Step 1. Install Star TSP100 Printer Drivers and go to Printer Utility.
https://drive.google.com/file/d/1TnX701b48RN3BIHrNVp4m0bvnSG1VRGD/view?usp=sharing
Step 2. Go to Printer Settings.
Step 3. Click on Code Page dropdown menu and select 437 (USA Std Europe).
Step 3. Click on store