Timothy Miller wrote: > On 1/3/07, Daniel Rozsnyó <[EMAIL PROTECTED]> wrote: >> Patrick McNamara wrote: >> >>> Another option might be to make a daughter board with the appropriate >> >>> drivers and termination for a simple SCSI bus. Even a simple SCSI-1 >> >>> bus would allow for a full download in less than a minute, >> >>> uncompressed. >> >> Download to what though? Does that readily connect to a SCSI >> controller >> >> in the debugging workstation? Will that workstation have a SCSI >> >> controller? >> >> >> >> Lourens >> > >> > >> > I don't think it is at all unreasonable to use something like SCSI. >> Cheap SCSI cards can be had for $30US and if you really insist on >> using a laptop, you can find USB to SCSI adapters for around $60US. >> Something we need to keep in mind here. Debugging a PCI interface is >> not an "average hobbyist" task. Needing somewhat "specialized" >> hardware to accomplish it is not unrealistic. >> > >> >> If thinking this way then USB-to-IDE would be cheaper (<$10), enough >> fast (25MB/s +) and probably ATA is also simpler to implement than SCSI. >> >> I'd rather choose IDE, its quite universal - having PATA directly and >> you get also USB / FW / SATA with commercially available converters. > > I believe Tim Schmidt had suggested USB to serial that could do like 1 > megabit/sec on the serial line. I'm partial to that solution because > it's by far the simplest. The USB device is self-contained and > appears like a fully-functional USB device on the USB bus. Linux has > a driver for this that allows software to configure the bitrate on the > serial line. The chip is on the order of $7. > > The only thing that I don't know how to do (and I'm assuming this is > simple) is that I want to make sure we can identify that this serial > device is the one associated with our board, as opposed to some random > serial device. This just makes it easier for our tracer software to > figure out which serial device it wants to talk to. >
The card will send repeatedly "OGPHERE!" in idle (after reset / after timeout), the software opens all the serial ports it can and waits a while where does the identification string appear. The machine / OS don't care about the received text and we don't want to hurt other devices by sending requests out. Or you can implement PnP over serial port as the mices do :-) _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
