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The first thing you have to do in any design engineering task is to establish the requirements. DOes anyone have any? If not, I'd go for a small board, small enough to fit in one of those inepensive black bakelite boxes with the aluminum top that you see everywhere. That's about 2-3/4" x 3-1/4". That makes it big enough for the CPU and a 64KB sram on the first board, plus a PROM of some sort and a little support logic, bypass cap's and a connector for, say a couple of I/O ports and a connection arrangement to other boards. That's about the size of six 'C' batteries. Since all the memory is on the CPU module, there's little need for off=board addressing, though some ought be supported; perhaps 12 lines of address, 4 controls, and 8 data. That's A0..A11 IOR* IOW* RESET* IRQ* and maybe another clock and *NMI. That's just one start, dense and small for control of a robot or airplane, or car.
How do you guys exchange graphically presented information? Is there some standard graphic format you all use? How would one show a schematic?
ULI
Uli
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