Midi Split Control

The MIDI SPLIT facility dis- cussed is actually only a sub- routine from a purposely de- veloped MIDI control program written to run on a 6502-based microcomputer. As a source listing is given as part of this article, the MIDI SPLIT routine can be studied in detail by pro- grammers whose micro allows them to write object code direct into the memory, or through an assembler. The computer should be equipped with a Type 6850 ACIA (Asyn- chronous Communications Interface Adaptor) pro- grammed to send and receive MIDI data at the standard baud- rate of 31.25 K. For the ACIA to operate at this data transfer rate, its clock input must be 500 kHz. A MIDI interface must, of course, be fitted at the serial I/O port of the computer. The proposed machine language program resides in less than two pages of RAM, and may need a patch here and there to make it run on a par- ticular system. An easily writ- ten BASIC program could be added to read the desired SPLIT POINTS. Provided you are sufficien...