All IDEbiosses 1.9x only support 24 bit sector numbers: this means maximum 8 GB harddisks. You can also use bigger harddisks, but only the first 8 GB can be accessed. IDE harddisks can use maximum 28 bit sector numbers (=128 GB) and this will be supported by IDE bios 3.xx in future. This requires some changes to IDE system variables and that means that also IDE software that makes use of these system variables have to be changed. (like EVAIDE). The changes are rather small. Without changes the software will still work with bios 2.xx, but not in the future with bios 3.xx. Jon Sunrise for MSX Team **** Problems? contact [EMAIL PROTECTED] See also http://www.faq.msxnet.org/ ****