Recovering my Poly disk

Hi I've been hacking some code to recover data on Polymorphic disk. I been making goo progress but run into a couple of stumbling blocks. First I have both 8 inch disk and 5.25 inch disk to recover from. In the 5.25 disk, I had both single and double density disk. I had a single density controller on my Polymorphic 8813. I was able to read these disk images with that machine and firmware. I think I forgot to mention, all the disk are hard sectored. I got a double density controller card that I'm repairing now. I found code for the ROM on this card on one of my SSSD 5.25 disk. At first I thought the code was for the 5.25 because I saw a bunch of variables with 0Ah in them( the 5.25's are 10 sectored ). On looking at the code some more, I find that the code was really for 32 sectors. The 0Ah was for retries( Baaa ). I don't know if I have any double sided 8 inch drives. I bought a SA851 years ago but have no idea where it might be today. I'll look for it. Just in case, is there someone in the SF bay area with a SA851 that I might barrow. I'm not ready for it but hope to be in a few weeks or months( I'm still figuring out the code ). I may deside to work on the DSDD 5.25 disk first. I'll need to modify the code and make some mods to the controller ( crystal and a few timing caps ). It has a PLL to recover data but it is timed for the 8 inch rate. I'll need to slow it down for the 5.25s I have ( about 50 or so 5.25s ). The PLL looks easy to adjust. It has a feed back mode to keep the PLL running while not reading the disk. I should be able to use this to get it adjusted. It will require changes to the code as well. The 8inch are 32 hardsectored while the 5.25 are 10. I'm not sure about the sector data size but the 5.25 are most likely 512 or 256 for 10 sectored double density. Anyway this should be easy to determine( I just need to do a little math ). I do have a question. The board has a delay line to create the early and late signals for writing the bits. There are no numbers on it. Does anyone know the values used for early and late on double density 8 inch and on double density 5.25? Thanks Dwight _________________________________________________________________ The best games are on Xbox 360. Click here for a special offer on an Xbox 360 Console. http://www.xbox.com/en-US/hardware/wheretobuy/