such as the c 0 count on the line 202 decrementing signals corresponding to those found on the line 98 from the exclusive or gate 96 of fig1 a are supplied on the lines 204 to a multiplexer such as a multiplexer 206 which provide outputs that are 4 bits wide these outputs are supplied either on the line 207 or on the line 208 in accordance with the setting of the partition register 210 and under the control of the partition control 212 via the control line 213 if a fault occurs and the line 207 for example is selected to be active by the partition control 212 the signal on this line is coupled to a decrement counting section consisting of four separate decrement counters 214 which are coupled to the a weight storage control section 216 on the other hand if the line 208 is selected to be active the b weight section 218 which is controlled by the decrement counters 220 is employed in this manner alternate sets of weighted values may be selected by multiplexers such as the multiplexer 206 as associated with individual input data bits in the illustrated embodiment of fig2 the weight values stored in the weight storage sections 216 and 220 each comprise four sections a 0 a 3 and b 0 b 3 that are 6 bits wide therefore the output value signal supplied on the lines 222 and 224 is 24 bits wide the a weight values are supplied on the.