I dragged out the Mac II PowerCache adapter mcd donated to my project to check out before I buy, borrow or steal any of the other PowerCache adapters. I figure having the discrete control signals coming from 68020 and MMU sockets available for analyzing how they play out in the two PALs on board that particular adapter may tell me more that just jumping straight into the 68030 converters with integrated CPU/MMU signals. Dunno, it's worth a shot and an adapter on hand . . .
Long story short, it's likely the missing cache a/o /cache.hit control lines that are synthesized from other signals in the little black PAL boxen on the IIsi/SE/30 PowerCache Adapters. Not jumping to conclusions, but that's the bet bet from where I'm sitting.
Found a couple of pics over on 'fritter just now: NuBus Mafia
[attachment=1]iisi_pds_adapter-10199.jpg[/attachment]
[attachment=0]daystar_what-20222.jpg[/attachment]
....
Long story short, it's likely the missing cache a/o /cache.hit control lines that are synthesized from other signals in the little black PAL boxen on the IIsi/SE/30 PowerCache Adapters. Not jumping to conclusions, but that's the bet bet from where I'm sitting.
Found a couple of pics over on 'fritter just now: NuBus Mafia
[attachment=1]iisi_pds_adapter-10199.jpg[/attachment]
[attachment=0]daystar_what-20222.jpg[/attachment]
....