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-rw-r--r--src/lib/formats/oric_dsk.cpp111
1 files changed, 111 insertions, 0 deletions
diff --git a/src/lib/formats/oric_dsk.cpp b/src/lib/formats/oric_dsk.cpp
new file mode 100644
index 00000000000..5d3071e77c1
--- /dev/null
+++ b/src/lib/formats/oric_dsk.cpp
@@ -0,0 +1,111 @@
+// license:BSD-3-Clause
+// copyright-holders:Olivier Galibert
+/*********************************************************************
+
+ formats/oric_dsk.c
+
+ Oric disk images
+
+*********************************************************************/
+
+#include "emu.h" // logerror
+#include "formats/oric_dsk.h"
+
+oric_dsk_format::oric_dsk_format()
+{
+}
+
+const char *oric_dsk_format::name() const
+{
+ return "oric_dsk";
+}
+
+const char *oric_dsk_format::description() const
+{
+ return "Oric disk image";
+}
+
+const char *oric_dsk_format::extensions() const
+{
+ return "dsk";
+}
+
+bool oric_dsk_format::supports_save() const
+{
+ return true;
+}
+
+int oric_dsk_format::identify(io_generic *io, UINT32 form_factor)
+{
+ UINT8 h[256];
+ io_generic_read(io, h, 0, 256);
+
+ if(memcmp(h, "MFM_DISK", 8))
+ return 0;
+
+ int sides = (h[11] << 24) | (h[10] << 16) | (h[ 9] << 8) | h[ 8];
+ int tracks = (h[15] << 24) | (h[14] << 16) | (h[13] << 8) | h[12];
+ int geom = (h[19] << 24) | (h[18] << 16) | (h[17] << 8) | h[16];
+
+ int size = io_generic_size(io);
+ if(sides < 0 || sides > 2 || geom != 1 || size != 256+6400*sides*tracks)
+ return 0;
+
+ return 100;
+}
+
+bool oric_dsk_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
+{
+ UINT8 h[256];
+ UINT8 t[6250+3];
+
+ t[6250] = t[6251] = t[6252] = 0;
+ io_generic_read(io, h, 0, 256);
+
+ int sides = (h[11] << 24) | (h[10] << 16) | (h[ 9] << 8) | h[ 8];
+ int tracks = (h[15] << 24) | (h[14] << 16) | (h[13] << 8) | h[12];
+
+ for(int side=0; side<sides; side++)
+ for(int track=0; track<tracks; track++) {
+ io_generic_read(io, t, 256+6400*(tracks*side + track), 6250);
+ std::vector<UINT32> stream;
+ int sector_size = 128;
+ for(int i=0; i<6250; i++) {
+ if(t[i] == 0xc2 && t[i+1] == 0xc2 && t[i+2] == 0xc2) {
+ raw_w(stream, 16, 0x5224);
+ raw_w(stream, 16, 0x5224);
+ raw_w(stream, 16, 0x5224);
+ i += 2;
+ continue;
+ }
+ if(t[i] == 0xa1 && t[i+1] == 0xa1 && t[i+2] == 0xa1) {
+ raw_w(stream, 16, 0x4489);
+ raw_w(stream, 16, 0x4489);
+ raw_w(stream, 16, 0x4489);
+ int copy;
+ if(t[i+3] == 0xfe) {
+ copy = 7;
+ sector_size = 128 << (t[i+7] & 3);
+ } else if(t[i+3] == 0xfb)
+ copy = sector_size+3;
+ else
+ copy = 0;
+ for(int j=0; j<copy; j++)
+ mfm_w(stream, 8, t[i+3+j]);
+ i += 2+copy;
+ continue;
+ }
+ mfm_w(stream, 8, t[i]);
+ }
+ generate_track_from_levels(track, side, stream, 0, image);
+ }
+
+ return true;
+}
+
+bool oric_dsk_format::save(io_generic *io, floppy_image *image)
+{
+ return true;
+}
+
+const floppy_format_type FLOPPY_ORIC_DSK_FORMAT = &floppy_image_format_creator<oric_dsk_format>;