Unfortunately I couldn't find neither the MC with all my programs on it nor the Walkman to play back all that data.
So there it was - the idea to use my Arduino 'playing' some machine code source files while the Micro-Professor is 'listening' on its tape reader interface!
|Arduino Mega 2560|
The tape file format is described in the MPF-1 Manual as shown here:
So, there are some tones to be generated. To be exact, there is a 2kHz and a 1kHz tone, sequenced according the file, byte and bit formats described as seen above in Fig. 4-7.
The Arduino Sketch is the first prototype implementation of a Micro-Professor Tape File Generator.
The Arduino Sketch defines Pin 12 to be the audio output which has to be connected to the MPF-1 EAR audio input jack (also connect Arduino GND to MPF-1 GND).
The following schematic depicts how a stereo mini jack wiring shall be prepared: