$D55F/54623: Check for vaild track and sector numbers D55F: A5 80 LDA $80 D561: F0 EA BEQ $D54D D563: CD D7 FE CMP $FED7 D566: B0 E5 BCS $D54D D568: 20 4B F2 JSR $F24B D56B: C5 81 CMP $81 D56D: F0 DE BEQ $D54D D56F: 90 DC BCC $D54D D571: 60 RTS Previous Page / Next Page