rom $F225:

F22A: A6 B9     <A HREF="BLDX.HTM">LDX</A> <A HREF="ZPB9.HTM">$B9</A>       ; Current File - Secondary Address
F22C: E0 60     <A HREF="BCPX.HTM">CPX</A> #$60
F22E: F0 03     <A HREF="BBEQ.HTM">BEQ</A> $F233
F230: 4C 0A F7  <A HREF="BJMP.HTM">JMP</A> <A HREF="ROMF70A.HTM">$F70A</A>     ; Output I/O Error Messages: 'NOT INPUT FILE'

Jump from $F21B, $F21F, $F22E, $F24B:

F233: 85 99     <A HREF="BSTA.HTM">STA</A> <A HREF="ZP99.HTM">$99</A>       ; Default Input Device (0)
F235: 18        <A HREF=