fpga: explicitly encode instance index for virtual JTAG
[ci skip]
@@ -271,6 +271,8 @@ module de2_115_top(
`ifdef VENDOR_ALTERA
// Altera's virtual JTAG megafunction.
sld_virtual_jtag #(
+ .sld_auto_instance_index("NO"),
+ .sld_instance_index(0),
.sld_ir_width(4)
)virtual_jtag(
.tdo(jtag.tdo),
