diff --git a/src/Makefile.am b/src/Makefile.am
index 9b2795b..7d2b106 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -33,7 +33,7 @@ laserxt.c lpt.c lpt_dac.c lpt_dss.c mca.c mcr.c mem.c mem_bios.c mfm_at.c mfm_xe
 opti495.c paths.c pc.c pc87306.c pci.c pic.c piix.c pit.c ppi.c ps1.c ps2.c ps2_mca.c ps2_nvr.c nvr_tc8521.c rom.c rtc.c rtc_tc8521.c scat.c scsi.c scsi_53c400.c scsi_aha1540.c scsi_cd.c scsi_hd.c scsi_zip.c \
 serial.c sio.c sis496.c sl82c460.c sound.c sound_ad1848.c sound_adlib.c sound_adlibgold.c sound_audiopci.c sound_cms.c sound_emu8k.c sound_gus.c \
 sound_mpu401_uart.c sound_opl.c sound_pas16.c sound_ps1.c sound_pssj.c sound_sb.c sound_sb_dsp.c sound_sn76489.c \
-sound_speaker.c sound_ssi2001.c sound_wss.c sound_ym7128.c soundopenal.c tandy_eeprom.c tandy_rom.c \
+sound_speaker.c sound_ssi2001.c sound_wss.c sound_ym7128.c soundopenal.c sst39sf010.c tandy_eeprom.c tandy_rom.c \
 t1000.c t3100e.c \
 timer.c um8669f.c um8881f.c vid_ati_eeprom.c vid_ati_mach64.c vid_ati18800.c vid_ati28800.c \
 vid_ati68860_ramdac.c vid_cga.c vid_cl5429.c vid_colorplus.c vid_compaq_cga.c vid_ega.c vid_et4000.c vid_et4000w32.c vid_genius.c vid_hercules.c \
diff --git a/src/Makefile.mingw-wx-sdl2 b/src/Makefile.mingw-wx-sdl2
index 435aaf5..8414549 100644
--- a/src/Makefile.mingw-wx-sdl2
+++ b/src/Makefile.mingw-wx-sdl2
@@ -29,7 +29,7 @@ OBJ = 386.o 386_common.o 386_dynarec.o 386_dynarec_ops.o 808x.o acc2036.o acer38
 	sound.o sound_ad1848.o sound_adlib.o sound_adlibgold.o sound_audiopci.o sound_cms.o sound_dbopl.o \
 	sound_emu8k.o sound_gus.o sound_mpu401_uart.o sound_opl.o sound_pas16.o sound_ps1.o sound_pssj.o \
 	sound_resid.o sound_sb.o sound_sb_dsp.o sound_sn76489.o sound_speaker.o sound_ssi2001.o sound_wss.o \
-	sound_ym7128.o soundopenal.o t1000.o t3100e.o tandy_eeprom.o tandy_rom.o timer.o um8881f.o um8669f.o \
+	sound_ym7128.o soundopenal.o sst39sf010.o t1000.o t3100e.o tandy_eeprom.o tandy_rom.o timer.o um8881f.o um8669f.o \
 	vid_ati_eeprom.o vid_ati_mach64.o vid_ati18800.o vid_ati28800.o vid_ati68860_ramdac.o vid_cga.o \
 	vid_cl5429.o vid_colorplus.o vid_compaq_cga.o vid_ega.o vid_et4000.o vid_et4000w32.o \
 	vid_et4000w32i.o vid_genius.o vid_hercules.o vid_icd2061.o vid_ics2595.o vid_incolor.o vid_mda.o \
diff --git a/src/model.c b/src/model.c
index d060d67..bed454f 100644
--- a/src/model.c
+++ b/src/model.c
@@ -56,6 +56,7 @@
 #include "sound_ps1.h"
 #include "sound_pssj.h"
 #include "sound_sn76489.h"
+#include "sst39sf010.h"
 #include "tandy_eeprom.h"
 #include "tandy_rom.h"
 #include "um8669f.h"
@@ -675,6 +676,7 @@ void at_mvp3_init()
         mvp3_init();
         vt82c586b_init(7, 8, 9, 10, 0);
         w83877tf_init();
+        device_add(&sst_39sf010_device);
 }
 
 void model_init()
diff --git a/src/sst39sf010.c b/src/sst39sf010.c
new file mode 100644
index 0000000..57969b4
--- /dev/null
+++ b/src/sst39sf010.c
@@ -0,0 +1,218 @@
+#include <stdlib.h>
+#include "ibm.h"
+#include "device.h"
+#include "mem.h"
+#include "sst39sf010.h"
+
+typedef struct sst_t
+{
+        int command_state;
+        int id_mode;
+        int erase;
+        int dirty;
+        
+        char flash_path[1024];
+} sst_t;
+
+#define SST_CHIP_ERASE    0x10
+#define SST_SECTOR_ERASE  0x30
+#define SST_ERASE         0x80
+#define SST_SET_ID_MODE   0x90
+#define SST_BYTE_PROGRAM  0xa0
+#define SST_CLEAR_ID_MODE 0xf0
+
+static void set_id_mode(sst_t *sst);
+static void clear_id_mode(sst_t *sst);
+
+static void sst_new_command(sst_t *sst, uint8_t val)
+{
+        switch (val)
+        {
+                case SST_CHIP_ERASE:
+                if (sst->erase)
+                        memset(rom, 0xff, 0x20000);
+                sst->command_state = 0;
+                sst->erase = 0;
+                break;
+                
+                case SST_ERASE:
+                sst->command_state = 0;
+                sst->erase = 1;
+                break;
+                
+                case SST_SET_ID_MODE:
+                if (!sst->id_mode)
+                        set_id_mode(sst);
+                sst->command_state = 0;
+                sst->erase = 0;
+                break;
+                
+                case SST_BYTE_PROGRAM:
+                sst->command_state = 3;
+                sst->erase = 0;
+                break;
+
+                case SST_CLEAR_ID_MODE:
+                if (sst->id_mode)
+                        clear_id_mode(sst);
+                sst->command_state = 0;
+                sst->erase = 0;
+                break;
+
+                default:
+                sst->command_state = 0;
+                sst->erase = 0;
+        }
