MacroModel Reference Manual - ISP

Chapter 4: Operation CodesFFOP — Force Field OPtion selectionSpecifies alternative (ALT) selections that override those in the force field file. May be used, forexample, to select different Z0 atom definitions. See Appendix D for details. An FFOPcommand must come before an FFLD commandarg1arg2ALT numberThe alternative being selected in the force field file.ALT selectionNumber corresponding to the ASCII character defining the selection desired for thealternative given in arg1. The numbers corresponding to the various ASCII charactersare given in Table 4.1Table 4.1. ASCII to decimal number conversion table.Char Num Char Num Char Num Char Num Char Num) 41 = 61 Q 81 e 101 y 121* 42 > 62 R 82 f 102 z 122+ 43 ? 63 S 83 g 103 { 123, 44 @ 64 T 84 h 104 | 124- 45 A 65 U 85 i 105 } 125. 46 B 66 V 86 j 106 ~ 126/ 47 C 67 W 87 k 1070 48 D 68 X 88 l 1081 49 E 69 Y 89 m 1092 50 F 70 Z 90 n 1103 51 G 71 [ 91 o 1114 52 H 72 \ 92 p 1125 53 I 73 ] 93 q 1136 54 J 74 ^ 94 r 1147 55 K 75 _ 95 s 1158 56 L 76 ` 96 t 1169 57 M 77 a 97 u 11736MacroModel 9.7 Reference Manual