Z80, 64K of RAM and 8K of ROM (setup so the rom can be switched off and run totally in RAM) along with a serial port (or 2) all on one chip
No internal ROM/RAM but the HD64180 was close, MMU with bank switching and 2x UARTs.
Here's one in a board from the days when men were men, chips had legs and PCBs were the size of a serving platter not the wussy little credit-card sizes we have now.
http://www.80bus.co.uk/pages/gemini/images/GM880.jpg
I mean what use is a PCB if it can't double as a sand plate for your high-lift jack?
I used the 64180 years ago, very nice chip. Every 6 months or so I fantasise about building a retro board, it would be pretty easy. One day.
I have the Z80 assembler...Writtten in VB6.
Talking of retro.
I also have a VB6 program, started writing it 15 years ago and it's become quite an integral part of my photography DAM workflow. Trouble is it's getting harder to use VB6 stuff with every new version of Windows and I suspect you can't run it at all under W8. How are you going to deal with this? Any pointers?
Rob