> From: Glen Slick > You should also hang out at vcfed forum in addition to hanging out here.
I barely have time to keep up with the things I'm already into (actually, strike that - I _don't_ have time to keep up already :-)! So I'm going to have to pass. Interesting about the FP11 stuff, though. I wonder, however, if those 11/20 mentions are more aspirational, rather than something that was actually done, and later dropped? I say this knowing a modest amount about how the KA11 CPU in the 11/20 works, and a bit about how the FP11-B interfaces to the host CPU. For one thing, it would take some modifications to the KA11 to recognize floating point instructions, so that it can wake up the FP11-B to handle them. But that turns out to be the easy part; it would take further mods to the KA11 because the FP11-B expects the host CPU to do data fetches, etc on its behalf. (See Figure 2-3 in the FP11-B MainManual.) This latter function can't be off-loaded onto a separate interface unit, as it needs access to register contents held in the CPU. I don't have the time to look into this further, but if someone is interested they'd need to study the FP11<->CPU interface, and in particular look at how the KB11 supports memory operations requested by the FP11-B - I wouldn't be suprised if there's some microcode in the KB11 to support those memory operations. Noel