In 関西弁（かんさいべん）, the way that the sentence ending particle な interacts with verbs is slightly different than in standard Japanese. Usually, な will appear after the dictionary form of verbs, to command/order that someone 'not do (A)'. However, in the Kansai region, な will be attached to the conjunctive form of verbs. The conjunctive form is also known as the ます form.
The meaning of な after these verbs will remain the same as in standard Japanese, commanding that something not be done.

• 勝手（かって）に黒板（こくばん）に絵（え）とかを描（か）くな。 (Standard)
  Don't draw things like a picture on the blackboard without permission.
• 勝手（かって）に黒板（こくばん）に絵（え）とかを描（か）きな。 (Kansai)
  Don't draw things like a picture on the blackboard without permission.
• 二十歳（はたち）になるまでお酒（さけ）を飲（の）みな。 (Standard)
  Don't drink alcohol until you are 20.
• 二十歳（はたち）になるまでお酒（さけ）を飲（の）みな。 (Kansai)
  Don't drink alcohol until you are 20.