Mastodawn

DolphinDOS 2: Fixing a 35-Year-Old Bug That Never Was

DolphinDOS 2 is a replacement ROM for the Commodore 64 and its 1541 floppy disk drive that dramatically speeds up disk access by using a parallel cable between the two machines. Instead of the glacial CBM serial bus, data transfers happen byte-at-a-time over an 8-bit parallel port, making loads roughly 25x faster. I’ve been maintaining