The Radio Information Board

I recently purchased a Maxon SM4450 and SM6450 on ebay. They need to be programmed, and I can't justify the cost of purchasing the necessary hardware and software for one time use. Does anyone have schematics and cable pinouts for the hardware adapters, and know where the programming software can b...

Have you try holding down shift? I have lost my cable for my sm-6000 do you know ware I can pick one up. (Have look all over the internet.) Or even a pin out would be nice!