diskdefs: Add format definitions for Xerox 860

Author: matmat

src/greaseweazle/data/diskdefs.cfg

@@ -72,4 +72,5 @@ import sci. "diskdefs_sci.cfg"
 import sega. "diskdefs_sega.cfg"
 import thomson. "diskdefs_thomson.cfg"
 import tsc. "diskdefs_tsc.cfg"
+import xerox. "diskdefs_xerox.cfg"
 import zx. "diskdefs_zx.cfg"

src/greaseweazle/data/diskdefs_xerox.cfg

@@ -0,0 +1,59 @@
+# prefix: xerox.
+
+# Xerox 860, 8-inch SS/SD
+disk 860.ss
+    cyls = 77
+    heads = 1
+    tracks 0 ibm.fm
+        secs = 26
+        bps = 128
+        interleave = 1
+        rate = 250
+        rpm = 360
+    end
+    tracks * ibm.fm
+        secs = 8
+        bps = 512
+        interleave = 2
+        rate = 250
+        rpm = 360
+    end
+end
+
+# Xerox 860, 8-inch DS/SD
+disk 860.dssd
+    cyls = 77
+    heads = 2
+    tracks 0.0 ibm.fm
+        secs = 26
+        bps = 128
+        interleave = 2
+        h = 0
+        rate = 250
+        rpm = 360
+    end
+    tracks 0.1 ibm.fm
+        secs = 26
+        bps = 128
+	interleave = 2
+        h = 0
+        rate = 250
+        rpm = 360
+    end
+    tracks 1-76.0 ibm.fm
+        secs = 8
+        bps = 512
+	interleave = 4
+        h = 0
+        rate = 250
+        rpm = 360
+    end
+    tracks 1-76.1 ibm.fm
+        secs = 8
+        bps = 512
+	interleave = 4
+        h = 0
+        rate = 250
+        rpm = 360
+    end
+end