Power Base Converter

From Sega Retro

SegaMegaAdaptor.jpg
Power Base Converter/Mega Adaptor/Master System Converter
Made for: Sega Mega Drive
Manufacturer: Sega Enterprises, Ltd.
Distributor: Ecofilmes (PT), Tec Toy (BR)
Release Date RRP Code
Sega Mega Drive
JP
¥4,5004,500 HAA-2600
Sega Mega Drive
US
$34.9934.99[2] 1620
Sega Mega Drive
DE
(II)
DM 69.9569.95[5]
Sega Mega Drive
UK
£29.9929.99[3] 1620
Sega Mega Drive
UK
(II)
£29.9929.99 MK-1621-50
Sega Mega Drive
IT
85,000£85,000[4]
Sega Mega Drive
CA
Sega Mega Drive
BR
Sega Mega Drive
AS

The Power Base Converter, known as Mega Adaptor (メガアダプタ) in Japan, Master System Converter in Europe and Adaptador Para os Jogos Master System in Brazil, is a peripheral for the Sega Mega Drive allowing it to play Sega Master System cards or cartridges.

Hardware

One of the key design features of the Mega Drive is its compatibility with its immediate predecessor, the Master System, as the Mega Drive's design is based upon the Master System's design, albeit enhanced and extended in many areas. As the cartridge slot of the Mega Drive is shaped differently than that of the Master System, and because its games could not be played directly through the Mega Drive, Sega released the Power Base Converter, an accessory that is placed between a Master System cartridge and the Mega Drive, allowing the user to play the previous generation of Sega games without the need for an extra console.

The Power Base Converter does not contain any Master System components but acts as a pass-through port. The converter contains two slots; a top slot for cartridge-based titles and a front slot for card-based games and accessories. The Power Base Converter would be fully compatible with the cost-reduced Mega Drive II, were it not for the different shape of the Mega Drive II's plastic casing.

In Europe the differently shaped Master System Converter II was released in order to satisfy Mega Drive II owners. This accessory is also fully compatible with the original Mega Drive, but lacks the ability to run cards.

Both 2-button Master System pads and standard Mega Drive pads can be used to play the majority of Master System games. Like the Master System, the PAUSE button is not part of the gamepad connector and instead is implemented as a push-button switch on the Power Base Converter or similar devices.

Technical information

In order to achieve backwards compatibility, the original Master System central processor and sound chip (the Z80 and SN76489) are included in the Mega Drive/Genesis and the new Video Display Processor is capable of the Master System VDP's mode 4 (though it cannot run in modes 0, 1, 2, or 3, so cannot run SG-1000 games). Once a Master System game is inserted, the system's bus controller chip (later integrated with the I/O chip into a single multi-purpose ASIC) will put the Z80 in control leaving the 68000 idle.

Incompatible games

Due to slight differences in how the Mega Drive control pads operate, some Master System games may inadvertently cause the wrong set of inputs to be selected and prevent the input from working properly. In these cases a Master System controller must be used.

The need for Master System controllers caused some problems, particularly in the US, where at the time the Power Base Converter was being sold in stores, Sega had withdrawn separate Master System controllers from general sale. As a result, consumers were forced to contact Sega directly.[6]

The list of games which require a Master System control pad is as follows:

All of these games will play properly with a Mega Drive controller on a Japanese Mega Drive or a console modified with a region switch (set to Japanese mode).

Alien 3, FA Tetris and F-16 Fighting Falcon are completely incompatible with the Power Base Converter. FA Tetris and F-16 Fighting Falcon in particular rely on a graphics mode designed for SG-1000 games, which is not available on the Mega Drive.

Gallery

Magazine articles

Main article: Power Base Converter/Magazine articles.

