
+    switch (tvga->card_id) {
        case TVGA8900B_ID:
            bios_fn = ROM_TVGA_8900B;
            break;
@@ -409,7 +410,7 @@ tvga_init(const device_t *info)
            bios_fn = ROM_TVGA_8900CLD;
            break;
        case TVGA9000B_ID:
-            bios_fn = ROM_TVGA_9000B;
+            bios_fn = (info->local & 0x100) ? ROM_TVGA_9000B_NEC_SV9000 : ROM_TVGA_9000B;
            break;
        default:
            free(tvga);
@@ -424,7 +425,7 @@ tvga_init(const device_t *info)
              NULL,
              NULL);

-    if (info->local != TVGA9000B_ID)
+    if (tvga->card_id != TVGA9000B_ID)
        tvga->svga.ramdac = device_add(&tkd8001_ramdac_device);

    io_sethandler(0x03c0, 0x0020, tvga_in, NULL, NULL, tvga_out, NULL, NULL, tvga);
@@ -450,6 +451,12 @@ tvga9000b_available(void)
    return rom_present(ROM_TVGA_9000B);
 }

+static int
+tvga9000b_nec_sv9000_available(void)
+{
+    return rom_present(ROM_TVGA_9000B_NEC_SV9000);
+}
+
 void
 tvga_close(void *p)
 {
@@ -549,3 +556,17 @@ const device_t tvga9000b_device = {
    .force_redraw = tvga_force_redraw,
    .config = NULL
 };
+
+const device_t nec_sv9000_device = {
+    .name = "NEC SV9000 (Trident TVGA 9000B)",
+    .internal_name = "nec_sv9000",
+    .flags = DEVICE_ISA,
+    .local = TVGA9000B_ID | 0x100,
+    .init = tvga_init,
+    .close = tvga_close,
+    .reset = NULL,
+    { .available = tvga9000b_nec_sv9000_available },
+    .speed_changed = tvga_speed_changed,
+    .force_redraw = tvga_force_redraw,
+    .config = NULL
+};
--- a/src/win/Makefile.mingw
+++ b/src/win/Makefile.mingw
@@ -638,7 +638,7 @@ MINIVHDOBJ  := cwalk.o libxml2_encoding.o minivhd_convert.o \
            minivhd_struct_rw.o minivhd_util.o

 CDROMOBJ	:= cdrom.o \
-		    cdrom_image_backend.o cdrom_image.o
+		    cdrom_image_backend.o cdrom_image_viso.o cdrom_image.o

