CXK5864

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Sony CXK5864 8kByte RAM found on a MVS board.

Sony RAM chip.

The CXK58257 (32kByte) is also used as VRAM, for battery-backed RAM and as the 68k's RAM.

Usage:

  • VRAM: 2*CXK58257 + 2*CXK5864 = 96KiB
  • 68k RAM: 2*CXK58257 = 64KiB
  • SRAM: 2*CXK58257 = 64KiB