I am primarily looking for some several Z80 S-100 slave cards. Compupro use to sell Z80 slave s100 cards with 64K or 256K of ram and serial port and parallel port. I also understand a one time some use to make S-100 SBC that met all the S-100 spec. So they could run as Temporary Bus Masters (TBM). Thus enabling someone to put up to 16 of them on the same S-100 bus. If you have a few either type you want to sell, e-mail me Michael