H-89....

Hi Gene I don't have a way to copy stuff easily but I do have some manuals and docs. I bought a H-89 when they first came out. After the 2K for the machine, I was too straped to buy the OS. I hand disassembled the H-17 ROM and figured how to read and write to the floppy. I took a 8080 listing for a FIG Forth and put that on it with my disk interface code. In any case I have a Forth that will boot stand alone. Ofer the years I aquired the OS and some other software. I descovered that the way Heath kit was using the disk was real bad because it required a revolution of the disk for each consecutive sector. In my Forth, I wrote a format routine that would pick up a track and rewrite it with interleaving of the sectors. It made enormous differences in the operation of the hard sectored software. I'll try to dig this stuff up. I'll try to give you a list of the docs and such that I have as well. Maybe someone local can scan stuff that that I don't have the time to deal with. ( I live in Santa Cruz Ca. ). Later Dwight PS I also modified my H-89 by mount two half height drives in the single slot ( it did require a little filing of the plastic ).