Hmm, had a quick skim though mactracker. The only 2 macs with code names like that are the Quadra/Centris 610, and Quadra/Centris 650, which went by the code names "Speedbump 610" and "Speedbump 650", respectively.
Judging by the 4 nubus slots, it might be based off the 650, as that one had 3 nubus, and 1 PDS slot.
But if you say it's a PPC, then maybe a early 7100, as they share the same case as the 650. I know the 7100 used Carl Sagan, BHA, and LAW for code names, but nothing else as far as I know.
I can see this is an older discussion, but: As the 630 before it the 5xxx has a resolution of 320x240 for TV. (I think this is the same for 64/6500). You can easily have fullscreen display by pressing cmd.-3. There are photos of performas running sega or other consoles, no problems with these things (on this site). Displaying TV requires both the AV- and TV- (or TV/Radio - as some 5500 models may have) card. Simply use the antenna connector, find the console's channel and let go.
On a 5200/75 it looks like this: http://retromaccast.ning.com/video/what-performas-are-made-for
Before I got my iMac G5, I had been given a Mototola StarMax 4000 MT by someone I met at a GNU/Linux user group. I had upgraded it to 128 MB RAM and it had a 200 MHz PPC 604e processor. It ran Mac OS 9.1 smoothly, especially after upgrading the video from the paltry 4 MB VRAM to the 16 MB Voodoo3 2000 PCI card that I had laying around. It even ran Debian "sarge" quite well, which is where I found myself often when I wanted to use the current software at the time.
Plus, I loved the fact that I could use the PS/2 ports for the mouse. I used a program called Mouse2B to enable the contextual menu on the secondary mouse button within Mac OS 9. Debian pretty much took care of that without any third-party software. :-p
finally I got my own TAM. As I already own a 5500 (what is supposed to be a similar machine), I planned to use the parts from the 5500 in the TAM (RAM, USB, Sonnet G3, CommSlot II Ethernet and Hard Disk).
But now I found out the disk in the TAM is different in physical size, so I guess I can't simply replace it with the one from the 5500.
So now my questions are:
1. What kind of hard disk is this (Connector/Measurements)?
2. I used to have a 120GB in the 5500 (and it's 90% used, so I really need this space), is this also possible in the TAM? (I read somewhere that more than 4GB don't work?)