On 8/4/17 05:49, systems_glitch via cctalk wrote: > Going with SLC/"industrial" Flash is indeed the key to avoiding random > failures. I have many deployed systems using industrial Flash modules (IDE > DOMs)
As Noel said, he initially talked using an IDE interface for the QSIC. I proposed SD cards to solve two problems. First is that we were worried about FPGA I/O pins. Since we've decided we'll have to go with a BGA part anyway, that problem has been dealt with (though we'd have to think about how to wire it into the prototype board we have). The second was the 5V/3.3V issue. Obviously that's fixable, we had to do so for the QBUS interface, but it's always easier to not. Dave Conroy told me about using these industrial flash IDE modules on his PDP-10/x and running them on 3.3V. That's great except it does nothing for the people who want to run their old stock of IDE disks. So my question is: do industrial SD cards exist? I don't think I'm up to going with a higher-end FPGA and trying to implement SATA even though in many ways I think that's the right answer. If there's a SATA PHY chip, that's a maybe. Dave
