#A2000 Rev 6.x bugs!!!
06-Oct-89 20:26:54
Sb: #68429-#A2000 Rev 6.x bugs!!!
Fm: Rick Moyer 71301,224
To: David Martin 73617,1620
Well, I've been following a thread on the "other" network for some time about
this problem.
There is indeed a problem with :some:, note I said :some:, not all, revision
6. 0-6.1 motherboards. The problem can manifest itself with some rev.6.0-6.1
boards and not others. But, in almost all cases, the problem is associated with
just about -any- type of DMA activity on the bus, not just the 8-up! board.
C='s own cntroller cards have occasionally failed, as have the bridgeboards,
and several other 3rd party cards. After calling around the country to several
dealers, and manufacturers, they've all stated that they've had problems, some
more than others. Microbotics, however, does seem to be experiencing the
highest failure rates of anyone,(according to inside sources at CATS),
therefore C= has'nt -officially- announced there is a problem, and for the
moment, they seem to think this -may- be more of a Microbotics problem than a
Commodore problem.
Microbotics has sent West Chester several of there cards from their product
line for testing and nothing conclusive has resulted as of yet,(or at least
that I know of…) I took my rev.6.1 board to GVP and tried one of their
hardcards after experiencing problems with an HF2000/Qunatum hardcard, and
GVP's worked flawlessly, even withn 8-UP! ram eaxpansion in the next slot. It
turned out that I had a defective HardFrame, and my problem was not 6.1
related.
Two of the engineers at GVP informed me that they too have some problems, with
6.0-6.1 revisions, but only occasionally, and nowhere near the degree some
other manufacturers, most noticably Microbotics, have had. This -may- be due to
the fact that the GVP SCSI controller is not a fully DMA type controller,(It is
DMA up until the on-board 16k ram cache, but their card never takes control of
the DMA channel).
I've been talking to Joanne Dow about this problem, also, and she is
supposedly keeping close tabs on this as well. If I hear any more from her
about this, I'llpost it here.
Anyway, I've been running my 6.1 revision 2000 for 5 weeks now, with a GVP/
Quantum prodrive105s hardcard and an 8-UP! board, populated with 4 megs, with