reintom@rocky2.UUCP (Tom Reingold) (07/07/86)
A little while back, I asked for help in setting ECHO to OFF as the default in batch files. I use Zenith's MS-DOS, not IBM's PC-DOS. I don't know what version of PC-DOS my version corresponds to. When I type "ver", I get IO.SYS Version 3.05 MS-DOS Version 3.10 I am posting my finding for anyone else who is looking for what I needed. With the suggestion from nasser@ucbvax.Berkley.EDU, I looked for all values of 01 between offsets 1900 and 1cff. I found ten of them and, one by one, changed them to 00 and tried each copy to see the effect. Upon the third try, I found that changing 01 to 00 at offset 1987, ECHO was OFF in batch files unless it was turned ON with an "echo on" statement. He also said that he had to do the same at offset 1b1c for his version, which I think was PC-DOS version 3.2. This is a catch-as-catch-can method for making these changes and I have no idea how people can do so much by reading values in an executable file, but I am pleased and impressed anyway. Tom Reingold