4000A (250-5000A) Settings Faxback Doc. # 1462 * Denotes user changeable options. Caution: Some of these jumper options should NEVER be changed, DO NOT tell a customer to change a jumper unless you know the purpose of that jumper setting. Monitor Type* E1-E2 ON selects color video option OFF selects monochrome video option FDC Select* E5-E6 Enables primary address for FDC (standard) E6-E7 Enables secondary address for FDC Co-Processor* E3-E4 ON coprocessor installed OFF no coprocessor installed (/tmc-05/01/95)