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author Olivier Galibert <galibert@pobox.com>2012-01-07 21:03:04 +0000
committer Olivier Galibert <galibert@pobox.com>2012-01-07 21:03:04 +0000
commitf659a7f5ff3831730fa60c6d95e08a11a1f32814 (patch)
tree076827f20f5014283b4b20a9c21896c1f20bcd31 /src/lib/formats/dfi_dsk.c
parent517ae1369fbb4071e77a6f9efbf480134bcbbc6c (diff)
mess sync (nw)
Diffstat (limited to 'src/lib/formats/dfi_dsk.c')
-rw-r--r--src/lib/formats/dfi_dsk.c112
1 files changed, 112 insertions, 0 deletions
diff --git a/src/lib/formats/dfi_dsk.c b/src/lib/formats/dfi_dsk.c
index e69de29bb2d..47f1ca19d54 100644
--- a/src/lib/formats/dfi_dsk.c
+++ b/src/lib/formats/dfi_dsk.c
@@ -0,0 +1,112 @@
+#include "emu.h"
+#include "dfi_dsk.h"
+#include <zlib.h>
+
+dfi_format::dfi_format() : floppy_image_format_t()
+{
+}
+
+const char *dfi_format::name() const
+{
+ return "dfi";
+}
+
+const char *dfi_format::description() const
+{
+ return "Diskferret flux dump format";
+}
+
+const char *dfi_format::extensions() const
+{
+ return "dfi";
+}
+
+bool dfi_format::supports_save() const
+{
+ return true;
+}
+
+int dfi_format::identify(io_generic *io, UINT32 form_factor)
+{
+ char sign[4];
+ io_generic_read(io, sign, 0, 4);
+ return memcmp(sign, "DFE2", 4) ? 0 : 100;
+}
+
+bool dfi_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
+{
+ int size = io_generic_size(io);
+ int pos = 4;
+ UINT8 *data = 0;
+ int data_size = 0;
+
+ while(pos < size) {
+ UINT8 h[10];
+ io_generic_read(io, h, pos, 10);
+ UINT16 track = (h[0] << 8) | h[1];
+ UINT16 head = (h[2] << 8) | h[3];
+ // Ignore sector
+ UINT32 tsize = (h[6] << 24) | (h[7] << 16) | (h[8] << 8) | h[9];
+
+ if(pos+tsize+10 > size) {
+ if(data)
+ global_free(data);
+ return false;
+ }
+
+ if(tsize > data_size) {
+ if(data)
+ global_free(data);
+ data_size = tsize;
+ data = global_alloc_array(UINT8, data_size);
+ }
+
+ io_generic_read(io, data, pos+16, tsize);
+ pos += tsize+10;
+ tsize--; // Drop the extra 0x00 at the end
+
+ int index_time = 0;
+ int total_time = 0;
+ for(int i=0; i<tsize; i++) {
+ UINT8 v = data[i];
+ if((v & 0x7f) == 0x7f)
+ total_time += 0x7f;
+ else {
+ total_time += v & 0x7f;
+ if((v & 0x80) && !index_time)
+ index_time = total_time;
+ }
+ }
+
+ if(!index_time)
+ index_time = total_time;
+
+ image->set_track_size(track, head, tsize);
+
+ int cur_time = 0;
+ UINT32 mg = floppy_image::MG_A;
+ UINT32 *buf = image->get_buffer(track, head);
+ int tpos = 0;
+ buf[tpos++] = mg;
+ for(int i=0; i<tsize; i++) {
+ UINT8 v = data[i];
+ if((v & 0x7f) == 0x7f)
+ cur_time += 0x7f;
+ else {
+ cur_time += v & 0x7f;
+ if(v & 0x80)
+ break;
+ mg = mg == floppy_image::MG_A ? floppy_image::MG_B : floppy_image::MG_A;
+ buf[tpos++] = mg | UINT32(200000000ULL*cur_time/index_time);
+ }
+ }
+ image->set_track_size(track, head, tpos);
+ }
+
+ if(data)
+ global_free(data);
+
+ return true;
+}
+
+const floppy_format_type FLOPPY_DFI_FORMAT = &floppy_image_format_creator<dfi_format>;