Based on specs in https://www.cnet.com/products/ibm-thinkpad-t2 … d-series/specs/ my T21 has one of those S3 savage/IX chips.
Based on this compatibility chart https://gona.mactar.hu/DOS_TESTS/ those chips are suppose to have problems in dos where every 5th line is doubled.
After installing dos, I have tested multiple games that are on the chart, but there just isn't any lines doubled.
Are there version of the chip that don't have that problem or is there a chance my thinkpad would have some other chip?