16-bit era - 16-bit NEO-GEO MVS was designed in 1988-1989, debuted in Japanese arcades in 1989 (IIRC) and as a console in 1990 in Japan, in U.S. arcades in 1990, and console in 1991 in the U.S. By far the most well known NEO-GEO and the only one that became a console.
The three Neo Geo CD systems were the same generation, the same architecture as the 16-bit MVS & AES, the Neo CD was just an alternative with cheaper media.
Several generations of NEO-GEO successors were in development or in planning with SNK / SNK-Playmore but only one of them made it to arcades, none of them made it home as a console.
32-Bit era - SNK's 32-bit NeoStar (or NEO-STAR) Thought at first to be a CD-ROM addon + upgrade for the 16-bit NEO-GEO AES. It turned out NeoStar was being developed as a seperate system with a new 14 MHz RISC processor.
64-bit era - SNK's 64-Bit Hyper Neo Geo 64 - had impressive specs but unimpressive results both in performance and sales. only a handful of games were developed. Released AFTER Sega's MODEL 3 platform, yet looked only on par with MODEL 2 and only somewhat better than PS1. died quickly.
the portable era - SNK's 16-bit NEO-GEO Pocket and NEO-GEO Pocket Color - these guys had less capability than their big console brother and the GBA, but the NGPC offered better pocket thrills than Sega's GameGear or Nintendo's GameBoy Color.
128-bit era - The SNK Millennium 128. An SNK system of the PS2 generation that was in development. This thing was going to use a Matrox GPU pushing 450 million polygons (a PR spec like Xbox's 300 million polygons). this would've been the first NEO-GEO with "good" 3D capabilities. The last hardware project by SNK-Playmore that has any even semi documented proof of existance. The plug was pulled before this thing ever got into the arcades let alone the home.
The current generation - a "256-bit generation" system ? SNK's president mentioned in 2003 the possibility of a new NEO-GEO of the Xbox2, PS3 generation. no info on this pretty much imaginary system. Just that someone dreamed of building it.
The three Neo Geo CD systems were the same generation, the same architecture as the 16-bit MVS & AES, the Neo CD was just an alternative with cheaper media.
Several generations of NEO-GEO successors were in development or in planning with SNK / SNK-Playmore but only one of them made it to arcades, none of them made it home as a console.
32-Bit era - SNK's 32-bit NeoStar (or NEO-STAR) Thought at first to be a CD-ROM addon + upgrade for the 16-bit NEO-GEO AES. It turned out NeoStar was being developed as a seperate system with a new 14 MHz RISC processor.
November 93, Issue no. 5, European The Official NEO GEO Club Newsletter
Neo Geo CD-ROM
Via well placed sources close to the developement team working on the next generation of SNK cartridge machines, information and an artist?s impression has been given for what the next machine to be launched by the company could look like.
The machine is being considered to be called the Neo-Star, and is a much bigger system than the one we have all become familiar with for these past three years. The main differences are obvious from the artist's impression, showing clearly the new dual CD-1/CD-ROM drive, able to play special Neo Geo games.
The next major improvement of the machine is the wire-less, Infra-Red joysticks, allowing the player to sit well away from the machine but still able to control the action on screen. The other feature is the new larger capacity memory card, which is a specially created card disk storage device able to hold 20x more information, and rumoured to be used in the planned new Home-banking service that would be available for Japanese users.
The last major external change to the machine is the inclusion of an Expansion Port that will allow the system to be plugged into a number of new add-ons due to follow the release of the machine.
The specifications of the unit are still shrouded in secrecy, and will undoubtedly change as SNK up-grade or down-grade certain features to keep the machine at a certain price point, but the rough out-line has been made exclusively to our reader.
The Neo-Star is proposed to be a 32-bit system, against the original 16-bit of the Neo Geo, and will use RISC central processing units, and is claimed to have a clock speed of around 14.5 MHz, that will make is seven faster than any of the competition.(five times faster than the Neo Geo).
