(MESS) victor9k: Added writing to sector dump disk images. [Curt Coder]

src/lib/formats/flopimg.c

@@ -2890,3 +2890,68 @@ void floppy_image_format_t::extract_sectors_from_bitstream_gcr5(const UINT8 *bit
 		}
 	}
 }
+
+void floppy_image_format_t::extract_sectors_from_bitstream_victor_gcr5(const UINT8 *bitstream, int track_size, desc_xs *sectors, UINT8 *sectdata, int sectdata_size)
+{
+	memset(sectors, 0, 256*sizeof(desc_xs));
+
+	// Don't bother if it's just too small
+	if(track_size < 100)
+		return;
+
+	// Start by detecting all id and data blocks
+	int hblk[100], dblk[100];
+	int hblk_count = 0, dblk_count = 0;
+
+	// Precharge the shift register to detect over-the-index stuff
+	UINT16 shift_reg = 0;
+	for(int i=0; i<16; i++)
+		if(sbit_r(bitstream, track_size-16+i))
+			shift_reg |= 0x8000 >> i;
+
+	// Scan the bitstream for sync marks and follow them to check for blocks
+	bool sync = false;
+	for(int i=0; i<track_size; i++) {
+		int bit = sbit_r(bitstream, i);
+		shift_reg = ((shift_reg << 1) | bit) & 0x3ff;
+		
+		if (sync && !bit) {
+			UINT8 id = sbyte_gcr5_r(bitstream, i, track_size);
+
+			switch (id) {
+			case 0x07:
+				if(hblk_count < 100)
+					hblk[hblk_count++] = i-10;
+				break;
+			
+			case 0x08:
+				if(dblk_count < 100)
+					dblk[dblk_count++] = i-10;
+				break;
+			}
+		}
+
+		sync = (shift_reg == 0x3ff);
+	}
+
+	// Then extract the sectors
+	int sectdata_pos = 0;
+	for(int i=0; i<hblk_count; i++) {
+		int pos = hblk[i];
+		ATTR_UNUSED UINT8 block_id = sbyte_gcr5_r(bitstream, pos, track_size);
+		UINT8 track = sbyte_gcr5_r(bitstream, pos, track_size);
+		UINT8 sector = sbyte_gcr5_r(bitstream, pos, track_size);
+
+		pos = dblk[i];
+		block_id = sbyte_gcr5_r(bitstream, pos, track_size);
+
+		sectors[sector].track = track & 0x7f;
+		sectors[sector].head = BIT(track, 7);
+		sectors[sector].size = 512;
+		sectors[sector].data = sectdata + sectdata_pos;
+		for(int j=0; j<sectors[sector].size; j++) {
+			UINT8 data = sbyte_gcr5_r(bitstream, pos, track_size);
+			sectdata[sectdata_pos++] = data;
+		}
+	}
+}

src/lib/formats/flopimg.h

@@ -522,6 +522,8 @@ protected:
 	void extract_sectors_from_bitstream_fm_pc(const UINT8 *bitstream, int track_size, desc_xs *sectors, UINT8 *sectdata, int sectdata_size);
 	//! Commodore type sectors with GCR5 encoding
 	void extract_sectors_from_bitstream_gcr5(const UINT8 *bitstream, int track_size, desc_xs *sectors, UINT8 *sectdata, int sectdata_size, int head, int tracks);
+	//! Victor 9000 type sectors with GCR5 encoding
+	void extract_sectors_from_bitstream_victor_gcr5(const UINT8 *bitstream, int track_size, desc_xs *sectors, UINT8 *sectdata, int sectdata_size);
 
 
 	//! @brief Get a geometry (including sectors) from an image.

src/lib/formats/victor9k_dsk.c

@@ -298,16 +298,30 @@ bool victor9k_format::load(io_generic *io, UINT32 form_factor, floppy_image *ima
 	return true;
 }
 
-bool victor9k_format::supports_save() const
-{
-	return false;
-}
-
 int victor9k_format::get_rpm(int head, int track)
 {
 	return rpm[speed_zone[head][track]];
 }
 
