Anyone have any info on a Tektronix X221CHT?

Hi, All, I unearthed what appears to be a Tektronix X terminal, marked on the bottom: MODEL: X221CHT SERIAL: <serial number> LAN: 08 00 11 <xx> <xx> <xx> KEY: <17 digit alphanumeric> The connectors on the back are: 8-pin DIN marked +5VDC/+12VDC PS/2 Mouse PS/2 Keyboard 15-pin VGA 2x DE9-M serial "RJ45" Ethernet 10Base2 BNC several empty rectangular openings presumable for expansion mods Inside is: Sonic-T DP83934CVUL-25 TI TLC34076-135FN Video SRAM LSI LR33020MC-25 "GRAPHX PROC" Tektronix 160-9461-00 29F010 FLASH EEPROM 2x 72-pin SIMM sockets with on SIMM installed, appears to be 4MB Chip dates are frequently last 60 days of 1996. Two minor SOIC parts have the newest visible date code, 9701. I do not have the PSU for it and have not tried powering it on. I can probably solder some wires to the back of the PCB to feed it +12V and +5V, but I'm a little surprised to find zero information on the web searching for variants of the vendor and model number. Anyone here have any info? If it is an X terminal, it's probably a brick without a somewhat sizable tftp area for it to slurp up. Thanks for any tips, comments or pointers. -ethan