disk_error/73_DOS_MISMATCH disk_error/73_DOS_MISMATCH NUMBER 73 MESSAGE DOS MISMATCH DESCRIPTION DOS 1 and 2 are read compatible but not write compatible. Disks may be interchangeably read with either DOS, but a disk formatted on one version cannot be written upon with the other version because the format is different. This error is displayed whenever an attempt is made to write upon a disk which has been formatted in a non-compatible format. (A utility routine is available to assist in converting from one format to another.) This message may also appear after power up. NOTES Error number 73 in CBM DOS V2.6 1541.