Hi, Having read though the excellent paper by PHK about interrupt latency in the FreeBSD kernel, I got intrested, and decided I want to build a very similar solution. I have a GPS disciplined OCXO (it's some strange Lucent based product, I'm not entirely sure it's OCXO, but I atleast think it is), and a Motorola Oncore providing 1PPS to the machine (the computer), and to the XRPU device. Now, I tried to look for the HOT1 device from Virtual Computer Corporation, of even the HOT-II, but they seem to be non functioning anymore. I was wondering, does anybody have a card to suggest to use (I'd prefer Xilinx Spartan FPGA base product, because that's the only FPGA I know howto program) as the time stamper for the kernel? I've tried to search for a few weeks on Google to no avail, only finding solutions that are far from the requirements I have towards the system in general. Basically, I want to do the same as PHK did, i.e. control the card with a 10MHz signal form a GPS discplined frewquency standard, and then feed the XRPU device with another 1PPS signal, and the computer too. The requirements would be rather to have a 32-bit PCI device. Has anyone built this kind of device from something else than the VCC HOT1 FPGA board? Is there some directly competing product that I should know about, or something like that?
warm regards, and have a happy new year, Bo Granlund _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
