Video game storage media

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A video game ROM cartridge.

Video game storage media refers to the various forms of data storage which have been used by video games over the years. There are three primary forms of media: chip, magnetic, and optical.

Storage Media Types

Chip

Storage media in this category is stored on various forms of read only memory (ROM).

ROM cartridge

The contents of an NES game pak.

The dominant video game storage media from the 1970s to the 1990s was the ROM cartridge. It was used in about 50 different consoles, and each one was unique. Most ROM cartridges consists of a printed circuit board (PCB), one or more ROM chips — usually PROMs, a connector to connect to the console, and a case to protect the board. Cartridges may contain additional expansion circuitry, a RAM chip with a battery for saving information, or other features.

Advantages:

  • By connecting directly to the console's hardware, they have little to no loading time.
  • Since they're on a PBC, they can contain expansion hardware that was not part of the console's original design. This is the only media which can easily do this.
  • Because they connect directly to the hardware, you didn't need to buy a special reader like a floppy disk drive.
  • By using a unique format, they were much harder to pirate than other forms of media.
  • Their plastic shells tend to make them very rugged.

Disadvantages:

  • They're much more expensive than other forms of media, costing dozens of times more to produce.
  • They were much more limited in capacity. When diskettes were pushing two megabytes, ROMs were around 32 kilobytes.
  • Since they are part of the hardware directly, they aren't removable. This means, a developer can't make a larger game by spanning it across several ROM cartridges the way they could with other medias.

Memory card

An SG-1000 memory card.

Memory cards are very similar to ROM cartridges, but they use a smaller footprint. Instead of using full ROM chips, they usually use the internals of the ROM without the package and cover them with a protective glob of black plastic. Some memory card manufacturers used EPROMs or EEPROMs which could be be written to as well.

Early memory cards were used on the SG-1000, Sega Mark III, MSX, PC-Engine, and TurboGrafx-16. Later versions of the memory card, like those used by the Nintendo DS, Nintendo DSi, PS Vita, Nintendo 3DS, and Switch use flash memory instead of ROM chips.

Advantages:

  • By connecting directly to the console's hardware, they have little to no loading time.
  • By using a unique format, they were much harder to pirate than other forms of media.

Disadvantages:

  • All the same disadvantages that apply to ROM cartridges apply to memory cards.
  • While they technically can support hardware expansion like a ROM cartridge, they are so compact, it was rarely feasible.

Magnetic

Magnetic storage media uses a thin magnetic sheet, usually in the form of a disc or tape, which can store information digitally by exposing it to a strong magnetic field.

Diskette

A translucent 3.5" floppy diskette.

Diskettes use a circular sheet of magnetic tape inside a case. Nearly all forms of them can be read from and written to. As the name suggests, they were originally sold with floppy plastic cases, but later models used rigid cases. The first floppy diskettes released in 1972 were eight inch squares and were used almost exclusively for business use. In 1976, the five and a quarter inch models were released saw heavy use in the home computer gaming market being made available on nearly every 8-bit and 16-bit home computer. In 1982 the three and a half inch rigid model was released which became the last wide-spread diskette to be used.

A few other custom diskettes were developed like the three inch Quick Disk, which was used by Nintendo for their Famicom Disk System as well as a number of other models that never really used for video games.

Diskettes were initially single sided, however some drives would allow the user to flip the diskette over to read and write to the other side. Later model drives contained two read and write heads which could use both sides of the diskette without having to flip it. The information capacity of floppies grew over time. The original single density eight inch diskette in 1972 holds 175 kB, the five and a quarter double density diskette in 1978 holds 360 kB, the three and a half inch double-sided double density diskette in 1980 holds 720 kB, and the high density model in 1986 hold 1.44 megabytes.

Advantages:

  • Because they're little more than plastic, floppy diskettes were very cheap to make compared to the other media of the time.
  • Diskettes could hold far more information than the ROM-based media at the time. When diskettes first hit 2 megabytes, ROM chips were still around 32 kilobytes.

