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"Name of user not set <joshua.n...@skyworksinc.com>" just uploaded a new patch 
set to Gerrit, which you can find at https://review.openocd.org/c/openocd/+/7881

-- gerrit

commit 68eb318d9d9a0240f7e1a4b4b8e2ca7858a5e3dd
Author: Joshua Nekl <joshua.n...@skyworksinc.com>
Date:   Fri Sep 1 16:29:33 2023 -0700

    tcl/interface/ftdi: Add documentation for HS2
    
    Change-Id: I75d6aa0292bf7ff4ebee8752a5e7a3516500cd04
    Signed-off-by: Joshua Nekl <joshua.n...@skyworksinc.com>

diff --git a/tcl/interface/ftdi/digilent-hs2.cfg 
b/tcl/interface/ftdi/digilent-hs2.cfg
index 9501c4ad4a..89c9e4b6c4 100644
--- a/tcl/interface/ftdi/digilent-hs2.cfg
+++ b/tcl/interface/ftdi/digilent-hs2.cfg
@@ -2,6 +2,10 @@
 
 # this supports JTAG-HS2 (and apparently Nexys4 as well)
 
+# ADBUS5 controls TMS tri-state buffer enable
+# ACBUS6=SEL_TMS controls mux to TMS output buffer: 0=TMS 1=TDI
+# ACBUS5=SEL_TDO controls mux to TDO input: 0=TDO 1=TMS
+
 adapter driver ftdi
 ftdi device_desc "Digilent Adept USB Device"
 ftdi vid_pid 0x0403 0x6014

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