Battery-backed RAM: Difference between revisions
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[[File:Cd2_batram.jpg|thumb|right|8KiB for game saves on a CD1 board.]] | [[File:Cd2_batram.jpg|thumb|right|8KiB for game saves on a CD1 board.]] | ||
Battery powered RAM (made non-volatile) used to store cab related | Battery powered RAM (made non-volatile) used to store cab related information (bookkeeping) and score tables in [[MVS systems]], called [[backup RAM]] in this case. | ||
The [[:Category:CD systems|CD systems]] use it to store game saves instead of using [[memory card]]s. | The [[:Category:CD systems|CD systems]] use it to store game saves instead of using [[memory card]]s. | ||
[[BIOS calls|BIOS | [[BIOS calls|BIOS calls]] are used to handle the specific save format, although read/writes can be freely done by the game's [[68k]] program. | ||
=Battery replacement= | |||
NiMh/NiCd, CR2032, charging resistor removal... | NiMh/NiCd, CR2032, charging resistor removal... | ||
[[Category:Chips]] | [[Category:Chips]] | ||
[[Category:Base system]] | [[Category:Base system]] | ||
Revision as of 02:48, 12 May 2017
Battery powered RAM (made non-volatile) used to store cab related information (bookkeeping) and score tables in MVS systems, called backup RAM in this case.
The CD systems use it to store game saves instead of using memory cards.
BIOS calls are used to handle the specific save format, although read/writes can be freely done by the game's 68k program.
Battery replacement
NiMh/NiCd, CR2032, charging resistor removal...