--- generator/hdr/generator.h	2020/03/04 04:47:02	1.1.1.4
+++ generator/hdr/generator.h	2020/03/04 04:47:14	1.1.1.5
@@ -13,23 +13,55 @@ void gen_reset(void);
 void gen_softreset(void);
 void gen_loadmemrom(const char *rom, int romlen);
 
+#if defined(linux)
+  #include <byteswap.h>
+  #define SWAP16(x) bswap_16((x))
+  #define SWAP32(x) bswap_32((x))
+#elif defined(__OpenBSD__)
+  #include <machine/endian.h>
+  #define SWAP16(x) bswap_16((x))
+  #define SWAP32(x) bswap_32((x))
+#else
+  #define SWAP16(y) (( ((y)>>8) & 0x00ff) | (( ((y)<<8) & 0xff00)))
+  #define SWAP32(y) (( ((y)>>24) & 0x000000ff) | \
+  		    (((y) >> 8)  & 0x0000ff00) | \
+  		    (((y) << 8)  & 0x00ff0000) | \
+          (((y) << 24) & 0xff000000) )
+  #warning "No native byte conversion"
+#endif
+
+/*
+ * LOCENDIANxx takes data that came from a big endian source and converts it
+ * into the local endian.  On a big endian machine the data will already be
+ * loaded correctly, however on a little endian machine the processor will
+ * have loaded the data assuming little endian data, so we need to swap the
+ * byte ordering.
+ *
+ * LOCENDIANxxL takes data that came from a little endian source and
+ * converts it into the local endian.  This means that on a little endian
+ * machine the data will already be loaded correctly, however on a big
+ * endian machine the processor will have loaded the data assuming big endian
+ * data, so we need to swap the byte ordering.
+ *
+ * Both LOCENDIANxx and LOCENDIANxxL can be used in reverse - i.e. when
+ * you have data in local endian that you need to write in big (LOCENDIANxx)
+ * or little (LOCENDIANxxL) endian.
+ *
+ */
+
 #ifdef WORDS_BIGENDIAN
 #define LOCENDIAN16(y) (y)
 #define LOCENDIAN32(y) (y)
+#define LOCENDIAN16L(y) SWAP16(y)
+#define LOCENDIAN32L(y) SWAP32(y)
+#define BYTES_HIGHFIRST 1
 #else
-#define LOCENDIAN16(y) ((((y)>>8)&0x00FF)+((((y)<<8)&0xFF00)))
-#define LOCENDIAN32(y) ( (((y)>>24) & 0x000000FF) + \
-			 (((y)>>8)  & 0x0000FF00) + \
-			 (((y)<<8)  & 0x00FF0000) + \
-			 (((y)<<24) & 0xFF000000) )
+#define LOCENDIAN16(y) SWAP16(y)
+#define LOCENDIAN32(y) SWAP32(y)
+#define LOCENDIAN16L(y) (y)
+#define LOCENDIAN32L(y) (y)
 #endif
 
-#define SWAP16(y) ((((y)>>8)&0x00FF)+((((y)<<8)&0xFF00)))
-#define SWAP32(y) ( (((y)>>24) & 0x000000FF) + \
-		    (((y)>>8)  & 0x0000FF00) + \
-		    (((y)<<8)  & 0x00FF0000) + \
-		    (((y)<<24) & 0xFF000000) )
-
 typedef enum {
   tp_src, tp_dst
 } t_type;
@@ -172,6 +204,10 @@ typedef struct {
 #define SR_SFLAG (1<<13)
 #define SR_TFLAG (1<<15)
 
+/* Steve Snake / Charles MacDonald (msgid <3C427237.3CEC@value.net>) -
+ * TAS on Genesis 1 and 2 (but not 3) do not write back with TAS */
+#define BROKEN_TAS
+
 #ifdef NOLOGGING
 #  define LOG_DEBUG3(x)   /* */
 #  define LOG_DEBUG2(x)   /* */
@@ -230,5 +266,6 @@ extern unsigned int gen_quit;
 extern unsigned int gen_debugmode;
 extern unsigned int gen_loglevel;
 extern unsigned int gen_autodetect;
+extern unsigned int gen_modifiedrom;
 extern t_musiclog gen_musiclog;
 extern char gen_leafname[];