| From: Karen Lewellen via talk <talk@gtalug.org> | In fact, the P3 or greater aspect is far more important than the ISO slot, if | that makes sense. Why do you need the power of a P III? Generally speaking, DOS software was built for much weaker processors (eg. 486 or older). | Although not installing freedos, it can manage more current hardware, so can | the DOS I run to some extent. | www.freedos.org FreeDOS looks like a good choice: it is still maintained. What DOS do you use? Here are some technical requirements that may make a recent machine unsuitable: DOS requires a BIOS as opposed to UEFI firmware. For about a decade, all machines came with UEFI firmware. But some UEFI firmware can emulate BIOS. FreeDOS requires that the disk be formated using MBR, not GPT. <http://wiki.freedos.org/wiki/index.php/UEFI> DOS requires disks to have 512-byte sector. That's less common these days -- most current drives 4096-byte sectors. Sometimes they can emulate 512-byte sectors. MBR disks are limited to 2TB or less: <https://en.wikipedia.org/wiki/Master_boot_record> FAT32 partitions are limited to 2TB as well: <https://en.wikipedia.org/wiki/File_Allocation_Table#FAT32> FreeDOS has supported FAT32 since 2002 (recent, in DOS terms). Does your DOS support FAT32?