I found the first TechNote vote for clocking the Portable down to 8MHz. The Video accesses to MoBo RAM as frame buffer could be a potential sticking point.
This is fun, I've never studied the 68000's signals or a PDS connected to Vampire Video frame buffering outside the IIsi, which was never really an issue for me. I've always intended to use the Radius Color Pivot II/IIsi to leave Bank 1 unmolested in the SuperIIsi™ hack. I've spent a lot of time exploring the various permutations of the bridged '030 bus in PowerBooks and Quadras 605/630, so I find the SE/Portable PDS intriguing.
Looks like I'll need to build a wire wrap or etched extender board from Portable EuroDin to 68000 socket. ;D
This is fun, I've never studied the 68000's signals or a PDS connected to Vampire Video frame buffering outside the IIsi, which was never really an issue for me. I've always intended to use the Radius Color Pivot II/IIsi to leave Bank 1 unmolested in the SuperIIsi™ hack. I've spent a lot of time exploring the various permutations of the bridged '030 bus in PowerBooks and Quadras 605/630, so I find the SE/Portable PDS intriguing.
Looks like I'll need to build a wire wrap or etched extender board from Portable EuroDin to 68000 socket. ;D