At this point, the Commodore 64 computer was an established system, and all the major computers players, such as Apple, Atari, Commodore, and IBM had their systems licensed, and building their own computers was essentially impossible without the help of another computer manufacturer. And the Commodore 64 was the first to add a graphical interface to its computer. It didn't have a case or accessories like a monitor and keyboard just like most computers of the day, Commodore 64 computer uses a single floppy disc drive so Commodore 64 owners were limited to using their computers in floppy drive emulation mode remaking them into real retro computers. This was the D format.
In 1987, Commodore released the 64DD and 256DD. They were designed for use with a home C64 and home-based LAN using 1000bit/s Fast Ethernet. The 64DD and 256DD traditionally supported Microsoft ROMs, which were read as 63.5 kB in a two-sector format. The 63.5 kB read limit for using a RAMDrive was the limit when a machine of this type was sold new and never changed. Commodore Licensing Limited (CLL) had to install an additional 10,100bit/s RJ45 socket on the case to support Fast Ethernet. There was also a requirement for the programmer to release the program code in advance of its removal to protect copyright. Under license restrictions, other than using standard C64 ROMS, the Open Firmware on the 64DD and 256DD enabled a ROM drive of up to 4MB (with 32KB sector size) using a SmartMedia formatted MMC, SD, or PCMCIA memory card, allowing the computer to be used with additional ROM areas in addition to the 255Z and 256Z ROMs.
In 1979, Commodore released the C64. This was the first Atari 8-bit computer and the computer used a MOS 6502 chip and 64k of memory. Commodore 64 was designed to allow like-minded people to have something to do over the holidays - on Christmas Eve. d2c66b5586