+}
+
+static void sst_sector_erase(sst_t *sst, uint32_t addr)
+{
+//        pclog("SST sector erase %08x\n", addr);
+        memset(&rom[addr & 0x1f000], 0xff, 4096);
+        sst->dirty = 1;
+}
+
+static uint8_t sst_read_id(uint32_t addr, void *p)
+{
+        if ((addr & 0xffff) == 0)
+                return 0xbf; /*SST*/
+        else if ((addr & 0xffff) == 1)
+                return 0xb5; /*39SF010*/
+        else
+                return 0xff;
+//                fatal("sst_read_id: addr=%08x\n", addr);
+}
+
+static void sst_write(uint32_t addr, uint8_t val, void *p)
+{
+        sst_t *sst = (sst_t *)p;
+
+//        pclog("sst_write: addr=%08x val=%02x state=%i\n", addr, val, sst->command_state);
+        switch (sst->command_state)
+        {
+                case 0:
+                if (val == 0xf0)
+                {
+                        if (sst->id_mode)
+                                clear_id_mode(sst);
+                }
+                else if ((addr & 0xffff) == 0x5555 && val == 0xaa)
+                        sst->command_state = 1;
+                else
+                        sst->command_state = 0;
+                break;
+                case 1:
+                if ((addr & 0xffff) == 0x2aaa && val == 0x55)
+                        sst->command_state = 2;
+                else
+                        sst->command_state = 0;
+                break;
+                case 2:
+                if ((addr & 0xffff) == 0x5555)
+                        sst_new_command(sst, val);
+                else if (val == SST_SECTOR_ERASE && sst->erase)
+                {
+                        sst_sector_erase(sst, addr);
+                        sst->command_state = 0;
+                }
+                else
+                        sst->command_state = 0;
+                break;
+                case 3:
+//                pclog("Byte program %08x %02x\n", addr, val);
+                rom[addr & 0x1ffff] = val;
+                sst->command_state = 0;
+                sst->dirty = 1;
+                break;
+        }
+}
+
+static void set_id_mode(sst_t *sst)
+{
+        int c;
+
+	for (c = 0; c < 8; c++)
+	{
+                mem_mapping_set_handler(&bios_mapping[c],
+                                        sst_read_id, NULL, NULL,
+                                        sst_write, NULL, NULL);
+                mem_mapping_set_p(&bios_mapping[c], sst);
+                mem_mapping_set_handler(&bios_high_mapping[c],
+                                        sst_read_id, NULL, NULL,
+                                        sst_write, NULL, NULL);
+                mem_mapping_set_p(&bios_high_mapping[c], sst);
+	}
+	sst->id_mode = 1;
+}
+
+static void clear_id_mode(sst_t *sst)
+{
+        int c;
+
+	for (c = 0; c < 8; c++)
+	{
+                mem_mapping_set_handler(&bios_mapping[c],
+                                        mem_read_bios, mem_read_biosw, mem_read_biosl,
+                                        sst_write, NULL, NULL);
+                mem_mapping_set_p(&bios_mapping[c], sst);
+                mem_mapping_set_handler(&bios_high_mapping[c],
+                                        mem_read_bios, mem_read_biosw, mem_read_biosl,
+                                        sst_write, NULL, NULL);
+                mem_mapping_set_p(&bios_high_mapping[c], sst);
+	}
+	sst->id_mode = 0;
+}
+
+static void *sst_39sf010_init()
+{
+        FILE *f;
+        sst_t *sst = malloc(sizeof(sst_t));
+        memset(sst, 0, sizeof(sst_t));
+
+	switch(romset)
+	{
+		case ROM_FIC_VA503P:
+		strcpy(sst->flash_path, "fic_va503p/");
+		break;
+		default:
+                fatal("sst_39sf010_init on unsupported ROM set %i\n", romset);
+	}
+	strcat(sst->flash_path, "flash.bin");
+        f = romfopen(sst->flash_path, "rb");
+        if (f)
+        {
+                fread(rom, 0x20000, 1, f);
+                fclose(f);
+        }
+
+        clear_id_mode(sst);
+	
+	return sst;
+}
+
+static void sst_39sf010_close(void *p)
+{
+        sst_t *sst = (sst_t *)p;
+        
+        if (sst->dirty)
+        {
+                FILE *f = romfopen(sst->flash_path, "wb");
+                fwrite(rom, 0x20000, 1, f);
+                fclose(f);
+        }
+
+        free(sst);
+}
+
+device_t sst_39sf010_device =
+{
+        "SST 39SF010 Flash BIOS",
+        0,
+        sst_39sf010_init,
+        sst_39sf010_close,
+        NULL,
+        NULL,
+        NULL,
+        NULL,
+        NULL
+};
diff --git a/src/sst39sf010.h b/src/sst39sf010.h
new file mode 100644
index 0000000..97d4a63
--- /dev/null
+++ b/src/sst39sf010.h
@@ -0,0 +1 @@
+extern device_t sst_39sf010_device;