| # | Line 143 | Line 143 | register int x; | |
|---|---|---|
| 143 | int s; | |
| 144 | { | |
| 145 | static int cerr[NCOLS][3]; | |
| 146 | < | static int err[3]; |
| 146 | > | static int err[3], errp[3]; |
| 147 | int b; | |
| 148 | register int a, ison; | |
| 149 | ||
| 150 | a = sub_add(s); /* use additive primary */ | |
| 151 | b = col[a]; | |
| 152 | + | errp[a] = err[a]; |
| 153 | err[a] += b + cerr[x][a]; | |
| 154 | ison = err[a] < 128; | |
| 155 | if (!ison) err[a] -= 256; | |
| 156 | < | cerr[x][a] = err[a] /= 2; |
| 156 | > | err[a] /= 3; |
| 157 | > | cerr[x][a] = err[a] + errp[a]; |
| 158 | return(ison); | |
| 159 | } | |
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