[doc] Update getting_started_fpga.md to specify the OpenOCD fork
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
diff --git a/doc/ug/getting_started_fpga.md b/doc/ug/getting_started_fpga.md
index 0cf013a..6e78dd8 100644
--- a/doc/ug/getting_started_fpga.md
+++ b/doc/ug/getting_started_fpga.md
@@ -151,6 +151,9 @@
$ /tools/openocd/bin/openocd -s util/openocd -f board/lowrisc-earlgrey-nexysvideo.cfg
```
+Note that you must use the [RISC-V fork of OpenOCD](https://github.com/riscv/riscv-openocd).
+See the [install instructions]({{< relref "install_instructions#openocd" >}}) for guidance on building OpenOCD.
+
To actually debug through OpenOCD, it must either be connected through telnet or GDB.
### Debug with OpenOCD
