microVax II memory question

Thanks Josh. If it's just physical (ie. just need a longer cable) that could be easily done. Nowhere is it stated what the max. length of this cable is, but seeing how it carries the 32 bit data lines, it should be as short possible. In the enclosure the second and third slots are for memory, so it should be able to be at least as long as from the third slot to the CPU board. That might give enough slack to account for the different position of the 50 pin header. The KA630 manual seems to imply that the max. amount of RAM is capped at 9M (1M onboard + 2x4M cards), yet DEC 8M cards are available. Can two 8M cards safely be put in the BA23 for a total of 17M? -- alex ----- Original Message ----- From: "Josh Dersch" <derschjo at gmail.com> I seem to recall that the physical positioning of the 50-pin headers on the KA650 and KA630 module (and their associated memory boards) are different, so it's physically difficult to connect mismatched boards (without rigging up a different cable). However, it's been awhile since I've fooled with this. Based on this I'd wager that they're incompatible but I can't say I have conclusive data/experience to back this up. (Compare the images at: http://hampage.hu/dr/kepek/ka650.jpg vs. http://hampage.hu/dr/kepek/ka630.jpg -- the positioning of the 50-pin header - Josh