 ZIPOBJ		:= zip.o

--- a/src/win/languages/cs-CZ.rc
+++ b/src/win/languages/cs-CZ.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "&Načíst znova předchozí obraz",		IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Obraz...",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/de-DE.rc
+++ b/src/win/languages/de-DE.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "&Voriges Image neu laden",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Image",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/en-GB.rc
+++ b/src/win/languages/en-GB.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "&Reload previous image",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Image",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/en-US.rc
+++ b/src/win/languages/en-US.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "&Reload previous image",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Image",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/es-ES.rc
+++ b/src/win/languages/es-ES.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "&Recargar imagen previa",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Imagen...",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/fi-FI.rc
+++ b/src/win/languages/fi-FI.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "&Lataa edellinen levykuva uudelleen",                 IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "L&evykuva",                                           IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/fr-FR.rc
+++ b/src/win/languages/fr-FR.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "&Recharger image précedente",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Image",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/hr-HR.rc
+++ b/src/win/languages/hr-HR.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "&Ponovo učitaj prethodnu sliku",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Slika",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/hu-HU.rc
+++ b/src/win/languages/hu-HU.rc
@@ -182,6 +182,7 @@ BEGIN
        MENUITEM "Előző képfájl &újratöltése",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Meglévő képfájl &megnyitása...",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/it-IT.rc
+++ b/src/win/languages/it-IT.rc
@@ -178,6 +178,7 @@ BEGIN
        MENUITEM "&Ricarica l'immagine precedente",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Immagine",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/ja-JP.rc
+++ b/src/win/languages/ja-JP.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "前のイメージを再読み込み(&R)",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "イメージ(&I)",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/ko-KR.rc
+++ b/src/win/languages/ko-KR.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "이전 이미지 다시 불러오기(&R)",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "이미지(&I)",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/pl-PL.rc
+++ b/src/win/languages/pl-PL.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "&Przeładuj poprzedni obraz",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Obraz",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/pt-BR.rc
+++ b/src/win/languages/pt-BR.rc
@@ -180,6 +180,7 @@ BEGIN
        MENUITEM "&Recarregar imagem anterior",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Imagem",					IDM_CDROM_IMAGE
+        MENUITEM "&Pasta",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/pt-PT.rc
+++ b/src/win/languages/pt-PT.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "&Recarregar imagem anterior",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Imagem",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/ru-RU.rc
+++ b/src/win/languages/ru-RU.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "&Снова загрузить предыдущий образ",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Образ...",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/sl-SI.rc
+++ b/src/win/languages/sl-SI.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "&Naloži zadnjo sliko",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Slika",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/tr-TR.rc
+++ b/src/win/languages/tr-TR.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "&Önceki imajı seç",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&İmaj seç",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/uk-UA.rc
+++ b/src/win/languages/uk-UA.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "&Знову завантажити попередній образ",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "&Образ...",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/languages/zh-CN.rc
+++ b/src/win/languages/zh-CN.rc
@@ -177,6 +177,7 @@ BEGIN
        MENUITEM "载入上一个镜像(&R)",			IDM_CDROM_RELOAD
        MENUITEM SEPARATOR
        MENUITEM "镜像(&I)",					IDM_CDROM_IMAGE
+        MENUITEM "&Folder",					IDM_CDROM_DIR
    END
 END

--- a/src/win/win_dialog.c
+++ b/src/win/win_dialog.c
@@ -172,7 +172,8 @@ file_dlg_w(HWND hwnd, WCHAR *f, WCHAR *fn, WCHAR *title, int save)
     * not use the contents of szFile to initialize itself.
     */
    memset(ofn.lpstrFile, 0x00, 512 * sizeof(WCHAR));
-    memcpy(ofn.lpstrFile, fn, (wcslen(fn) << 1) + 2);
+    if (fn)
+        memcpy(ofn.lpstrFile, fn, (wcslen(fn) << 1) + 2);
    ofn.nMaxFile        = sizeof_w(wopenfilestring);
    ofn.lpstrFilter     = f;
    ofn.nFilterIndex    = 1;
@@ -211,11 +212,12 @@ file_dlg(HWND hwnd, WCHAR *f, char *fn, char *title, int save)
 {
    WCHAR ufn[512], title_buf[512];

-    mbstoc16s(ufn, fn, strlen(fn) + 1);
+    if (fn)
+        mbstoc16s(ufn, fn, strlen(fn) + 1);
    if (title)
        mbstoc16s(title_buf, title, sizeof title_buf);

-    return (file_dlg_w(hwnd, f, ufn, title ? title_buf : NULL, save));
+    return (file_dlg_w(hwnd, f, fn ? ufn : NULL, title ? title_buf : NULL, save));
 }

 int
--- a/src/win/win_media_menu.c
+++ b/src/win/win_media_menu.c
@@ -3,6 +3,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <windows.h>
+#include <shlobj.h>
 #include <86box/86box.h>
 #include <86box/cdrom.h>
 #include <86box/config.h>
@@ -294,11 +295,13 @@ media_menu_update_cdrom(int id)
        CheckMenuItem(menus[i], IDM_CDROM_MUTE | id, MF_BYCOMMAND | MF_UNCHECKED);

