Questions about Central Point Deluxe Option board

On Thu, 27 Jun 2002, Tony Duell wrote: You're absolutely right, of course. DISKCOPY was merely an example, since the premise of the bet was making a disk that DISKCOPY could make a working copy of, but that the option board could not. And, as you said, a no index diskette will cause the Teac drives to choke on any type of read attempt. The point was that the OEM 5150 drives (Tandon TM100-2), could read and write without index. Therefore, since the option board software needed index, it was possible to create a disk that could be accessed without the option board, but not with it. Presence of the option board did not interfere with the "normal" disk I/O. We used to have to block the index for reading and writing some disk formats on the PC. For example, some TRS-80 formats, and even some Kaypro formats, start their first sector too close to the index for comfortable reading with a 765. We were able to do them, by just putting a piece of opaque tape over the index hole. But with Teac drives (55B), blocking the index kept the drive from functioning. For those, we would just interrupt that wire in the cable, so that the index was seen by the drive, but not by the FDC. -- Fred Cisin cisin(a)xenosoft.com XenoSoft http://www.xenosoft.com PO Box 1236 (510) 558-9366 Berkeley, CA 94701-1236