pc98: Add its specific almost raw fdi disk format [O. Galibert]

src/lib/formats/pc98fdi_dsk.c

@@ -0,0 +1,128 @@
+/***************************************************************************
+
+    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/pc98fdi_dsk.h
+
+    PC98FDI disk images
+
+*********************************************************************/
+
+#include "emu.h"
+#include "pc98fdi_dsk.h"
+
+pc98fdi_format::pc98fdi_format()
+{
+}
+
+const char *pc98fdi_format::name() const
+{
+	return "pc98-fdi";
+}
+
+const char *pc98fdi_format::description() const
+{
+	return "PC98 FDI disk image";
+}
+
+const char *pc98fdi_format::extensions() const
+{
+	return "fdi";
+}
+
+int pc98fdi_format::identify(io_generic *io, UINT32 form_factor)
+{
+	int size = io_generic_size(io);
+	UINT8 h[32];
+
+	io_generic_read(io, h, 0, 32);
+	int hsize = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x8));
+	int psize = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0xc));
+	int ssize = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x10));
+	int scnt  = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x14));
+	int sides = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x18));
+	int ntrk  = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x1c));
+	if(size == hsize + psize && psize == ssize*scnt*sides*ntrk)
+		return 100;
+
+	return 0;
+}
+
+bool pc98fdi_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
+{
+	UINT8 h[32];
+
+	io_generic_read(io, h, 0, 32);
+
+	int hsize         = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x8));
+	int sector_size   = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x10));
+	int sector_count  = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x14));
+	int head_count    = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x18));
+	int track_count   = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x1c));
+
+	int cell_count = form_factor == floppy_image::FF_35 ? 200000 : 166666;
+
+	int ssize;
+	for(ssize=0; (128 << ssize) < sector_size; ssize++);
+
+	desc_pc_sector sects[256];
+	UINT8 sect_data[65536];
+
+	for(int track=0; track < track_count; track++)
+		for(int head=0; head < head_count; head++) {
+			io_generic_read(io, sect_data, hsize + sector_size*sector_count*(track*head_count + head), sector_size*sector_count);
+
+			for(int i=0; i<sector_count; i++) {
+				sects[i].track       = track;
+				sects[i].head        = head;
+				sects[i].sector      = i+1;
+				sects[i].size        = ssize;
+				sects[i].actual_size = sector_size;
+				sects[i].deleted     = false;
+				sects[i].bad_crc     = false;
+				sects[i].data        = sect_data + i*sector_size;
+			}
+
+			build_pc_track_mfm(track, head, image, cell_count, sector_count, sects, calc_default_pc_gap3_size(form_factor, sector_size));
+		}
+
+	return true;
+}
+
+bool pc98fdi_format::supports_save() const
+{
+	return false;
+}
+
+const floppy_format_type FLOPPY_PC98FDI_FORMAT = &floppy_image_format_creator<pc98fdi_format>;

src/lib/formats/pc98fdi_dsk.h

@@ -0,0 +1,31 @@
+/*********************************************************************
+
+    formats/pc98fdi_dsk.h
+
+    PC98FDI disk images
+
+*********************************************************************/
+
+#ifndef PC98FDI_DSK_H
+#define PC98FDI_DSK_H
+
+#include "flopimg.h"
+
+
+class pc98fdi_format : public floppy_image_format_t
+{
+public:
+	pc98fdi_format();
+
+	virtual int identify(io_generic *io, UINT32 form_factor);
+	virtual bool load(io_generic *io, UINT32 form_factor, floppy_image *image);
+
+	virtual const char *name() const;
+	virtual const char *description() const;
+	virtual const char *extensions() const;
+	virtual bool supports_save() const;
+};
+
+extern const floppy_format_type FLOPPY_PC98FDI_FORMAT;
+
+#endif /* PC98FDI_DSK_H */

src/lib/lib.mak

@@ -153,6 +153,7 @@ FORMATSOBJS = \
 	$(LIBOBJ)/formats/p6001_cas.o	\
 	$(LIBOBJ)/formats/pasti_dsk.o	\
 	$(LIBOBJ)/formats/pc_dsk.o		\
+	$(LIBOBJ)/formats/pc98fdi_dsk.o	\
 	$(LIBOBJ)/formats/pmd_cas.o		\
 	$(LIBOBJ)/formats/primoptp.o	\
 	$(LIBOBJ)/formats/pyldin_dsk.o	\

src/mess/drivers/pc9801.c

@@ -271,6 +271,7 @@
 #include "machine/ram.h"
 #include "formats/mfi_dsk.h"
 #include "formats/d88_dsk.h"
+#include "formats/pc98fdi_dsk.h"
 
 #define UPD1990A_TAG "upd1990a"
 #define UPD8251_TAG  "upd8251"
@@ -470,6 +471,8 @@ public:
 	DECLARE_WRITE8_MEMBER(pc9821_window_bank_w);
 	DECLARE_READ32_MEMBER(pc9821_timestamp_r);
 
+	DECLARE_FLOPPY_FORMATS( floppy_formats );
+
 	void fdc_2hd_irq(bool state);
 	void fdc_2hd_drq(bool state);
 	void fdc_2dd_irq(bool state);
@@ -3089,6 +3092,10 @@ static const ym2203_interface pc98_ym2203_intf =
 	DEVCB_LINE(pc9801_sound_irq)
 };
 
+FLOPPY_FORMATS_MEMBER( pc9801_state::floppy_formats )
+	FLOPPY_PC98FDI_FORMAT
+FLOPPY_FORMATS_END
+
 static MACHINE_CONFIG_START( pc9801, pc9801_state )
 	MCFG_CPU_ADD("maincpu", I8086, 5000000) //unknown clock
 	MCFG_CPU_PROGRAM_MAP(pc9801_map)
@@ -3111,10 +3118,10 @@ static MACHINE_CONFIG_START( pc9801, pc9801_state )
 
 	MCFG_UPD765A_ADD("upd765_2hd", false, true)
 	MCFG_UPD765A_ADD("upd765_2dd", false, true)
-	MCFG_FLOPPY_DRIVE_ADD("upd765_2hd:0", pc9801_floppies, "525hd", 0, floppy_image_device::default_floppy_formats)
-	MCFG_FLOPPY_DRIVE_ADD("upd765_2hd:1", pc9801_floppies, "525hd", 0, floppy_image_device::default_floppy_formats)
-	MCFG_FLOPPY_DRIVE_ADD("upd765_2dd:0", pc9801_floppies, "525hd", 0, floppy_image_device::default_floppy_formats)
-	MCFG_FLOPPY_DRIVE_ADD("upd765_2dd:1", pc9801_floppies, "525hd", 0, floppy_image_device::default_floppy_formats)
+	MCFG_FLOPPY_DRIVE_ADD("upd765_2hd:0", pc9801_floppies, "525hd", 0, pc9801_state::floppy_formats)
+	MCFG_FLOPPY_DRIVE_ADD("upd765_2hd:1", pc9801_floppies, "525hd", 0, pc9801_state::floppy_formats)
+	MCFG_FLOPPY_DRIVE_ADD("upd765_2dd:0", pc9801_floppies, "525hd", 0, pc9801_state::floppy_formats)
+	MCFG_FLOPPY_DRIVE_ADD("upd765_2dd:1", pc9801_floppies, "525hd", 0, pc9801_state::floppy_formats)
 
 	MCFG_SOFTWARE_LIST_ADD("disk_list","pc98")