GCC started out making mod-kits for arcade video games.
Super Missile Attack was sold as an enhancement board to
Atari, Inc.'s
Missile Command. Atari sued, but ultimately dropped the suit and hired GCC to develop games (and stop making enhancement boards for Atari's games without permission). They created an enhancement kit for
Pac-Man called
Crazy Otto which they sold to
Midway, who in turn sold it as the sequel
Ms. Pac-Man; HyperDrive was unusual because the original Macintosh did not have any internal interfaces for hard disks. It was attached directly to the
CPU, and ran about seven times faster than Apple's "Hard Disk 20", an external hard disk that attached to the floppy disk port. The HyperDrive was considered an elite upgrade at the time, though it was hobbled by Apple's
Macintosh File System, which had been designed to manage 400K
floppy disks; as with other early Macintosh hard disks, the user had to segment the drive such that it appeared to be two or more partitions, called Drawers. In June 1985 Apple announced that installing GCC peripherals would not violate its warranty prohibiting installing non-Apple components. GCC said that it had cultivated the relationship by providing products to Apple employees. The second issue of
MacTech magazine, in January 1985, included a letter that summed up the excitement: In 1986 GCC shipped the HyperDrive 2000, a 20MB internal hard disk that also includes a
Motorola 68881 floating-point unit, but the speed advantage of the HyperDrive had been negated on the new
Macintosh Plus computers by Apple's inclusion of an external
SCSI port. General Computer responded with the "HyperDrive FX-20" external SCSI hard disk, but drowned in a sea of competitors that offered fast large hard disks. General Computer changed its name to GCC Technologies and relocated to
Burlington, Massachusetts. They continued to sell
laser printers until 2015, at which point the company was disestablished. ==Employees==