Disadvantages:

  • Reading data from a floppy diskette is slow. Depending on the drive, a floppy disk could take seconds to minutes to be read in its entirety.
  • Because they used an industry-standard format, pirating diskettes is incredibly easy to do.
  • With only a flexible plastic shell, floppies aren't very rugged.
  • Since they use a magnetic field to read and write data, exposure to magnets could easily corrupt the data on diskettes. In fact, many diskettes tend to go corrupt after prolonged periods of time.

Cassette tape

A compact cassette tape.

Although they're most commonly associated with music, compact cassette tapes were used as data storage by many 8-bit home computers, and even a few 8-bit video game consoles. Depending on the quality of tape and the recorder, data could be stored at around 2000 bits per second, or about 660 kilobytes per side on a 90-minute tape. However, since the tape was read from and written to at the same speed as audio tape, it would require 90 minutes to write or read each side of the tape as well. Special streamer cassettes were produced which could store data at a much higher density. While the cassette saw widespread use in the 1970s, it began to decline in the early 1980s as the capacity of floppy diskettes increased.

Advantages:

  • Though not as cheap as a diskette, cassettes were still much cheaper to manufacture than chip-based media.
  • Even at their lower densities, cassettes could store a decent amount of data because of their long tape length.
  • Because they were an older technology, the tape recorders use to read and write to the tapes were cheaper than diskette drives.

Disadvantages:

  • Reading and writing to cassettes is incredibly slow. It would take three hours to read or write to both sides of a 90-minute tape!
  • Although it's enclosed in a hard plastic case, a large portion of the tape is exposed at the bottom of the cassette. This makes it easy for it to become caught on something and damaged. In fact, cassette players were notorious for despooling the tape.
  • Pirating cassettes was even easier than diskettes.

Hard disk drive

Although video games were almost never sold on hard drives, most home computers and modern consoles store games on them. Especially those downloaded from the Internet. Many hard drives are switching from magnetic disks to flash memory like a solid state drive (SSD) or non-volatile memory express (NVMe).

Advantages:

  • Byte-for-byte, hard disk drives are the cheapest data storage possible.
  • Hard disk drives typically have very fast read and write compared with diskettes, though still slower than chips.

Disadvantages:

  • Since they're magnetic, data stored on them can be corrupted by coming in contact with a strong magnetic field, though this is very unlikely when housed in a computer or console.
  • Since they contain a lot of moving parts, they tend to break down sooner than most of other forms storage.

Optical

Optical storage is the most recent of the three main categories. It uses a laser to read incredibly tiny pits on a polycarbonate layer on the disc. Although there are a variety of different formats the data is stored in, and a number of different laser technologies which increase the density of information which can be stored, each uses the same theory.

Optical Disc

The bottom of an optical disc.

For video games, the most commonly used formats include CD-ROM, Mini CD, DVD, Blu-ray, and Ultra HD Blu-ray. However, over the years a couple less-common industry standards were used, and many companies have created their own formats in an effort to better control the distribution of their games. The media didn't really catch on until the mid-1990s, but, when it did, it displaced almost every other form of portable media. ROM cartridges continued to be used for some portable platforms into the 2000s, but those were displaced by memory cards.

Advantages:

  • Of all the different storage medias, optical discs are by far the cheapest to manufacture. They're little more than a disc of layered plastic.
  • With such a high level of information density, the discs can store far more information than other forms of media except hard drives. The first CD-ROMs released in 1986 could hold around 600 megabytes, about 400 times more information than diskettes of the same time could hold.
  • With each new optical disc format, there were a few years when piracy was very difficult until the release of a writable form of that disc format.

Disadvantages:

  • Optical discs are easily scratched, and even a tiny scratches in an important area makes them useless.

Other storage media

Paper

Source code printed on paper.

Back when storage media was expensive and before people had access to the Internet, is was common to release software as source code printed on paper in books or magazines. This was sometimes referred to as "paperware."

Advantages:

  • Since you're only paying for printed paper, the software was usually quite cheap.

