Users could buy a blank disk, take it to a vending machine and copy new games onto it. A disk-based system allowed Nintendo to sell Famicom games at a significant discount, plus it opened the door to a vending machine distribution system. DF Direct is Digital Foundry's weekly discussion show - and this latest episode is all about the Famicom Disk System.īut why release a disk system at all? The bottom line was that the ROM chips required for cartridges were very expensive and chip shortages created supply issues. This meant that data had to be read in a linear manner, more like a tape deck rather than a standard floppy drive. Nintendo's adjustments to the system included a different casing with embossed Nintendo branding that formed part of the copy protection system, while the two drive head motors used in a standard Mitsumi drive was pared back to just one in the FDS. Other disks actually shipped with different games on each side. It's not exactly a prodigious speed, meaning that some games would have prolonged loading times while others would have an initial load from one side of the disk, before prompting the user to turn over for the data used during gameplay. The disks supported a total of 128K split into roughly 56K per side, while loading bandwidth worked out at around 12K per second. Often considered to be running a variant of standard floppy disks, the FDS was actually based on another system: Mitsumi's Quick Disk format, with typical Nintendo customisation. Interestingly, while the FDS could be powered by an AC adaptor, a slot allowed users to power the machine with C-type batteries that would last for months - the power supply bricks were large and power sockets were at a premium in more traditional Japanese homes. The ROM cartridge contained 32K of memory, 8K of CHR RAM along with an IO chip that also fed extra sound channels to the console via bespoke pins on the cartridge slot among other things. The unit could sit beneath the main console, attached to the unit via a serial cable that connected to a ROM cartridge that sits in the Famicom's cartridge slot. The system launched in Japan only, debuting in 1986 - three years after the Famicom itself. Nintendo's Famicom system was starting to flourish and while primarily cartridge-based, ideas from the home computer would crossover into the console world, resulting in the Famicom Disk System - or FDS - which did exactly what it said on the tin, offering disk-based software to run on the console we would eventually come to know as the Nintendo Entertainment System. In Western countries, the era of the console was effectively dead by the mid-1980s, with a flourishing home computer scene replacing it - but the situation was very different in Japan.
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