SF7: Support Sega SF-7000 *.SF7 images

Author: keirf

src/image/image.c

@@ -15,6 +15,7 @@ extern const struct image_handler adf_image_handler;
 extern const struct image_handler atr_image_handler;
 extern const struct image_handler hfe_image_handler;
 extern const struct image_handler img_image_handler;
+extern const struct image_handler sf7_image_handler;
 extern const struct image_handler st_image_handler;
 extern const struct image_handler d81_image_handler;
 extern const struct image_handler dsk_image_handler;
@@ -45,6 +46,7 @@ const struct image_type image_type[] = {
     { "img", &img_image_handler },
     { "ima", &img_image_handler },
     { "out", &img_image_handler },
+    { "sf7", &sf7_image_handler },
     { "st",  &st_image_handler },
     { "adl", &adfs_image_handler },
     { "adm", &adfs_image_handler },

src/image/img.c

@@ -162,6 +162,9 @@ const static struct raw_type {
     { 8, _S(2), _IAM, 116, 1, 3, 1, 0, 0, 0, _C(80), _R(360) }, /* HD 360RPM */
     { 8, _S(2), _IAM, 57, 1, 2, 1, 0, 0, 0, _C(80), _R(360) }, /* DD 360RPM */
     { 0 }
+}, sf7_type[] = {
+    { 16, _S(1), _IAM, 42, 1, 1, 1, 0, 0, 0, _C(40), _R(300) }, /* 160kB */
+    { 0 }
 }, uknc_type[] = {
     { 10, _S(2), 0, 38, 1, 2, 1, 0, 0, 0, _C(80), _R(300) },
     { 0 }
@@ -723,6 +726,11 @@ static bool_t d81_open(struct image *im)
     return raw_type_open(im, d81_type);
 }
 
+static bool_t sf7_open(struct image *im)
+{
+    return raw_type_open(im, sf7_type);
+}
+
 static bool_t st_open(struct image *im)
 {
     const struct raw_type *in;
@@ -1512,6 +1520,14 @@ const struct image_handler d81_image_handler = {
     .write_track = raw_write_track,
 };
 
+const struct image_handler sf7_image_handler = {
+    .open = sf7_open,
+    .setup_track = raw_setup_track,
+    .read_track = raw_read_track,
+    .rdata_flux = bc_rdata_flux,
+    .write_track = raw_write_track,
+};
+
 const struct image_handler st_image_handler = {
     .open = st_open,
     .setup_track = raw_setup_track,