Curious that there's such a difference between the Daystar and the Mobius with the same CPU and speed in the Math and to a lesser extent the CPU tests. I wonder if the Mobius manages to operate with fewer wait states.

Click to expand...

Substitution of the Mobius with the MicroMac has enabled me to determine that the 128kB card of the MicroMac is the villain in the story. Under the same circumstances in which the Mobius performs faultlessly (now), although I am still not sure that the Mobius cache card is active, the MicroMac cache freezes startup immediately after the Carrera CP loads. Neither does TattleTech 'see' the cache. Removal of the MicroMac cache card restores normality. Inspection of the MicroMac cache card reveals corrosion on the pins of some ICs, but none is bridged, and the 'fuel-tank' electrolytics show no sign of bulging or leaking. However, a wash and a recap are now in the to-do list. Ideally, testing with a new cache would be the way to go, but where to find one now (apart from on the chimeric MicroMac website)?

Oh, hey. Are you using one of the newest revision Turbo040s with the big ASIC or the old style with all the little GALs on board?

Click to expand...

There is no forest of GAL chips. The complement is:

2 x Xilinx multipin (40?) with different type numbers

1 x GAL

4 x P53SJ

1 x 88196DW80

1 x AT17C65

2 x 51C9XXK

1 x P528A

and what I take to be an 80MHz oscillator.

de