P164: Difference between revisions

The P164 is a video effects unit and framestore.

The P164 doesn't seem to be talking with its front panel - The Panel doesn't seem to know the machine isn't listening. I think we can conclude then, that there is little to no handshaking and verification going on

The Panel continues as if everything were fully functional, but after boot, the machine just stays on the last test panel. Juding by the speed at which the test frames are being wrote to the frame RAM, the machine is running in "18 mode", despite it being a 38PXB model. In 18 mode, that machine bypasses a particular card, although it isn't known which. For line repetitive test cards, the CPU writes 1 line, which is (in 38 mode) then copied off to all lines in the stores. In 18 mode, this copying doesn't happen (on said board), so the CPU has to write everything again and again to the stores which make everything noticably slower (~1/2 a sec per card, rather than almost instant). Hence why I think it's in 18 mode...