Hi -- Having doctored up one faulty drive and replaced the other, my TRS80 Model 3 is now ready for action. It fires right up and will boot several different Model 3 OSes. The documentation I received with the unit contains a lot of detail, but it does not describe all of the i/o connectors on the rear of the unit. The ones which I can identify from the docs are a female DIN connector for tape i/o and a female DB25 for serial i/o. The docs also describe the parallel port as a 34-pin card-edge connector (which I suppose needs a Tandy-specific cable to attach to a printer), but the problem is that there are *two* of these 34-pin connectors on the rear of the system, as well as a 50-pin card-edge connector. Can anyone familiar with this system help me out with details regarding these connectors? TIA -- Glen 0/0 If I am not for myself, who will be for me? And if not now, when? -- Pirkei Avot