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 informations and scores tables in [[MVS systems]], called [[backup RAM]] in this case. | |||
Battery powered RAM (made non-volatile) used to store cab related informations and scores tables in [[MVS systems]]. | |||
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 functions]] are used to handle the specific save format, although read/writes can be freely done | [[BIOS calls|BIOS functions]] are used to handle the specific save format, although read/writes can be freely done by the game's [[68k]] program. | ||
==Battery replacement== | ==Battery replacement== | ||
Revision as of 23:31, 3 September 2011
Battery powered RAM (made non-volatile) used to store cab related informations and scores 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 functions 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...