![]() ![]() I tried different floppys, but nothing change. The Write Protect circuit seems ok even before doing this modification on a drive (if I try to format a protected floppy the format process whas stopped instantly while if i use a not protected floppy the heads move, like in the VIDEO 3 FORMAT) I also bypassed the Write Protect circuit of one drive (suspecting something regarding this) installing a socket for the 74LS125IC, disconnecting the pin 3 of the 74LS125IC from the socket and keeping the pin on the socket down to ground, but nothing change. (Yes, there is a disk in the drive, but that is irrelevant since Windows does not turn the drive on at all. C:> From Explorer: Please insert a disk into A-Floppy (A:). Testing signals on the IWM all seems ok but when I'm trying to write an image using ADTPRO, with an oscilloscope I checked that the WRDATA PIN remain HIGH, while the WRREQ pin remain LOW (I supposed to see pulses on the WRDATA pin) and the floppy head remain fixed, so this is because the floppy is not formatted right? (See VIDEO 1 WRITE AN IMAGE) Symptoms From command-line: C:>dir a: The device is not ready. ![]() When i try to format a floppy, the head is moving to all surface, but at the end I get always "Check disk or drive door" (See VIDEO 2 FORMAT) if i using ADTPRO, while using the DOS loaded using ADTPRO i get the I/O error instantly (the head do not move). I also tried to load DOS using ADTPRO and execute the command INIT HELLO, without no success. I can read, but not write or format floppy (by using ADTPRO). Initially I suspected the problem was the drive, so I bought a new one but got the same behavior (Heads cleaned on each one). (To better understand the issue I attached 3 videos) Hi, I have a very strange problem with an Apple IIC. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |