Download This download package contains:

  • The circuit diagram
  • The memory dump for the EPROM
  • The source files of the SB-6668 V1.0 software
  • The source file and memory dump of original software for the PM-6668
  • A copy of the service manual of the PM-6668

Come to think of it, that's quite a treat, don't you agree.
The software must be programmed in a 27C256 EPROM and is supplied in the Intel Hex format.