SpinAsm

SpinAsm is a DSP development tool developed and distributed for free by Spin Semiconductor, the maker of the FV1 DSP chip used by the Z-DSP. With SpinAsm you can, develop and edit DSP effects for the Z-DSP. SpinAsm communicate with NumberZ over USB and lets you download your effects to blank cartridges or debug them with the Z-DSP module. SpinAsm is a windows software. It can also be setup to work on Mac computers using a virtual machine.
Everything about SpinAsm can be found here:

ZDSP Display Editor

ZDSP DE is a free tool developed by ITIJIK that lets you easily write edit and download the Z-DSP display text to your blank Z-DSP Cartridges. ZDSP DE is a windows software. It can also be setup to work on Mac computers using a virtual machine.

PICkit2

Microchip’s PICkit2 software allows you to write and download display text to your blank Z-DSP cartridges. This method is covered in NumberZ video manual. It is the old way of writing text to the Z-DSP cards. We recommend that you use the newer and easier to use Z-DSP DE software instead.

Text EEPROM Layout

Text Maker Excel File

Excel ASCII to Hex Macro