Thanks for your reply and some of the suggestions of cause. However, this Daystar adapter does have a NuBus pass-thru slot, it is not PDS, I have included a photo to show the adapter. Daystar made two kinds of these for the IIsi, one had a PDS pass-thru and one had a NuBus pass-thru slot. I have also included a pic of the page from the Daystar adapter user's manual that shows this.
I have looked in the Daystar book and haven't found anything about current draw. I know you are right, there must be a limit, and I guess I'll have to assume I've reached it. It's sad though, because I'd like to be able to put the computer online and have the accelerator running, but I suppose I'll have to choose between the two.
I have another IIsi that has one of the MacCon ethernet boards in it that runs fine, I really don't want to try to put these boards in there and run the risk of blowing out - yet another - logic board. That would simply be too depressing and I don't have the money to keep buying IIsi's and/or logic boards.
Has anyone heard of a hard drive pulling too much power and blowing out a logic board? I have spoken to two knowledgeable Mac folk, who have been servicing and/or selling Mac parts for years and neither has heard of such a thing, but then they haven't seen everything.
The three boards, with the ethernet NuBus board at top, the '040 card in the middle and the adapter on the bottom:
The page from the Daystar user's manual showing the availability of a PDS or a NuBus pass-thru slot for the IIsi:
A close up of the Daystar adapter, with the NuBus pass-thru slot at the top and the PDS slot (for the '040 adapter) in the middle (note that the PDS slot in the middle matches the PDS connector at the bottom which connects to the computer):
I have looked in the Daystar book and haven't found anything about current draw. I know you are right, there must be a limit, and I guess I'll have to assume I've reached it. It's sad though, because I'd like to be able to put the computer online and have the accelerator running, but I suppose I'll have to choose between the two.
I have another IIsi that has one of the MacCon ethernet boards in it that runs fine, I really don't want to try to put these boards in there and run the risk of blowing out - yet another - logic board. That would simply be too depressing and I don't have the money to keep buying IIsi's and/or logic boards.
Has anyone heard of a hard drive pulling too much power and blowing out a logic board? I have spoken to two knowledgeable Mac folk, who have been servicing and/or selling Mac parts for years and neither has heard of such a thing, but then they haven't seen everything.
The three boards, with the ethernet NuBus board at top, the '040 card in the middle and the adapter on the bottom:
The page from the Daystar user's manual showing the availability of a PDS or a NuBus pass-thru slot for the IIsi:
A close up of the Daystar adapter, with the NuBus pass-thru slot at the top and the PDS slot (for the '040 adapter) in the middle (note that the PDS slot in the middle matches the PDS connector at the bottom which connects to the computer):