SMI-80 paper tape reader outline What we need: Tape -The tape is made of paper -The tape has 8 horizontal segments to represent each bit of the I/O BUS -Each segment has [punched hole == 1] or [no hole == 0] -These bits stored on the paper tape represent instructuions or data 8 switches -Each switch exhists to read bits off of the paper tape -The switches will be aligned with each of the horizontal segments of the papertape to be read -The switch is normally activated in the closed position without a paper tape present -When a paper tape is present, the switch will not complete a circuit unless the paper tape is punched == 1 on the bit being read -Powering the circuit can start with a simple riscv board and progress as needed. Refer to the z80 manual for voltages required -Resistors are required for limiting current flow Debug / Breakout port -A debug port should be available to connect to with leads from an oscilloscope or directly to LEDs for interfacing with the machine -The debug port should not effect the functionality of the reader What would be nice: Shift registers -Shift registers would be nice to store bits from the last few reads for debugging, data collection, error tracing Full LED interface for Debug, current bits, and shift registers -An LED interface would be excellent to pair with a debug port, or shift registers for easily reading data that has been read