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+ Index: s6ddrphy/spartan6_soft_phy.v
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+ ===================================================================
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+ --- s6ddrphy.orig/spartan6_soft_phy.v
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+ +++ s6ddrphy/spartan6_soft_phy.v
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+ @@ -116,7 +116,6 @@ module spartan6_soft_phy # (
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+ inout [NUM_DQ-1:0] sd_dq, // Data in from SDRAM device
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+ output [NUM_DQS-1:0] sd_dm, // Data mask to SDRAM devices
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+ inout [NUM_DQS-1:0] sd_dqs, // DQS
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+ - inout [NUM_DQS-1:0] sd_dqs_n, // complimentary DQS
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+
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+ // configuration ports
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+ input [2:0] cfg_al, // Posted CAS additive latency
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+ @@ -300,12 +299,11 @@ genvar j;
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+ generate
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+ for (j = 0; j < NUM_DQ/8*(NIBBLE_DEVICES+1) ; j = j + 1)
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+ begin:dqs_iob
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+ - IOBUFDS iobufds (
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+ + IOBUF iobufds (
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+ .O (sd_dqs_in[j]),
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+ .I (sd_dqs_out[j]),
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+ .T (sd_dqs_oe_n[j]),
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+ - .IO (sd_dqs[j]),
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+ - .IOB (sd_dqs_n[j])
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+ + .IO (sd_dqs[j])
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+ );
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+ end
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+ endgenerate
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