The Intellivoice Voice Synthesis Module, commonly abbreviated as Intellivoice, is an adapter for the Intellivision, Mattel's home video game console, that utilizes a voice synthesizer to generate audible speech. The Intellivoice is a large, brown cartridge that plugs into the Intellivision's side-mounted cartridge slot; games specifically designed for the device can then be inserted into a slot provided on the right-hand side of the module. An international version of the Intellivoice was planned, but never released. The Intellivoice was discontinued in 1983 due to poor sales, with only five titles released with support for the device. Despite this, it has been called an important innovation in gaming, since the Intellivoice software used speech as an important gameplay element. Development In the late 1970s and early 1980s, General Instrument, like nearly every microelectronics manufacturer, was rolling out their own series of microprocessors and support chips in hopes of gaining a share of the then-new and rapidly exploding market for increasingly sophisticated consumer and industrial electronics. One of the peripheral and support chips introduced for G.I.'s microprocessors was the SP0256 Narrator speech synthesizer chip. Since the Intellivision was based on General Instrument's CP1610 microprocessor and support chips, and talking electronic products (such as Texas Instruments' Speak & Spell) had already captured the public's fascination, Mattel Electronics decided to develop an add-on speech-synthesis module for the console. Engineer Ron Carlson was put in charge of designing a device capable of utilizing the chip. Programmer Ron Surratt was hired to write the software for the module, and Patrick Jost would analyze the voice data for the device. The Narrator had 2kB of Read-Only Memory (ROM), and this was utilized to store a database of generic words that could be combined to make phrases in Intellivision games. The words included numbers, "press," "enter," "and," "or," and "Mattel Electronics Presents" in a generic male voice. These phrases (as well as the speech for the first game, Space Spartans) were recorded and digitized by Carlson and Jost at General Instrument's facility in New York, and the resulting data was turned into a mask so that a customized version of the SP0256 could be manufactured with the generic phrases permanently stored inside the chip. Since the Orator chip could also accept speech data from external memory, any additional words or phrases needed for specific games could be stored inside the game cartridge itself. According to Ron Surratt, when