EPROM

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Where to get them

List of common parts

128 kilobit / 16kb / 8 bit

32 pin DIP package

  • 27c128

256 kilobit / 32kb / 8 bit

32 pin DIP package

  • 27c256

512 kilobit / 64kb / 8 bit

32 pin DIP package

  • 27c512

1 megabit / 128kb / 8 bit

32 pin DIP package

  • 27C1001
  • 27C010


  • 27c1000 - different pin-out from 27C1001/27C010

1 megabit / 128kb / 16 bit

40 pin DIP package

  • 27c1024
  • 27c210

Common use

  • Neo Geo BIOS

2 megabit / 256kb 8 bit

32 pin DIP package

  • 27c020
  • 27c2001

2 megabit / 256kb 8 and 16 bit

40pin DIP package

  • 27c2001

4 megabit / 512kb / 8 bit

32pin DIP package

  • 27c040
  • 27c4001

4 megabit / 512kb / 8 and 16 bit

40pin DIP package

  • 27c400
  • 27c402

4 megabit / 512kb / 16 bit

40pin DIP package

  • 27c240
  • 27c4002
  • 27c4096

Common use

Main program on CPS2


8 megabit / 1024kb / 8 bit

32pin DIP package

  • 27c080
  • 27c801

8 megabit / 1024kb / 8 or 16 bit

42pin DIP package

  • 27c800

16 megabit / 2048kb / 8 or 16 bit

42pin DIP package

  • 27c160

Common use

  • Naomi 1 & 2 BIOS

32 megabit / 4096kb / 16 bit

42pin DIP package

  • 27c322