Disadvantages:

  • Because it was being released as source code, you couldn't expect to buy impressive software using this method. Most of it was software that was available on university networks for free.
  • Having to type in the source code of a long program was painstaking and, prior to error-checking IDEs, it was very difficult to spot and fix typos.
  • The published source was usually from a cheap line printer then reduced in size to fit into a book, so the quality was often terrible which made it hard to read.
  • Unless the source was in BASIC, a language that pretty much every computer had at the time, you would need to provide your own compiler, which wasn't always easy to get.

Protectors

With each different type of storage media, a new protective covering was created. Some storage media has a protective case built into the design.

ROM cartridge

Memory card

Diskette

Cassette tape

Optical disc

Hard disk drive

Support by Platform

Platform Released ROM Card Disk Tape HDD CD DVD BluRay UHDBR
Apple II 1977-06-10 Yes Yes
Apple IIgs 1986-09-15 Yes
Atari 400/800 1979-11-?? Yes
Atari 2600 1977-09-?? Yes
Atari 5200 1982-11-?? Yes
Atari 7800 1986-05-?? Yes
Atari ST 1985-06-?? Yes
CD-i 1990-??-?? Yes
Channel F 1976-11-?? Yes
ColecoVision 1982-08-?? Yes
Commodore 64 1982-08-?? Yes Yes Yes
Commodore PET 1977-12-?? Yes Yes
Commodore VIC-20 1980-??-?? Yes Yes
Dreamcast 1998-11-27 Yes
Famicom 1983-07-15 Yes
Famicom Disk System 1986-02-21 Yes
FM-7 1982-11-?? Yes Yes
Game Boy 1989-04-21 Yes
Game Boy Advance 2001-03-21 Yes
Game Boy Color 1998-10-21 Yes
GameCube 2001-09-14 Yes
Game Gear 1990-10-06 Yes
Genesis 1989-08-14 Yes
IBM PCjr 1984-03-?? Yes Yes
IBM Personal Computer 1981-08-12 Yes Yes
Intellivision 1980-??-?? Yes
Lynx 1989-09-01 Yes
Macintosh 128K 1984-01-24 Yes
Master System 1986-09-?? Yes Yes
Mega Drive 1988-10-29 Yes
N-Gage 2003-10-07 Yes
Nintendo 64 1996-06-23 Yes
Nintendo 64DD 1999-12-13 Yes
Nintendo 3DS 2011-02-25 Yes
Nintendo DS 2004-11-21 Yes Yes
Nintendo Entertainment System 1985-10-18 Yes
Odyssey² 1978-09-?? Yes
PC-8800 1981-11-?? Yes Yes
PC-9801 1981-11-?? Yes
Pico 1993-06-?? Yes
PlayStation 1994-12-03 Yes
PlayStation 2 2000-03-04 Yes Yes Yes
PlayStation 3 2006-11-11 Yes Yes Yes
PlayStation 4 2013-11-15 Yes Yes Yes
PlayStation 5 2020-11-12 Yes Yes Yes Yes
PlayStation Portable 2004-12-12 Yes
Saturn 1994-11-22 Yes
Sega CD 1991-12-12 Yes
Sega Mark III 1985-10-20 Yes Yes
Sharp X1 1982-??-?? Yes Yes
Super Famicom 1990-11-21 Yes
Super Nintendo Entertainment System 1991-08-23 Yes
Switch 2017-03-03 Yes
TRS-80 Color Computer 1980-09-?? Yes Yes
TRS-80 Model I 1977-08-03 Yes Yes
TurboGrafx-16 1987-10-30 Yes
TurboGrafx-CD 1988-12-04 Yes
Super CD-ROM² 1991-??-?? Yes
Vita 2011-12-17 Yes
Wii 2006-09-19 Yes Yes
Wii U 2012-11-18 Yes Yes Yes
WonderSwan 1999-03-04 Yes
WonderSwan Color 2000-12-09 Yes
Xbox 2001-11-15 Yes Yes Yes
Xbox 360 2005-11-22 Yes Yes Yes Yes
Xbox One 2013-11-22 Yes Yes Yes Yes
Xbox Series X/S 2020-11-10 Yes Yes Yes Yes
ZX Spectrum 1982-04-23 Yes

Media

Videos

The 8-Bit Guy - How ROM cartridges work.