The XAPP directory contains designs files that support the XAPP Application 
Notes found in Section 8 of the Xilinx Data Book. Sub-directories exist for 
the Application Notes listed below. Directory names are the XAPP number with a 
"V" suffix to indicate the use of Viewlogic, eg., XAPP001V.

XAPP 001        High-Speed Synchronous Prescaled Counter
XAPP 002        Simple, Loadable, Up/Down Counter
XAPP 003        Synchronous Presettable Counter
XAPP 004        Loadable Binary Counters
XAPP 005        Register-based FIFO
XAPP 007        Boundary Scan Emulator for XC3000
XAPP 009        Harmonic Frequency Synthesizer and FSK Modulator
XAPP 014        Ultra-Fast Synchronous Counters
XAPP 021        Dual-Prescaled Presettable Counter
XAPP 022        Adders, Subtracters and Accumulators in XC3000
XAPP 023        Accelerating Loadable Counters in XC4000 
XAPP 026        Multiplexers and Barrel Shifters in XC3000/XC3100
XAPP 028        Frequency/Phase Comparator for Phase-Locked Loops
XAPP 029        Serial Code Conversion between BCD and Binary

