I'm back, but until I re-learn how to embed a URL or get around to copy/pasting my '''fritter return to the web announcement in the lounge, you folks are SOL on the full story.
http://www.applefritter.com/node/24063 turns out the url wasn't overly long anyway!
Be that as it may, the DuoDock riser is a "simple" NuBus riser card, the slot on the "MoBo" is NuBus NOT a PDS as the NuBus controllers are on the Dock's "MoBo." What makes it different than a straight through pinout extension like a PC AT riser and MAYBE the PCI risers on the 5XXX & 6XXX PowerMacs is that the glue circuitry providing for the two NuBus Slot Addresses are on the riser as opposed to the IIsi riser which contains the NuBus IC' as well as the slot address glue logic, likely for a single slot ONLY, IIRC, it's been a while gang! :
BTW, the Declaration ROM is specific to each dock, enabling whatever features any given dock has the circuitry to adapt from the '030 PDS. Luckily the NuBus bridge set does not rely upon any additional code on the DeclROM. The rest of the features that remain available are strickley passthru signals implemented on extra lines on the Docking Connector, IIRC.
DeclRoms for Docks I & II are a different package IIRC, and should not be interchangable AFAIK, the different features enabled MIGHT let you turn a Dock II into a less capable Dock I, but I tend to doubt it. DeclRoms from smaller docks probably won't help as swapouts for any other Docks as they only implement the features of their dedicated Docks, Mini or Micro.
glad to be back home again,
jt ;D
http://www.applefritter.com/node/24063 turns out the url wasn't overly long anyway!
Be that as it may, the DuoDock riser is a "simple" NuBus riser card, the slot on the "MoBo" is NuBus NOT a PDS as the NuBus controllers are on the Dock's "MoBo." What makes it different than a straight through pinout extension like a PC AT riser and MAYBE the PCI risers on the 5XXX & 6XXX PowerMacs is that the glue circuitry providing for the two NuBus Slot Addresses are on the riser as opposed to the IIsi riser which contains the NuBus IC' as well as the slot address glue logic, likely for a single slot ONLY, IIRC, it's been a while gang! :
BTW, the Declaration ROM is specific to each dock, enabling whatever features any given dock has the circuitry to adapt from the '030 PDS. Luckily the NuBus bridge set does not rely upon any additional code on the DeclROM. The rest of the features that remain available are strickley passthru signals implemented on extra lines on the Docking Connector, IIRC.
DeclRoms for Docks I & II are a different package IIRC, and should not be interchangable AFAIK, the different features enabled MIGHT let you turn a Dock II into a less capable Dock I, but I tend to doubt it. DeclRoms from smaller docks probably won't help as swapouts for any other Docks as they only implement the features of their dedicated Docks, Mini or Micro.
glad to be back home again,
jt ;D