//#define D_rlong(lw) {*chptr++=(char)(lw>>16);*chptr++=(char)(lw>>24);\
// *chptr++=(char)lw;*chptr++=(char)(lw>>8); \
// sloc+=4; ch_size += 4;if(orgactive) orgaddr += 4;}
+// Fill n bytes with zeroes
+#define D_ZEROFILL(n) {memset(chptr, 0, n); chptr+=n; sloc+=n; ch_size+=n;\
+ if (orgactive) orgaddr+=n;}
#define NSECTS 16 // Max. number of sections