DR11-K Interface

This manual provides a detailed guide for the DR11-K interface, a hardware module designed for the PDP-11 Unibus. Key topics include:

• Functional Overview: Description of the address selection logic, interrupt control logic, and device interface logic.
• Software Interface: Details on the status, input, and output registers, including register bit assignments and programming examples for input and output transfers.
• Electrical & Mechanical Specs: Specifications for TTL-compatible I/O, power requirements, and mounting in a standard SPC slot.
• Installation & Configuration: Procedures for configuring jumpers and microswitches to define input data paths, interrupt modes, device addresses, and vector addresses.
• Maintenance: Instructions for testing the interface using the provided maintenance cable to link input and output for diagnostic purposes.
• Applications: Examples of interfacing with various devices, including a specific guide for connecting to a Coulter Model "S" Blood Counter.