x86 servers are like that. PC/AT memory map have the range for VRAM, but RS232C is optional, so you can't just have the RS232C and not VGA on an x86 as its debu

x86 servers are like that. PC/AT memory map have the range for VRAM, but RS232C is optional, so you can't just have the RS232C and not VGA on an x86 as its debug/recovery interface. Platform designers can make up their own memory maps, so non-x86 ones can just have UART I/O buffer and hardware interface wired up in whatever address you want and forgo VGA. I have a 32bit SPARC machine on a shelf I got from a junk hardware shop, it has a DB25 for console. It's ok.