Timer counters now 64-bit;

Cleaned up floppy code a lot and reverted to single poller;
Fixed segment present bit and limit checking at read/write within segment;
The ASUS boards now have memregs too;
RTC code improved based on suggestion by Sarah Walker;
Fixed SVGA odd/even emulation and added chain odd/even support;
Removed non-existent CPU's.

src/vid_pc1640.c

@@ -23,7 +23,8 @@ typedef struct pc1640_t
         rom_t bios_rom;
         
         int cga_enabled;
-        int dispontime, dispofftime, vidtime;
+        int dispontime, dispofftime;
+	int64_t vidtime;
 } pc1640_t;
 
 void pc1640_out(uint16_t addr, uint8_t val, void *p)