Macintosh LC475 & Apple 7100 video card

[Dimitris1980]

Hello,

in my basement i have an Apple 7100 video card 1mb that it was connected in my Performa 6116 until i replaced it with the Apple 8100 video card with full 4mb. Can i connect the Apple 7100 video card on my Macintosh LC475?

 

[jessenator]

I don't believe so. I wondered what the compatibility between PDS/HPV versions are myself and did a little digging: the LC 475 uses the last vestige of the 68030 LCPDS slot, which I'm pretty sure is not compatible with the 68040 (and by extension 601) PDS slots from what I've read. PPC HPV/PDS video cards run at different speeds from the 030 LCPDS as well—the PPC cards are apparently linked to bus not CPU speeds.

 

[Cory5412]

The PowerPC Gen1 PDS video cards are completely incompatible with 68k Macs. Even if the connectors are the same.

 

[Trash80toHP_Mini]

.  .  .  the LC 475 uses the last vestige of the 68030 LCPDS slot, which I'm pretty sure is not compatible with the 68040 (and by extension 601) PDS slots from what I've read. PPC HPV/PDS video cards run at different speeds from the 030 LCPDS as well—the PPC cards are apparently linked to bus not CPU speeds.

IIRC, that's both right and wrong at the same time, AKA incomplete? Q605/LC476 do represent the last vestiges of the segmented LCIII 030 PDS implementation via a bridge. Quadra 630 introduced a new twist without the connector segmentation and full 96 pincount implemented. PPC iterations of the Q630 architecture also bridged to a full 96-pin 030 PDS.

Might have the switchover generation wrong?

7100 cards run at system clock and are entirely incompatible with previous systems including PPC variants of the Q630 architecture and 68k as C just said. Gen 1 NuBus PPC compatibility ONLY!

 

[Dimitris1980]

Thank you for the helpful answers.