document what is going on with mF8_sega

BizHawk.Emulation.Cores/Consoles/Atari/2600/Mappers/mF8_sega.cs

@@ -2,24 +2,14 @@
 
 namespace BizHawk.Emulation.Cores.Atari.Atari2600
 {
-	/*
-	F8 (Atari style 8K)
+    /*
+	F8 Sega
 	-----
 
-	This is the fairly standard way 8K of cartridge ROM was implemented.  There are two
-	4K ROM banks, which get mapped into the 4K of cartridge space.  Accessing 1FF8 or
-	1FF9 selects one of the two 4K banks.  When one of these two addresses are accessed,
-	the banks switch spontaniously.
-
-	ANY kind of access will trigger the switching- reading or writing.  Usually games use
-	LDA or BIT on 1FF8/1FF9 to perform the switch.
-
-	When the switch occurs, the entire 4K ROM bank switches, including the code that is
-	reading the 1FF8/1FF9 location.  Usually, games put a small stub of code in BOTH banks
-	so when the switch occurs, the code won't crash.
+	Apparently some of Sega's games have banks that are physically flipped, so even though this game uses a common mapper, the initial bank that gets pointed to is incorrect.
 	*/
 
-	internal class mF8_sega : MapperBase
+    internal class mF8_sega : MapperBase
 	{
 		private int _bank4K=1;