I bought an Atari Mega ST, and when I opened it to clean it well I noticed it hadn't the Blitter chip....I managed to get one but when it is inserted, thed FD doesn't work properly (doesn't read) and system fails just when you move the cursor on the desktop (the cursor disappears ). The workbench is in german and it seems that is an old Mega ST2 because I think it can't read the DD FD (but it has the WD1772).
I have attached some pictures, so you can see the blitter chip and the mainboard. I would like to replace TOS with a newer version (maybe is the problem because the german version doesn't has the blitter option, but I couldn't check it with it inserted because the cursor disappears...), but I don't know how to burn the Hx and Lx parts to an EPROM (27C256) yet (but I have the files made).
What can I do? Is it possible to make it work with the Blitter?
One other question is...what is the 6pin power connector without any plug in it (close to the PSU)? There are two of them, one next to the other. The other one is plugged with a 6pin power connector.
Thank you for your help
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Trying to learn...