These files are some Forth source code for real time MIDI recording and play back with merge, transposition, and other file manipulations. The hardware interface was a homebrew design using a Z80-B UART. This programming ran real time with no mishandled characters on a 4.77 MHz PC.

• code.src in-line assembler interrupt service words.
  
• options.src file manipulation and other utility words.
  
• rtperf.src operator interface words.