# Running TRCFGC.EXE using the command line

- To run the command-line configuration program (`TRCFGC.EXE`) using command-line options, boot your computer, and at the DOS prompt, type: `TRCFGC`

- Each command line must begin with the TRCFGC command, followed by the /IO= option, which specifies the I/O location of the Ringnode you intend to configure. You must specify the I/O location. For example:
  `TRCFGC /IO=0A20 /8_BIT` sets the Ringnode located at 0A20 to 8-bit mode.

- You can enter more than one command-line option at a time. For example:
  `TRCFGC /IO=0A20 /4MBITS /OTHER` sets the Ringnode to a ring speed of 4Mbps and to alternate ("OTHER") bus-timing mode.