> > > 115200 bps is ~ 14 k/s. At that speed, a full 256Mb ram dump would > > > take approximately 5.2 hours.
http://en.wikipedia.org/wiki/UART lists speeds up to 2764800 bps. If we can use 2764800 bps that drops the time for 256 MiB to a tad less than 13 minutes. Does this require a magic UART? We'd definitely want one with a large FIFO. I assume we'd want a short, good quality cable. > > Or... assuming the case that the board under test locked up the machine, > > would it be possible to protect this RAM from being cleared on reboot, > > and then upload it to the test computer via PCI? > > Egad. We can supply external power, but I'm not sure if that would > send power to the host computer when it's off, causing trouble. Are we expecting to lock the machine up sufficiently that the reset and front panel power buttons don't work, requiring turning off the power supply (or pulling the power cord)? If not, the RAM could be powered from the 5V standby. Can we safely assume that the board under test will not screw up the PCI bus until we talk to the board? If there is really wierd stuff happening on the PCI bus, can the OGD ignore commands from the PCU bus and be controlled solely from the RS-232? _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
