SJROM

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SJROM (NES-SJROM and HVC-SJROM) is a common board within the SxROM set. Like other SxROM boards, SJROM uses the Nintendo MMC1 ASIC.

Overview

  • PRG ROM size: 128 or 256 KB (DIP-28/32 Nintendo pinout)
  • PRG ROM bank size: 16 KB or 32 KB
  • PRG RAM: 8 KB with optional battery
  • CHR capacity: 16, 32 or 64 KB ROM (DIP-28 standard pinout)
  • CHR bank size: 8 KB or 4 KB
  • Nametable mirroring: Controlled by mapper
  • Subject to bus conflicts: No

Solder pad config

  • PRG RAM retaining data : 'SL' disconnected, Battery, D1, D2, R1 and R2 present.
  • PRG RAM not retaining data : 'SL' connected, leave slots for Battery, D1, D2, R1, and R2 free.

See also

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