CD loading working, still no game (Patreon)

Hi!

As announced in the last post, I implemented CD iso/bin loading with second SDRAM, which is now in place and working.

I can convert testroms in .exe format to a bootable CD and run them from this format.

Unfortunatly this didn't enabled me to run games yet. At least some games small enough to fit into a 128Mbyte SDRam module should be working, but they are not.

I verified in simulation that the CD module returns exactly the same data as my emulator for booting some games, so the problem is likely somewhere else and must be debugged now.

However, my goal was always to have one game playable by end of this year, so there is still quiet some time left and it should be possible to reach, as all features required are there now.

Unfortunatly, with debugging, I cannot say how long it will take, so give me some time. Whenever I have something working, I'll report back for sure :)

Have fun!