On Tue, Jun 21, 2011 at 12:03:10PM -0400, der Mouse wrote: > > Actually, I got the machine from a friend-of-a-friend who was a pretty > hardcore SCSI geek in a former life (he now repairs organs, the musical > kind). He would probably be the right person to ask about this; it's > not totally implausible he might even have source to the firmware (I > doubt he could release it to me if so, but he could look at it).
It's a 53c8xx: we load the "firmware" into it from our own driver. But it may have hardware restrictions we mismanage. Assuredly we've had that problem before. Count your blessings at least it's not a 53c810 (siop). That chip holds its own program in host RAM, so you have to contend with the whole usual set of DMA synchronization issues twice over. The 53c8[2679]x (esiop) have local RAM for the sequencer program; otherwise they're much the same as everything back to the 53c700, but that single change makes a big reliability and performance difference. -- Thor Lancelot Simon t...@panix.com "All of my opinions are consistent, but I cannot present them all at once." -Jean-Jacques Rousseau, On The Social Contract
