That is what I thought and what I experienced when I tried SE/30 + Asante + Daystar IIsi adapter & 040 Accelerator + Micron Xceed. I tried it once and trusted what Gamba said,The firmware on the Micron is not compatible with 040 CPUs. This still applies today as it did in the good old Gamba days
Did you happen to try:As said I decided to make a tall version as well because the IIsi Pivot can not be made to work together nicely with the Turbo040. There seems to be a timing issue that does not occur when the PowerCache is used instead of the turbo.
Problem also does not occur when the two PDS cards are connected directly to each other.
So:
MacCon->IIsi Pivot->adapter+Turbo040 = works
IIsi Pivot->MacCon->adapter+Turbo040 = works
adapter+Turbo040->IIsi Pivot->MacCon = works
adapter+Turbo040->MacCon->IIsi Pivot = works
MacCon->adapter+Turbo040->IIsi Pivot = does not work
The GAL is buffering the clock signal and introduces a really small delay which seems to be enough to throw things off for the Turbo040 as it seems to be operating on a tighter timing than the PowerCache.
And even though this...
View attachment 20865
...might look funny it is not actually useful
The IIsi Pivot and MacCon will still fit nicely on top of that, so no problem if you do not need to run big cards like the XCeed....
I figured that this had been checked, thanks much for confirming!The Micron and 040 do not work together in any possible combination.
It hangs on a gray screen when initializing the Micron no matter if the internal or an external screen is used.
We're not talking about the same thing, I should have said "CPUCLK"The accelerators CPU clock is not present on the PDS connector. Everything on the PDS is synced to the 16MHz clock.
CPUCLK and C16M are the same and connected to each other already on the SE/30 logicboard.On your adapter, cut the Passthru's trace to A38 (CPUCLK) and jumper it to the C38 (C16M) 16MHZ reference signal that's used to get SE/30 cards to work on the IIsi's 20MHz PDS.
Bump ;-)User GeekDot engaged on this quest and delivered 2 revs to the Carrera CP, neither of which worked. Our thinking was that the init needed to be patched too. Problem is that in one of these posts there was much discussion (spring/summer of 2017) and possible direction appears to have been lost in the site upgrade. Both of us have asks into the Admins to see if the missing posts can be recovered...
I second the ask on recovering that thread as I just sorted out how I might this all jammed inside my SE/30 in this thread: My PDS Extension Cable...DONEBump ;-)
While cory and bunsen seem to have read my plea for reactivating the mentioned thread, it's still dead, Dodo, vanished, Kaputt... :'-(
It was sort of documentation so it's heavily missed.
The previous URL was https://68kmla.org/forums/index.php?/topic/21280-se40-grayscale-need-help-with-a-carrera-hack/?p=330470
Thanks for helping & cheers,
Axel