    if (cdrom[id].host_drive == 200) {
-        CheckMenuItem(menus[i], IDM_CDROM_IMAGE | id, MF_BYCOMMAND | MF_CHECKED);
+        CheckMenuItem(menus[i], IDM_CDROM_IMAGE | id, MF_BYCOMMAND | (cdrom[id].is_dir ? MF_UNCHECKED : MF_CHECKED));
+        CheckMenuItem(menus[i], IDM_CDROM_DIR | id, MF_BYCOMMAND | (cdrom[id].is_dir ? MF_CHECKED : MF_UNCHECKED));
        CheckMenuItem(menus[i], IDM_CDROM_EMPTY | id, MF_BYCOMMAND | MF_UNCHECKED);
    } else {
        cdrom[id].host_drive = 0;
        CheckMenuItem(menus[i], IDM_CDROM_IMAGE | id, MF_BYCOMMAND | MF_UNCHECKED);
+        CheckMenuItem(menus[i], IDM_CDROM_DIR | id, MF_BYCOMMAND | MF_UNCHECKED);
        CheckMenuItem(menus[i], IDM_CDROM_EMPTY | id, MF_BYCOMMAND | MF_CHECKED);
    }

@@ -629,11 +632,32 @@ media_menu_proc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
            break;

        case IDM_CDROM_IMAGE:
-            if (!file_dlg_st(hwnd, IDS_2140, cdrom[id].image_path, NULL, 0)) {
+            if (!file_dlg_st(hwnd, IDS_2140, cdrom[id].is_dir ? NULL : cdrom[id].image_path, NULL, 0)) {
                cdrom_mount(id, openfilestring);
            }
            break;

+        case IDM_CDROM_DIR:
+            BROWSEINFO bi = {
+                .hwndOwner = hwnd,
+                .ulFlags   = BIF_EDITBOX
+            };
+            OleInitialize(NULL);
+            int old_dopause = dopause;
+            plat_pause(1);
+            LPITEMIDLIST pidl = SHBrowseForFolder(&bi);
+            plat_pause(old_dopause);
+            plat_chdir(usr_path);
+            if (pidl) {
+                wchar_t wbuf[MAX_PATH + 1];
+                if (SHGetPathFromIDList(pidl, wbuf)) {
+                    char buf[MAX_PATH + 1];
+                    c16stombs(buf, wbuf, sizeof(buf) - 1);
+                    cdrom_mount(id, buf);
+                }
+            }
+            break;
+
        case IDM_ZIP_IMAGE_NEW:
            NewFloppyDialogCreate(hwnd, id | 0x80, 0); /* NewZIPDialogCreate */
            break;
--- a/src/win/win_new_floppy.c
+++ b/src/win/win_new_floppy.c
@@ -51,27 +51,27 @@ typedef struct {
 } disk_size_t;

