CD BackUp RAM Cart
From Sega Retro
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CD BackUp RAM Cart | |||||||||||||||
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Made for: Sega Mega-CD | |||||||||||||||
Manufacturer: Sega | |||||||||||||||
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The CD BackUp RAM Cart or Backup RAM Cartridge (バックアップRAMカートリッジ) is a memory card designed for the Sega Mega-CD that plugs into the Sega Mega Drive cartridge port. It is for use with Mega CD games which require the user to save, as unlike ROM cartridges, there is no way of saving data on the disc itself. The unit contains 2045 blocks (1 Mbit) of memory for game saves.
For the North American version, the cart resembles a regular Genesis cartridge, aside from a blue edging saying "Sega CD", as opposed to the usual red edging found on standard Genesis cartridges. Some RPGs - most notably Shining Force CD - used this for memory, as there was often not enough space for the save files in the internal backup RAM. In the case of Shining Force CD, this cartridge allows the player to unlock the last story segment of the game, inaccessible without the backup cart due to the Sega CD's internal memory limitations.
Contents
Maximum capacity
While the only officially-released RAM cartridge for the Sega CD has a capacity of 1 Mbit (128 KB; 2045 blocks), the system actually supports up to 4 Mbit (512 KB; 8189 blocks). The memory size is specified by a 3-bit value mapped to Main 68000 address $400001. This value indicates the memory size as a power of two, multiplied by the base memory size of 8 KB.
3-bit Value @ $400001 |
Size (Kbit) | Size (KB) |
---|---|---|
000 | 64 Kbit | 8 KB |
001 | 128 Kbit | 16 KB |
010 | 256 Kbit | 32 KB |
011 | 512 Kbit | 64 KB |
100 | 1024 Kbit | 128 KB |
101 | 2048 Kbit | 256 KB |
110 | 4096 Kbit | 512 KB |
111 | not present |
List of compatible games
- A-Rank Thunder Tanjouhen
- After Armageddon Gaiden: Majuu Toushouden Eclipse
- Aisle Lord
- Alshark
- Arcus I-II-III
- Bakuden Unbalance Zone
- Black Hole Assault
- Burai: Hachigyoku no Yuushi Densetsu
- Cyborg 009
- Dark Wizard
- Death Bringer
- Detonator Orgun
- Dungeon Master II: Skullkeep
- Dynamic Country Club
- Egawa Suguru no Super League CD
- Eye of the Beholder
- F1 Circus CD
- Formula One World Championship: Beyond the Limit
- Gambler Jiko Chuushinha 2: Gekitou! Tokyo Mahjong Land Hen
- Genei Toshi
- Genghis Khan II: Clan of the Gray Wolf
- Heimdall
- Ishii Hisaichi no Daiseikai
- Jaguar XJ220
- Jango World Cup
- Jurassic Park (Mega-CD)
- Lodoss-tou Senki: Eiyuu Sensou
- Lunar: Eternal Blue
- Lunar: The Silver Star
- Mahou no Shoujo: Silky Lip
- Mega Schwarzschild
- Might and Magic III: Isles of Terra
- Nobunaga no Yabou: Haouden
- Panic!
- Popful Mail
- Pro Yakyuu Super League CD
- Psychic Detective Series Vol. 3: AÝA
- Psychic Detective Series Vol. 4: Orgel
- Rise of the Dragon
- Romance of the Three Kingdoms III: Dragon of Destiny
- Seima Densetsu 3x3 Eyes
- Shin Megami Tensei
- Shining Force CD
- SimEarth
- Sonic the Hedgehog CD
- StarBlade
- The Third World War
- Thunderhawk
- Urusei Yatsura: Dear My Friends
- Vay
- Warau Salesman
- Wing Commander
- Winning Post
- Yumemi Mystery Mansion
- Yumimi Mix
Magazine articles
- Main article: CD BackUp RAM Cart/Magazine articles.
Physical scans
External links
References
Sega Mega-CD | |
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Topics | Technical specifications | History | Magazine articles | Promotional material |
Hardware | Mega CD (Asia | North America | Western Europe | Eastern Europe | South America | Australasia | Africa) Sega Multi-Mega (Asia | North America | Europe | South America | Australasia) Wondermega | LaserActive | CSD-G1M |
Misc. hardware | CD BackUp RAM Cart | Mega-CD Karaoke | Pro CDX |
Development tools | SNASM Mega-CD | PsyQ Mega-CD SDK | PSY-Q CD Emulation System (Mega-CD) |
Unreleased hardware | Game Genie |