[morio]

The short answer is yes. The long answer is that most of the VideoToaster software and hardware were specifically designed for the Amiga hardware architecture and therefore did not easily port to other systems. The extension card was Zorro II and the performance critical software was written in 68k assembly. In some cases the assembly code is written in such a way that it depends on cycle exact sync with the video signal. Original source code is on github.com, search for OpenVideoToaster.

[ChainOfFools]

If I recall correctly the original video toaster, and I believe even the revised toaster 2000 and 4000 all occupied the video slot, a dedicated internal interface that provided direct access to analog RGB component signals as well as some other video timing and audio channels. There was no connection to the Zoro II or later Zorro III system buses. The Amiga 4000 video slot added digital rgb counterparts to these analog signals, and also some oddball 8 bit connections to,I believe the parallel port UART pins.

[sillywalk]

Awesome, I didn't know this!

"In 2004 the Amiga version of the Video Toaster® went "Open Source", thanks to NewTek, DiscreetFX, Bill Evans, Aaron Ruchetta and a few others. "