5 PRINT"[147]":POKE53280,14:POKE53281,6:POKE646,14
100 DN=8:CLOSE 1:OPEN 1,DN,15,"U9":INPUT#1,EN,EM$,ET,ES
110 IF RIGHT$(EM$,2)<>"71" THEN PRINT:PRINT "NOT A 1571 DRIVE":CLOSE 1:END
120 PRINT#1,"M-R"CHR$(0)CHR$(128)CHR$(2):GET#1,A$,B$:CLOSE 1
130 A=ASC(A$+CHR$(0)):B=ASC(B$+CHR$(0)):R$="UNKNOWN"
140 IF A=157 THEN IF B=30 THEN R$="-01"
150 IF A=146 THEN IF B=37 THEN R$="-03"
160 IF A=242 THEN IF B=104 THEN R$="-05"
170 PRINT "1571 DOS ROM REVISION IS ";R$