Hardware description languages (HDLs)

• Abel (~1983)

  • Developed by Data-I/O
  • Targeted to PLDs
  • Limited capabilities (can do state machines)

• Verilog (~1985)

  • Developed by Gateway (now part of Cadence)
  • Similar to C

• VHDL (~1987)

  • DoD sponsored
  • Similar to Ada

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