+int victor9k_format::get_image_offset(const format &f, int _head, int _track)
+{
+	int offset = 0;
+	if (_head) {
+		for (int track = 0; track < f.track_count; track++) {
+			offset += compute_track_size(f, _head, track);
+		}
+	}
+	for (int track = 0; track < _track; track++) {
+		offset += compute_track_size(f, _head, track);
+	}
+	return offset;
+}
+
+int victor9k_format::compute_track_size(const format &f, int head, int track)
+{
+	return sectors_per_track[head][track] * f.sector_base_size;
+}
+
 const victor9k_format::format victor9k_format::formats[] = {
 	{ //
 		floppy_image::FF_525, floppy_image::SSDD, 1224, 80, 1, 512
@@ -376,4 +390,49 @@ const int victor9k_format::rpm[9] =
 	252, 267, 283, 300, 320, 342, 368, 401, 417
 };
 
+bool victor9k_format::save(io_generic *io, floppy_image *image)
+{
+	const format &f = formats[0];
+
+	for(int head=0; head < f.head_count; head++) {
+		for(int track=0; track < f.track_count; track++) {
+			int sector_count = sectors_per_track[head][track];
+			int track_size = compute_track_size(f, head, track);
+			UINT8 sectdata[40*512];
+			desc_s sectors[40];
+			int offset = get_image_offset(f, head, track);
+
+			build_sector_description(f, sectdata, 0, sectors, sector_count);
+			extract_sectors(image, f, sectors, track, head, sector_count);
+			io_generic_write(io, sectdata, offset, track_size);
+		}
+	}
+
+	return true;
+}
+
+void victor9k_format::extract_sectors(floppy_image *image, const format &f, desc_s *sdesc, int track, int head, int sector_count)
+{
+	UINT8 bitstream[500000/8];
+	UINT8 sectdata[50000];
+	desc_xs sectors[256];
+	int track_size;
+
+	// Extract the sectors
+	generate_bitstream_from_track(track, head, cell_size[speed_zone[head][track]], bitstream, track_size, image);
+	extract_sectors_from_bitstream_victor_gcr5(bitstream, track_size, sectors, sectdata, sizeof(sectdata));
+
+	for(int i=0; i<sector_count; i++) {
+		desc_s &ds = sdesc[i];
+		desc_xs &xs = sectors[ds.sector_id];
+		if(!xs.data)
+			memset((void *)ds.data, 0, ds.size);
+		else if(xs.size < ds.size) {
+			memcpy((void *)ds.data, xs.data, xs.size);
+			memset((UINT8 *)ds.data + xs.size, 0, xs.size - ds.size);
+		} else
+			memcpy((void *)ds.data, xs.data, ds.size);
+	}
+}
+
 const floppy_format_type FLOPPY_VICTOR_9000_FORMAT = &floppy_image_format_creator<victor9k_format>;

src/lib/formats/victor9k_dsk.h

@@ -31,13 +31,10 @@ public:
 	virtual const char *description() const;
 	virtual const char *extensions() const;
 
-	int find_size(io_generic *io, UINT32 form_factor);
 	virtual int identify(io_generic *io, UINT32 form_factor);
-	void log_boot_sector(UINT8 *data);
-	floppy_image_format_t::desc_e* get_sector_desc(const format &f, int &current_size, int sector_count);
-	void build_sector_description(const format &f, UINT8 *sectdata, UINT32 sect_offs, desc_s *sectors, int sector_count) const;
 	virtual bool load(io_generic *io, UINT32 form_factor, floppy_image *image);
-	virtual bool supports_save() const;
+	virtual bool save(io_generic *io, floppy_image *image);
+	virtual bool supports_save() const { return true; }
 
 	static int get_rpm(int head, int track);
 
@@ -48,6 +45,14 @@ protected:
 	static const int sectors_per_track[2][80];
 	static const int speed_zone[2][80];
 	static const int rpm[9];
+
+	int find_size(io_generic *io, UINT32 form_factor);
+	void log_boot_sector(UINT8 *data);
+	floppy_image_format_t::desc_e* get_sector_desc(const format &f, int &current_size, int sector_count);
+	void build_sector_description(const format &f, UINT8 *sectdata, UINT32 sect_offs, desc_s *sectors, int sector_count) const;
+	int get_image_offset(const format &f, int head, int track);
+	int compute_track_size(const format &f, int head, int track);
+	void extract_sectors(floppy_image *image, const format &f, desc_s *sdesc, int track, int head, int sector_count);
 };
 
 extern const floppy_format_type FLOPPY_VICTOR_9000_FORMAT;