diff --git a/.gitattributes b/.gitattributes
index f188f03256e..f6990098091 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1930,6 +1930,8 @@ src/lib/formats/apollo_dsk.c svneol=native#text/plain
 src/lib/formats/apollo_dsk.h svneol=native#text/plain
 src/lib/formats/apridisk.c svneol=native#text/plain
 src/lib/formats/apridisk.h svneol=native#text/plain
+src/lib/formats/asst128_dsk.c svneol=native#text/plain
+src/lib/formats/asst128_dsk.h svneol=native#text/plain
 src/lib/formats/atari_dsk.c svneol=native#text/plain
 src/lib/formats/atari_dsk.h svneol=native#text/plain
 src/lib/formats/atarist_dsk.c svneol=native#text/plain
diff --git a/src/lib/formats/asst128_dsk.c b/src/lib/formats/asst128_dsk.c
new file mode 100644
index 00000000000..df0e03f0ba9
--- /dev/null
+++ b/src/lib/formats/asst128_dsk.c
@@ -0,0 +1,73 @@
+/***************************************************************************
+
+    Copyright Olivier Galibert
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are
+    met:
+
+        * Redistributions of source code must retain the above copyright
+          notice, this list of conditions and the following disclaimer.
+        * Redistributions in binary form must reproduce the above copyright
+          notice, this list of conditions and the following disclaimer in
+          the documentation and/or other materials provided with the
+          distribution.
+        * Neither the name 'MAME' nor the names of its contributors may be
+          used to endorse or promote products derived from this software
+          without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR
+    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT,
+    INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+    STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+    IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+    POSSIBILITY OF SUCH DAMAGE.
+
+****************************************************************************/
+
+/*********************************************************************
+
+    formats/asst128_dsk.c
+
+    asst128 format
+
+*********************************************************************/
+
+#include "emu.h"
+#include "formats/asst128_dsk.h"
+
+asst128_format::asst128_format() : upd765_format(formats)
+{
+}
+
+const char *asst128_format::name() const
+{
+	return "asst128";
+}
+
+const char *asst128_format::description() const
+{
+	return "ASST128 disk image";
+}
+
+const char *asst128_format::extensions() const
+{
+	return "img";
+}
+
+// Unverified gap sizes
+const asst128_format::format asst128_format::formats[] = {
+	{
+		floppy_image::FF_525, floppy_image::SSQD, floppy_image::MFM,
+		2000,  9, 80, 1, 512, {}, 1, {}, 80, 50, 22, 80
+	},
+	{}
+};
+
+const floppy_format_type FLOPPY_ASST128_FORMAT = &floppy_image_format_creator<asst128_format>;
diff --git a/src/lib/formats/asst128_dsk.h b/src/lib/formats/asst128_dsk.h
new file mode 100644
index 00000000000..4c030798c77
--- /dev/null
+++ b/src/lib/formats/asst128_dsk.h
@@ -0,0 +1,28 @@
+/*********************************************************************
+
+    formats/asst128_dsk.h
+
+    asst128 format
+
+*********************************************************************/
+
+#ifndef ASST128_DSK_H_
+#define ASST128_DSK_H_
+
+#include "upd765_dsk.h"
+
+class asst128_format : public upd765_format {
+public:
+	asst128_format();
+
+	virtual const char *name() const;
+	virtual const char *description() const;
+	virtual const char *extensions() const;
+
+private:
+	static const format formats[];
+};
+
+extern const floppy_format_type FLOPPY_ASST128_FORMAT;
+
+#endif
diff --git a/src/lib/lib.mak b/src/lib/lib.mak
index c59f03d72e9..d52a130b211 100644
--- a/src/lib/lib.mak
+++ b/src/lib/lib.mak
@@ -104,6 +104,7 @@ FORMATSOBJS = \
 	$(LIBOBJ)/formats/apridisk.o    \
 	$(LIBOBJ)/formats/apollo_dsk.o  \
 	$(LIBOBJ)/formats/ap_dsk35.o    \
+	$(LIBOBJ)/formats/asst128_dsk.o \
 	$(LIBOBJ)/formats/atari_dsk.o   \
 	$(LIBOBJ)/formats/atarist_dsk.o \
 	$(LIBOBJ)/formats/atom_tap.o    \
diff --git a/src/mess/drivers/pc.c b/src/mess/drivers/pc.c
index e2f08daa498..4470c0eb0a0 100644
--- a/src/mess/drivers/pc.c
+++ b/src/mess/drivers/pc.c
@@ -92,6 +92,7 @@ video HW too.
 #include "imagedev/cartslot.h"
 #include "formats/mfi_dsk.h"
 #include "formats/pc_dsk.h"
+#include "formats/asst128_dsk.h"
 
