If I recall correctly from Man & Machine, computers fall under the "big object" category to plant in cyberlimbs (or -skulls or -torsos) and thus are 5 ECU. Or 4. Big anyway.
And each ECU is, IIRC, about 50 cubic centimeters. So the entry for computer in the ECU table of M&M is 200-250cc, like a 5x5x8cm or 5x5x10cm brick, a 2060s desktop stuffed into the cyberlimb. Okay. (Well, it probably isn't a solid "brick," but it's 200-250cm of computer "stuff" wrapped around and through other limb components.)
So, my question: can you put a "wrist" computer into a cyberlimb? And if so, would it be .5 or 1 ECU?