On 31 Jul 2007 at 14:36, Ethan Dicks wrote:
Hmm... A real IMSAI is what, 10.5" tall, 19"
wide, and about 24"-36"
deep? That sounds difficult to reproduce at 1/12th scale, but it
might be possible to replicate an IMSAI front panel with fiber optics,
run them under the floor of the doll house to a hidden Z-80 board
(that could still be done with a lot of SMT to make it small).
Golly, the microprocessors they're coming out with nowadays would be
pretty much to scale on a chip basis. Consider, for example, the ST
ST/7 MPUs in TFBGA packaging--what, 4mm square? With an instruction
set similar to a 6502, you should come close to building a KIM-1 to
scale--if only you could find a small-enough display and keypad...
Instead of doing a PDP-8 on an FPGA, you might as well emulate one in
software on one of the available MCUs. Think of what you could do
with, say, a Parallax Propeller or even one of the ARM9 chips...