AST RESEARCH TECHNICAL BULLETIN TB-0233 10/07/86 3270 EXTENDED ATTRIBUTES The only AST product that supports 3270 extended attributes is the AST-PCOX with IRMA. To use extended attributes, AST-PCOX with IRMA must be configured to use a DMA channel. The PC must include a color monitor, not a monochrome monitor. Also, the 3274 or 3276 controller must be configured for a 3279 Model 2B terminal. Extended attributes allow the application to display up to seven colors, using extended character sets (special symbols), and a programming language called APL.