char lntag; // Line tag
char * curfname; // Current filename
char tolowertab[128]; // Uppercase ==> lowercase
-char hextab[128]; // Table of hex values
+int8_t hextab[128]; // Table of hex values
char dotxtab[128]; // Table for ".b", ".s", etc.
char irbuf[LNSIZ]; // Text for .rept block line
char lnbuf[LNSIZ]; // Text of current line