With the 990 in standby, press the input and enter buttons together and release them. The firmware version will show on the 990's display. The product page for the 990, found at the bottom of the product page under legacy stuff, shows the last version as 3_24. If you see that, then you should be good.
Or, check out the list of updates from the software link on the 990 product page and check if yours has these features.
It's time to hit "send", and leave.
Main HT <> 975 <> 7200 <> Ultra X-12 <> sapphire ST2 mkII RF/LF <> sapphire SC center
sapphire ST2 mkII SBR/SBL <> sapphire SS SR/SL <> iView over the air converter/DVR with 320Gb external HD <>
Lava HD-2605 Ultra 150 mile antenna <> Vizio E70U-D3 70" LCD <> Samsung BD-F5100 <> Amazon Fire TV