Memory card

JEIDA V3 memory cards used in AES and some MVS systems to store game saves and/or high scores. The original SNK card could only hold 2KiB of data. The Neogeo can use up to 8MiB (24 address lines but A23 never used) ?



The official SNK memory card was a battery-based 2KiB card using a LH5116 CMOS SRAM chip and voltage switching circuitry. Data retention voltage: 2V.

The SP-S2 BIOS can only handle 8bit memory cards up to 16KiB ? (bank checking while format up to $8000/2). Seems the file checking can only go up to 256 so 16 files * 16 games * 64 bytes = 16KiB too.

Replaced by a 8KiB fixed battery-backed RAM chip in the CD systems.

See the CARD BIOS call description for memory card operations.

[(from neogeoprotos.com)]

[Data format (from Raregame.ru)]

=Data format=

To do.

=Card pinout=