The Audiogenic machine code Monitor is designed to allow the programmer to enter, modify and e x~m ine machine code on the VIC as simply as possible. The Audiogenic Monitor comes in two different forms - either as part of our BUT! Plus cartridge CVP052>, which is our programming aids cartridge comprising the Monitor, plus BUTI, our Basic toolkit ROM, plus 3K memory expansion, or as a cartridge containing the Monitor alone <VP074). The 17 Monitor commands, including assembler, disassembler and Centronics printer interface, are the same for both versions.