[cctalk] Re: Help? Programming SCM90448 EPROMs

Gents, please be aware of the WSI 57C49 Eprom, 8Kx8 in a 24 pin DIP It can go low as 25nS access time. Note that addresslines A10,A11 and A12 are swapped, so the contents needs to be moved accordingly. I used the C program below to create replacements for some Tektronix 4052 ROMS Jos #include <stdio.h> #include <stdlib.h> /*  * radapt <rominage>  *  * quick hack to transpose rom inages from mk36000 to wsi57c49  * These are pincombatible except for A10, A11 and A12  *  */ #define        K8 8192 #define        K1 1024 unsigned char in[K8], out[K8]; void move(int a, int b) { int i; printf("%d %d\n",a,b); for (i=0;i<K1;i++)  out[b*K1+i]=in[a*K1+i]; } int main(int argc,char *argv[]) {   int i=0;   int c;   FILE *fptr;   fptr=fopen(argv[1],"rb");     { if (!fptr)            printf("Unable to open file %s\n",argv[1]);           else       { while( (c=fgetc(fptr)) !=EOF )           { in[i]=c; i++;}         fclose(fptr);         if (i!=K8)             {  printf("incorrect input file size, must be %d, not %d\n",K8,i);                exit(-1); }             move(0,0);             move(1,2);             move(2,4);             move(3,6);             move(4,1);             move(5,3);             move(6,5);             move(7,7);             fptr=fopen("out.bin","w");             for (i=0;i<K8;i++)               fputc(out[i],fptr);             fclose(fptr);        printf("Output file out.bin written\nmv out.bin %s\n",argv[1]);     };   }; }