The machine is meant to be capable of a resolution of 640 x 480 pixels, and uses a new Super-Scart system to increase the resolution of the normal displays it is connected to. No details on the number of colours or the speed at which it will be able to move sprites around, but we will have to wait for that information as other manufacturers will also be keen to know it.
The big news is that the machine is aiming to be able to do polygon graphics and there is speculation that the Neo-Star could be the first 3D games machine that will be able to create truly interactive virtual reality style games. The CD-1 Features allows for movie quality sound/graphics to be played with video game interaction via the cartridges. The CD-Rom dual feature allows for bigger games to have extra graphics or information stored on special CD?s.
The machine has Infra-Red joystick controllers, as well as sockets for normal joysticks meaning that four players could take part in one game. The new joysticks are made to be lighter and more comfortable than the original with a new palm grip, and a head-phone socket built-in. Special surround sound sockets are also included on the machine allowing it to be plugged into a stereo Hi-Fi to offer mind blowing sound.
The expansion Port must be the one feature that has the most potential, with suggestions of a new cable-TV/Modem connector that would allow multi-player gaming, as well as home-banking features, buying goods off the TV. Along with a 3D goggles system, and best of all a keyboard facility, (possibly to be used in-conjunction with the home-banking features).
For all you Neo Geo owners that do not want to give up their machines, there is a speculation that SNK are talking about creating a Neo-CD unit that will allow existing Neo Geo's to be plugged into a kind of CD drive unit, offering some of the features of the Neo-Star. The unit is being considered to be launched before the replacement system.
64-bit era - SNK's 64-Bit Hyper Neo Geo 64 - had impressive specs but unimpressive results both in performance and sales. only a handful of games were developed. Released AFTER Sega's MODEL 3 platform, yet looked only on par with MODEL 2 and only somewhat better than PS1. died quickly.
the portable era - SNK's 16-bit NEO-GEO Pocket and NEO-GEO Pocket Color - these guys had less capability than their big console brother and the GBA, but the NGPC offered better pocket thrills than Sega's GameGear or Nintendo's GameBoy Color.
128-bit era - The SNK Millennium 128. An SNK system of the PS2 generation that was in development. This thing was going to use a Matrox GPU pushing 450 million polygons (a PR spec like Xbox's 300 million polygons). this would've been the first NEO-GEO with "good" 3D capabilities. The last hardware project by SNK-Playmore that has any even semi documented proof of existance. The plug was pulled before this thing ever got into the arcades let alone the home.
SNKs next generation Neo Geo console, the SNK Millennium looks like will be powered by a Matrox 3D graphics chip pumping out 450 million polygons and 30.2 GigaPixels per second. Neo Geo mailing list revealed :
SNK MILLENIUM
CPU INTEL PENTIUM LOGIC INOVATION IV TO 900 MHZ
Graphic card 3D MATROX CHIPSET GPUN (G800?)
Polygons 450 million Polygons per second
Textures 30.2 GigaPixels per second? damn high!
Memory 128 Mb to 300 Mhz
Speed DVD and CD DVD TO 6X AND CD AT 32X
Sound Stereo with 128 channels
S.O. Microsoft C.E. or SNK Control Panel
Modem 128 Bps.
Matrox G800 Rumour Details :
Pin compatible with G450
Double fillrate of G450 (450 million polygon/s?)
Support for 250MHz DDR FCRAM
Support for Hardware T&L
Support for DirectX 8.0 Shader and fully functional DX7
New DX7, 8 IDC drivers
Mass production : Sept. 2000.
Dual G800
This info was gathered from old NeoGeo mailing list threads.
The current generation - a "256-bit generation" system ? SNK's president mentioned in 2003 the possibility of a new NEO-GEO of the Xbox2, PS3 generation. no info on this pretty much imaginary system. Just that someone dreamed of building it.
_ For when it designs SNK-Playmore, a new Neon version Geo, more outpost than its present system MVS/AES, in the next years. It could be, along with similar Sony Ps-3, and Microsoft X-Box 2, and other systems, for the next generation of 256 bits.