It is used inside the DSP BUILDER where ALTERA do DDS module, you can download a EP1C20400 through SIGNAL TAP-line testing.

dds
...\.recurs
...\dds.ipx
...\dds.mdl
...\dds.mdlxml
...\dds_add.tcl
...\dds_dspbuilder
...\..............\db
...\..............\..\add_sub_phh.tdf
...\..............\..\altsyncram_0to3.tdf
...\..............\..\altsyncram_klm3.tdf
...\..............\..\alt_dspbuilder_AltiMult.vhd
...\..............\..\alt_dspbuilder_AROUND.vhd
...\..............\..\alt_dspbuilder_ASAT.vhd
...\..............\..\alt_dspbuilder_BEXT.vhd
...\..............\..\alt_dspbuilder_cast.jvgen_cache.xml
...\..............\..\alt_dspbuilder_cast.vhd
...\..............\..\alt_dspbuilder_cast_GN5WH3PQ4F.vhd
...\..............\..\alt_dspbuilder_cast_GNAGYZEKKI.vhd
...\..............\..\alt_dspbuilder_cast_GNAXEYG5HY.vhd
...\..............\..\alt_dspbuilder_cast_GNFJFXZEFI.vhd
...\..............\..\alt_dspbuilder_cast_GNLINZPODL.vhd
...\..............\..\alt_dspbuilder_cast_GNOAPP6YPC.vhd
...\..............\..\alt_dspbuilder_cast_GNSDNSTGJP.vhd
...\..............\..\alt_dspbuilder_cast_GNW7XSPXW5.vhd
...\..............\..\alt_dspbuilder_clock.jvgen_cache.xml
...\..............\..\alt_dspbuilder_clock.vhd
...\..............\..\alt_dspbuilder_clock_GNEX65AQCL.vhd
...\..............\..\alt_dspbuilder_clock_GNXPOFXHLB.vhd
...\..............\..\alt_dspbuilder_CST_MULT.vhd
...\..............\..\alt_dspbuilder_delay.jvgen_cache.xml
...\..............\..\alt_dspbuilder_delay.vhd
...\..............\..\alt_dspbuilder_delay_GNRLUKSFYF.vhd
...\..............\..\alt_dspbuilder_lut.jvgen_cache.xml
...\..............\..\alt_dspbuilder_lut.vhd
...\..............\..\alt_dspbuilder_lut_GNWETTACKG.hex
...\..............\..\alt_dspbuilder_lut_GNWETTACKG.vhd
...\..............\..\alt_dspbuilder_nBEXT.vhd
...\..............\..\alt_dspbuilder_parallel_adder.jvgen_cache.xml
...\..............\..\alt_dspbuilder_parallel_adder.vhd
...\..............\..\alt_dspbuilder_parallel_adder_GN5VY2YIOQ.vhd
...\..............\..\alt_dspbuilder_port.jvgen_cache.xml
...\..............\..\alt_dspbuilder_port.vhd
...\..............\..\alt_dspbuilder_port_GNBVKFPD6N.vhd
...\..............\..\alt_dspbuilder_port_GNKJ56WFJH.vhd
...\..............\..\alt_dspbuilder_port_GNOFVUOMJB.vhd
...\..............\..\alt_dspbuilder_port_GNRS4N7WI4.vhd
...\..............\..\alt_dspbuilder_port_GNWMFAXA5H.vhd
...\..............\..\alt_dspbuilder_port_GNXNCFUVYZ.vhd
...\..............\..\alt_dspbuilder_product.jvgen_cache.xml
...\..............\..\alt_dspbuilder_product.vhd
...\..............\..\alt_dspbuilder_product_GNQZTUDDSX.vhd
...\..............\..\alt_dspbuilder_SAdderSub.vhd
...\..............\..\alt_dspbuilder_sAltrBitPropagate.vhd
...\..............\..\alt_dspbuilder_sAltrPropagate.vhd
...\..............\..\alt_dspbuilder_SBF.vhd
...\..............\..\alt_dspbuilder_SDelay.vhd
...\..............\..\alt_dspbuilder_SInitDelay.vhd
...\..............\..\alt_dspbuilder_vecseq.vhd
...\..............\..\cntr_b2i.tdf
...\..............\..\cntr_cmi.tdf
...\..............\..\cntr_o3i.tdf
...\..............\..\cntr_qsi.tdf
...\..............\..\dds.asm.qmsg
...\..............\..\dds.autos_3e92b2e5d298f5cf757a393f7655ccd81.cmp.atm
...\..............\..\dds.autos_3e92b2e5d298f5cf757a393f7655ccd81.cmp.logdb
...\..............\..\dds.autos_3e92b2e5d298f5cf757a393f7655ccd81.map.atm
...\..............\..\dds.autos_3e92b2e5d298f5cf757a393f7655ccd81.map.logdb
...\..............\..\dds.cbx.xml
...\..............\..\dds.cmp.bpm
...\..............\..\dds.cmp.cdb
...\..............\..\dds.cmp.ecobp
...\..............\..\dds.cmp.hdb
...\..............\..\dds.cmp.logdb
...\..............\..\dds.cmp.rdb
...\..............\..\dds.cmp.tdb
...\..............\..\dds.cmp0.ddb
...\..............\..\dds.cmp_bb.cdb
...\..............\..\dds.cmp_bb.hdb
...\..............\..\dds.cmp_bb.logdb
...\..............\..\dds.cmp_bb.rcf
...\..............\..\dds.dbp
...\..............\..\dds.db_info
...\..............\..\dds.eco.cdb
...\..............\..\dds.fit.qmsg
...\..............\..\dds.hier_info
...\..............\..\dds.hif
...\..............\..\dds.jvgen_cache.xml
...\..............\..\dds.map.bpm
...\..............\..\dds.map.cdb
...\

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