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# Copyright 2013, Sinclair R.F., Inc.

# Test bench for synthesis tools:  simple LED flasher

#

# Performance

#   Xilinx XC3S50A-4

#     ISE-11.4   8.102 ns       123.4 MHz

#     ISE-12.4   8.165 ns       122.5 MHz

#     ISE-13.3   8.074 ns       123.3 MHz

#     ISE-14.4   8.127 ns       123.0 MHz

#   Xilinx XC3S50A-5

#     ISE-11.4   6.757 ns       148.0 MHz

#     ISE-12.4   6.771 ns       147.7 MHz

#     ISE-13.3   6.744 ns       148.3 MHz

#     ISE-14.4   6.773 ns       147.6 MHz

#   Xilinx XC6SLX4L

#     ISE-11.4   9.112 ns       109.7 MHz

#     ISE-12.4   9.434 ns       106.0 MHz

#     ISE-13.3   9.657 ns       103.6 MHz

#     ISE-14.4   9.657 ns       103.6 MHz

#   Xilinx XC6SLX4-2

#     ISE-11.4   7.948 ns       125.8 MHz

#     ISE-12.4   7.544 ns       132.6 MHz

#     ISE-13.3   5.682 ns       176.0 MHz

#     ISE-14.4   5.682 ns       176.0 MHz

#   Xilinx XC6SLX4-3

#     ISE-11.4   5.700 ns       175.4 MHz

#     ISE-12.4   5.064 ns       197.5 MHz

#     ISE-13.3   5.000 ns       200.0 MHz

#     ISE-14.4   5.000 ns       200.0 MHz

#

# Minimum Logic utilization

#   Xilinx      XC3S50A         130 Slices, 231 4-input LUTS

#   Xilinx      XC6SLX4          35 Slices, 119 Slice LUTs

ARCHITECTURE core/9x8 Verilog

INSTRUCTION     1024

RETURN_STACK    16

DATA_STACK      16

OUTPORT 1-bit o_led O_LED

ASSEMBLY        uc_led.s