I do not know of any official diagnostic images for the R-Pi, but you are free to use my Tags Channel
https://github.com/PeterLemon/Raspberry ... agsChannel
Apart from being a shameless plug, this is the closest thing I can think of to what you want, e.g it displays most Mailbox Property Interface
tags output for a given R-Pi.
This includes temperature, device settings, & setup + lots more from a cold boot.
Also this shows if GPU VRAM setup is working & blitting text characters using DMA channels.
Displays everything in 640x480, so will work on PAL & NTSC CRT T.V.'s, & HDMI T.V.'s/Monitors.
Minimal binary size (44,776 bytes), source is also included =D
I guess you could use my fractal demos to check the VFP is working correctly:
https://github.com/PeterLemon/Raspberry ... FP/Fractal
I hope this helps.