 #include "machine/am9517a.h"
 #include "sound/sn76496.h"
@@ -882,11 +883,19 @@ FLOPPY_FORMATS_MEMBER( pc_state::floppy_formats )
 	FLOPPY_PC_FORMAT
 FLOPPY_FORMATS_END
 
+FLOPPY_FORMATS_MEMBER( pc_state::asst128_formats )
+	FLOPPY_ASST128_FORMAT
+FLOPPY_FORMATS_END
+
 static SLOT_INTERFACE_START( ibmpc_floppies )
 		SLOT_INTERFACE( "525dd", FLOPPY_525_DD )
 		SLOT_INTERFACE( "35dd", FLOPPY_35_DD )
 SLOT_INTERFACE_END
 
+static SLOT_INTERFACE_START( asst128_floppies )
+		SLOT_INTERFACE( "525ssqd", FLOPPY_525_SSQD )
+SLOT_INTERFACE_END
+
 SLOT_INTERFACE_START(ibm5150_com)
 	SLOT_INTERFACE("microsoft_mouse", MSFT_SERIAL_MOUSE)
 	SLOT_INTERFACE("mouse_systems_mouse", MSYSTEM_SERIAL_MOUSE)
@@ -1522,6 +1531,18 @@ static MACHINE_CONFIG_DERIVED( asst128, iskr1031 )
 	MCFG_CPU_REPLACE("maincpu", I8086, 4772720)
 	MCFG_CPU_PROGRAM_MAP(iskr1031_map)
 	MCFG_CPU_IO_MAP(asst128_io)
+
+	MCFG_DEVICE_REMOVE("fdc:0");
+	MCFG_DEVICE_REMOVE("fdc:1");
+
+	MCFG_FLOPPY_DRIVE_ADD("fdc:0", asst128_floppies, "525ssqd", 0, pc_state::asst128_formats)
+	MCFG_FLOPPY_DRIVE_ADD("fdc:1", asst128_floppies, "525ssqd", 0, pc_state::asst128_formats)
+
+	MCFG_DEVICE_REMOVE(CGA_SCREEN_NAME)
+	MCFG_DEVICE_REMOVE(CGA_MC6845_NAME)
+
+	MCFG_FRAGMENT_ADD( pcvideo_mc1502 )
+	MCFG_GFXDECODE(ibmpcjr)
 MACHINE_CONFIG_END
 
 static MACHINE_CONFIG_START( iskr3104, pc_state )
@@ -2151,7 +2172,8 @@ ROM_START( asst128 )
 	ROM_LOAD( "asf400-f600.bin",   0xf4000, 0x2000, CRC(e3bf22de) SHA1(d4319edc82c0015ca0adc6c8771e887659717e62))
 	ROM_LOAD( "asfc00-ff00.bin",   0xfc000, 0x4000, CRC(0cb6401c) SHA1(70c4da47700f9925fd04049f16d54610c743ed8b))
 	ROM_REGION(0x2000,"gfx1", ROMREGION_ERASE00)
-	// Here CGA rom with cyrillic support should be added
+	ROM_COPY( "maincpu", 0xffa6e, 0x0800, 0x0400 )
+	ROM_COPY( "maincpu", 0xfc000, 0x0c00, 0x0400 )
 ROM_END
 
 ROM_START( mk88 )
diff --git a/src/mess/includes/pc.h b/src/mess/includes/pc.h
index 0ec37c4330e..b25b2ea4f37 100644
--- a/src/mess/includes/pc.h
+++ b/src/mess/includes/pc.h
@@ -150,6 +150,7 @@ public:
 	void pc_eop_w(int channel, bool state);
 	void mc1502_fdc_irq_drq(bool state);
 	DECLARE_FLOPPY_FORMATS( floppy_formats );
+	DECLARE_FLOPPY_FORMATS( asst128_formats );
 	IRQ_CALLBACK_MEMBER(pc_irq_callback);
 
 	DECLARE_DEVICE_IMAGE_LOAD_MEMBER( pcjr_cartridge );