Promotional material

Sega HK advert BGI 2.png
HK advert
Sega HK advert BGI 2.png
Logo-pdf.svg
Print advert in (UK) #37: "October 1990" (1990-09-xx)
also published in:
  • (UK) #107: "October 1990" (1990-09-16)[7]
Logo-pdf.svg
Logo-pdf.svg
Print advert in (UK) #108: "November 1990" (1990-10-16)
also published in:
  • (UK) #38: "November 1990" (1990-10-xx)[8]
Logo-pdf.svg
Logo-pdf.svg
Print advert in (UK) #111: "February 1991" (1991-01-16)
Logo-pdf.svg
Logo-pdf.svg
Print advert in (FI) #2: "2/91" (1991-xx-xx)
Logo-pdf.svg
Logo-pdf.svg
Print advert in (FI) #3: "1/92" (1992-xx-xx)
also published in:
  • (FI) #4: "2/92" (1992-xx-xx)[9]
Logo-pdf.svg
Logo-pdf.svg
Print advert in (ES) #11: "Marzo 1993" (1993-xx-xx)
Logo-pdf.svg
Logo-pdf.svg
Print advert in (TW) #2: "xxxx xxxx" (199x-xx-xx)
Logo-pdf.svg

Physical scans

Mega Drive, JP
Megaadaptor box.jpg
Cover
Mega Drive, US
PowerBaseConverter MD US Box Front.jpg
Cover
Power Base Converter US Manual.pdf
Manual
Mega Drive, EU
MasterSystemConverter MD EU Box Top.jpg
MasterSystemConverter MD EU Box Back.jpgMasterSystemConverter MD EU Box Spine.jpgSega megadrive baseconverter box.jpgMasterSystemConverter MD EU Box Spine2.jpg
MasterSystemConverter MD EU Box Bottom.jpg
Cover
Mega Drive, EU (II)
MasterSystemConverterII MD EU Box Front.jpg
Cover
Mega Drive, PT
MasterSystem Converter MD GG box.jpg
Cover
Mega Drive, BR
APoJMS MD BR Box Front.jpg
Cover
Mega Drive, CA

Mega Drive, AS

External links

References


Sega Mega Drive
Topics Technical specifications (Hardware comparison) | History | List of games | Magazine articles | Promotional material | Merchandise | Cartridges | TradeMark Security System
Hardware Japan | North America | Western Europe | Eastern Europe | South America | Asia | South Korea | Australasia | Africa
EZ Games | Genesis 3 | LaserActive | Mega Jet | Mega PC | Mega Play | Mega-Tech System | Mega 6 | Nomad | Teradrive | Mega Drive Mini | Mega Drive Mini 2
New Mega Drive | Tianli VCD/DVD Players | "Consoles on a chip" | Licensed clones (Magic 2 | Mega Game II | Power Pegasus | Super Bitman)
Unlicensed clones
Add-ons Game Box | Power Base Converter | Mega-CD | 32X (Mega-CD 32X) | Mega Modem | Demo System DS-16
Cases Sega Genesis Nomad Carrying Case | System Carry Case
Controllers Control Pad | Six Button Control Pad | 6 Button Arcade Pad | Arcade Power Stick 6B | Konami Justifier | MK-1470
Action Chair | Activator | Arcade Power Stick | Keyboard | MegaFire | Mouse | Mega Stick | Menacer | Remote Arcade System | Ten Key Pad | Third Party Controllers
Accessories 4 Way Play | AC adaptor | Cleaning System | Control Pad Extension Cord | Game Factory | Genesis Speakers | Headset | HeartBeat Catalyst | Microphone | Region converter cartridges | Mega Terminal | Nomad PowerBack | RF Unit | SCART Cable | Stereo Audio Video Cable | Team Player | Video Monitor Cable | Third-party AC adaptors | Third Party Accessories
Network services Sega Channel | Sega Game Toshokan | Mega Anser | Mega Net | TeleBradesco Residência | XB∀ND
Development tools ERX 308P | ERX 318P | Sprobe | SNASM68K | SNASM2 (Mega Drive) | SNASM2 (32X) | PSY-Q Development System (Mega Drive) | PSY-Q Development System (32X) | 32X CartDev | Sega Mars Development Aid System | Sega 32X Development Target
Unreleased Edge 16 | Floppy Disk Drive | Mega Play 1010 | Sega VR | Teleplay System | Video Jukebox