Booting Basic!

Some week ago I tried to load the Basic ROM from an Oric1 and run it with my CPU emulator. First it behaved a bit strange. It didn't return from subroutines as expected. After some debugging  I found  that I had forgotten to add the necessary one to the PC stored on stack when doing RTS. After fixing that it seems to run! I need to read some more on the Oric ROM:s to actually know that it does what expected, but sweet progression after all!