Binary-compatible with the industry standard 68000 32-bit microprocessor

The D68000 soft core is binary-compatible with the industry standard 68000 32-bit microcoprocessor. It has a 16-bit data bus and a 24-bit address data bus. Of course, its code is compatible with the MC68008, upward code compatible with MC68010 virtual extensions and the MC68020 32-bit implementation of the architecture. Our efficient IP Core has an improved instructions set, which allows to execute the program with higher performance, than a standard 68000 core.
The D68000 is delivered with fully automated test-bench and complete set of tests, which allow easy package validation at each stage of SoC design flow.
A special testing platform has been built to run D68000 with uCLinux Operating System


Performance
Each core has been tested in variety of FPGA and ASIC technologies. Its implementation results are summarized below.

• Software compatible with 68000 industry standard
• MULS, MULU take 28 clock periods
• DIVS, DIVU take 28 clock periods
• Optimized shifts and rotations
• Idle cycles removed to improve performance
• Shorter effective address calculation time
• Bus cycle timings identical to 68000
• 32 bit data and address registers
• 14 addressing modes:
  • Direct:
    • Data register direct
    • Address register direct
  • Indirect:
    • Register indirect
    • Postincrement register indirect
    • Predecrement register indirect
    • Register indirect with offset
    • Indexed register indirect with offset
  • PC relative:
    • Relative with offset
    • Relative with index and offset
  • Absolute data:
    • Absolute short
    • Absolute long
  • Immediate data:
    • Immediate
    • Quick immediate
    • Implied
  • 5 data types supported:
    • bits
    • BCD
    • bytes, words and long words
  • Arithmetic Logic Unit includes:
    • 8,16,32-bit arithmetic & logical operations
    • 16x16 bit signed and unsigned multiplication
    • 32/16 bit signed and unsigned division
    • Boolean operations
  • Interrupt controller:
    • 7 priority levels interrupt controller
    • Unlimited number of virtual interrupt sources
    • Vectored and auto-vectored modes
  • Memory interface includes:
    • Up to 4 GB of address space
    • 16-bit data bus
    • Asynchronous bus control
  • M6800 family synchronous interface
    • 3- and 2- wire bus arbitration
    • Supervisor and user modes
  • Fully synthesizable
  • Static synchronous design

• Source code:
• VHDL Source Code or/and
• VERILOG Source Code or/and
• Encrypted, or plain text EDIF
• VHDL & VERILOG test bench environment
• Active-HDL automatic simulation macros
• ModelSim automatic simulation macros
• Tests with reference responses
• Technical documentation
• Installation notes
• HDL core specification
• Datasheet
• Synthesis scripts
• Example application
• Technical support