Once the thread about "Mega STe only boots in monochrome" is solved (and I don't know how because I couldn't start in colour mode and after trying some times, 4 days, it worked ) now the thread beared to another problem. That's why I prefer opening a new thread about it. Thanks to all Atari-Forum members that helped me
This is the new challenge :
I have an Atari Mega STe (4MB, 105 MB HD, 1.44 HD FD) that I recently adquired. It came with TOS 2.05 GER.
When I tried to start from a bootable disk (games) by pressing ALT to skip booting from HD, it went to GEM screen with A: and B: units but didn't start the game.
Then I upgraded to TOS 2.06 UK and when I press ALT, the system crashes and shows me 4 bombs. It crashes with or without disk in the disk drive. Just press ALT for a few seconds and crashes.
Uninstalled the Hard Drive and without pressing anything it boots from the HD FD well (but I didn't succeed in loading a game...all went to a flying bee or black screen with music . Is this normal in 2.06 TOS?)
@Zogging Hell (thank you for your interest!!!!) pointed to be caused by the HD FD (I have one and switch 7 is ON)... then I made some researches and I found the following (http://atari-forum.com/viewtopic.php?f= ... 8&start=25):
That's all...any ideas???I have been looking about HD FD in Mega STe and I found that maybe is more complicated than I expected...
First I have to check if with in DD FD mode it crashes too. If it crashes...there is a different problem than the HD FD.
If it doesn't crash I should make a decision...or I stay in DD mode or go for the HD mode. First one is easy...the second one...As I read (can someone correct me if I am wrong, please?):
1.- See which kind of HD FD I have.
2.- Look on the right hand side of the mainboard and search for a socketed chip and if there is an old controller installed there is written "WD1772" onto it. If there is C303096-001 or C302434-001 written onto it I already have an AJAX chip. Is there any difference between this two AJAX chips?
3.- There seems that is another needed mod (http://www.atariage.com/forums/topic/10 ... ge__st__25) :
Please check if there is a connection between pin32 of U7 (MC68000) to pin19 of UA02 (PAL20L8). If not you have to solder a little wire between those two pins.
Then check if you have TIBPAL C301901-002 (the same UA02 as above) installed. If you have an old C301901-001 you have to replace that chip. Otherwise HD will NEVER work. Please check Best Electronics if they have this PAL.
I don't understand this part
I don't have any chip installed in UA02 because I don't have a coprocessor...(but I will ) . Which one do I have to install (I mean in the UA02)?? Is it necessary to do those solderings? I understood that C301901-002 is the one I have to plug in the UA02 socket...is it correct?