 static const disk_size_t disk_sizes[14] = {
-//						{	1,  1, 2, 1, 1,  77, 26, 0,    0, 4, 2,  6,  68 },		/* 250k 8" */
-//						{	1,  2, 2, 1, 1,  77, 26, 0,    0, 4, 2,  6,  68 },		/* 500k 8" */
-//						{	1,  1, 2, 1, 1,  77,  8, 3,    0, 1, 2,  2, 192 },		/* 616k 8" */
-//						{	1,  2, 0, 1, 1,  77,  8, 3,    0, 1, 2,  2, 192 },		/* 1232k 8" */
-						{	0,  1, 2, 1, 0,  40,  8, 2, 0xfe, 1, 2,  1,  64 },		/* 160k */
-						{	0,  1, 2, 1, 0,  40,  9, 2, 0xfc, 1, 2,  2,  64 },		/* 180k */
-						{	0,  2, 2, 1, 0,  40,  8, 2, 0xff, 2, 2,  1, 112 },		/* 320k */
-						{	0,  2, 2, 1, 0,  40,  9, 2, 0xfd, 2, 2,  2, 112 },		/* 360k */
-						{	0,  2, 2, 1, 0,  80,  8, 2, 0xfb, 2, 2,  2, 112 },		/* 640k */
-						{	0,  2, 2, 1, 0,  80,  9, 2, 0xf9, 2, 2,  3, 112 },		/* 720k */
-						{	1,  2, 0, 1, 1,  80, 15, 2, 0xf9, 1, 2,  7, 224 },		/* 1.2M */
-						{	1,  2, 0, 1, 1,  77,  8, 3, 0xfe, 1, 2,  2, 192 },		/* 1.25M */
-						{	1,  2, 0, 1, 0,  80, 18, 2, 0xf0, 1, 2,  9, 224 },		/* 1.44M */
-						{	1,  2, 0, 1, 0,  80, 21, 2, 0xf0, 2, 2,  5,  16 },		/* DMF cluster 1024 */
-						{	1,  2, 0, 1, 0,  80, 21, 2, 0xf0, 4, 2,  3,  16 },		/* DMF cluster 2048 */
-						{	2,  2, 3, 1, 0,  80, 36, 2, 0xf0, 2, 2,  9, 240 },		/* 2.88M */
-						{	0, 64, 0, 0, 0,  96, 32, 2,    0, 0, 0,  0,   0 },		/* ZIP 100 */
-						{	0, 64, 0, 0, 0, 239, 32, 2,    0, 0, 0,  0,   0 }	};	/* ZIP 250 */
-
-static unsigned char	*empty;
+  //						{	1,  1, 2, 1, 1,  77, 26, 0,    0, 4, 2,  6,  68 },		/* 250k 8" */
+  //						{	1,  2, 2, 1, 1,  77, 26, 0,    0, 4, 2,  6,  68 },		/* 500k 8" */
+  //						{	1,  1, 2, 1, 1,  77,  8, 3,    0, 1, 2,  2, 192 },		/* 616k 8" */
+  //						{	1,  2, 0, 1, 1,  77,  8, 3,    0, 1, 2,  2, 192 },		/* 1232k 8" */
+    {0,  1,  2, 1, 0, 40,  8,  2, 0xfe, 1, 2, 1, 64 }, /* 160k */
+    { 0, 1,  2, 1, 0, 40,  9,  2, 0xfc, 1, 2, 2, 64 }, /* 180k */
+    { 0, 2,  2, 1, 0, 40,  8,  2, 0xff, 2, 2, 1, 112}, /* 320k */
+    { 0, 2,  2, 1, 0, 40,  9,  2, 0xfd, 2, 2, 2, 112}, /* 360k */
+    { 0, 2,  2, 1, 0, 80,  8,  2, 0xfb, 2, 2, 2, 112}, /* 640k */
+    { 0, 2,  2, 1, 0, 80,  9,  2, 0xf9, 2, 2, 3, 112}, /* 720k */
+    { 1, 2,  0, 1, 1, 80,  15, 2, 0xf9, 1, 2, 7, 224}, /* 1.2M */
+    { 1, 2,  0, 1, 1, 77,  8,  3, 0xfe, 1, 2, 2, 192}, /* 1.25M */
+    { 1, 2,  0, 1, 0, 80,  18, 2, 0xf0, 1, 2, 9, 224}, /* 1.44M */
+    { 1, 2,  0, 1, 0, 80,  21, 2, 0xf0, 2, 2, 5, 16 }, /* DMF cluster 1024 */
+    { 1, 2,  0, 1, 0, 80,  21, 2, 0xf0, 4, 2, 3, 16 }, /* DMF cluster 2048 */
+    { 2, 2,  3, 1, 0, 80,  36, 2, 0xf0, 2, 2, 9, 240}, /* 2.88M */
+    { 0, 64, 0, 0, 0, 96,  32, 2, 0,    0, 0, 0, 0  }, /* ZIP 100 */
+    { 0, 64, 0, 0, 0, 239, 32, 2, 0,    0, 0, 0, 0  }
+}; /* ZIP 250 */

+static unsigned char *empty;

 static int
 create_86f(char *file_name, disk_size_t disk_size, uint8_t rpm_mode)
--- a/src/win/win_settings.c
+++ b/src/win/win_settings.c
@@ -595,7 +595,7 @@ win_settings_save(void)
    /* Removable devices category */
    memcpy(cdrom, temp_cdrom, CDROM_NUM * sizeof(cdrom_t));
    for (i = 0; i < CDROM_NUM; i++) {
-        cdrom[i].img_fp      = NULL;
+	cdrom[i].is_dir      = 0;
        cdrom[i].priv        = NULL;
        cdrom[i].ops         = NULL;
        cdrom[i].image       = NULL;