Thanks for you response Chris.
I got a Satellite box called the Spiderbox, and it can run some of the MAME ROMS (about 20), it uses the remote control to play the games, you can map the remote keys to game controls on the MAME setup page, some of the games don't have sound.
It's a very clever emulator, it uses software to simulate the hardware chips.
As you say the HDR may not have the processing power, but it would be dam cool to be able to play native Galaxians or better Phoenix on the HDR through the Portal, just a dream...
My old Humax PVR9200T, had a highly addictive game based on a Bejeweled clone, the simple games are always the best, you would have thought the HDR would have something similar.
I see that Tesco are discounting there Freeview HD boxes, maybe because Channel Zero is on its way out, as they still don't have BBC iPlayer working, I will buy another Humax.