XTra-RAM

512K RAM Expansion for XT PCs

XTra-RAM Image XTra-RAM Image

512K RAM Expansion (8bit ISA) for XT class PCs and earlier with configurable banks

Features

  • 512K RAM
  • 8 x 64K banks
  • Each bank can be independently configured as:
    • Low Address
    • High Address
    • Disabled

BOM (THT)

  • 16 x 10 KOhm resistors
  • 1 x 74LS245 20pin DIP
  • 2 x 74LS157 16pin DIP
  • 1 x 74LS151 16pin DIP
  • 1 x AS6C4008-55PCN SRAM 32pin DIP
  • 5 x 100nF Ceramic Capacitors
  • 2 x 47uF Electrolytic Capacitors
  • 1 x 10uF Electrolytic Capacitor
  • 2 x 8-pole DIP switches

IC sockets optional