Project https://atariage.com/forums/topic/304361-tipi-in-a-speech-synthesizer-housing/#comments

This is a special board mixing the 32k memory expansion and TIPI in a single board that fits inside the TI speech synth case.

This is designed for use with a PI Zero as it will fit inside the case as well.

For more info on TIPI and how it works see this article: https://www.arcadeshopper.com/wp/?p=297

TIPI WIKI: https://github.com/jedimatt42/tipi/wiki

TIPI COMBO WIKI: https://github.com/jgparker/tipi/wiki

NOTE: if you are trying to use this as just 32k, and not use TIPI/Hook up a PI, ANY access to DSK1-4 will cause the TIPI to wait for a response from the pi. And since you don't have one, it will never respond. To work around this, with the board disconnected from power, remove the DSR rom chip from the board and it will function as just 32k.