----- Original Message -----
Sent: Wednesday, November 21, 2001 12:04
Subject: DMA transfer problem
I am having a hard time getting my DMA transfers
to run at a reasonable speed.
I have a GT64120A chip on my CPCI board that is
attempting to transfer data
to the CPU's DRAM. The problem is that about half
the time it does a burst
transfer, and the other half of the time, it
receives TargetDisconects and retries
the transfer until it finally gets it
I tried with several CPUs: MOTOROLA, Triems, they all seem to do the same.
I do not have (obviously) much experience
mastering the bus, so am asking for help from the experts.
Any idea why this is happening, and what could be
done to alleviate the problem?
I do have a state/waveform - diagram available by
Instruments (p) 310-515-5330
1234 Francisco St, Torrance,