STe freezing on floppy/dma access? [solved]

[Steve]

Ok well I guess we can agree to disagree, I think in either situation I learned an STe always needs a blitter. Whether you told me or not. What if I didn't see your hint and decided to do lots of pointless work on it for no reason?

It's not like guiding someone on a schematic.

Just to add to my point.. I *always* try to save you time on the forum by answering basic questions that might *sound* basic to us, but are not to others, like here: https://www.exxosforum.co.uk/forum/viewt ... f=9&t=4881

I don't have to do that or be so helpful. It's a respect thing.

[sporniket]

Is it because you have an MCU with no internal blitter ? I guess that you had the proper jumpers when the external blitter was not installed ?

I don't see any jumpers, are there some? Of course the mcu has no internal blitter, it has an external blitter :)

In fact not jumpers, as Atari prefered to use "zero Ohm" resistors instead (like for the ROM configuration). Search R111 and R112. (Sheet #1 of the original schematic, and p3 of my reworked schematic). You can see them in one of my close-up pictures (image 20 of 42) on this topic https://www.exxosforum.co.uk/forum/viewt ... =51&t=2141 , they are between the CPU and the "phantom footprint" of the external blitter (my motherboard is a later revision without any option to install an external blitter anymore).

The later revisions of the MCU have an internal blitter.

[Steve]

Cheers @sporniket :)

[Badwolf]

I learned an STe always needs a blitter.

Not strictly true. If your mobo doesn't have the space for the links shown in the below rev-A schematic, you could short the BGI/BGO and BGKI and BGKO pins on the back of the socket.

This (well the first one -- BGK works differently), is the direct equivalent of the jumper on the expansion port of the Falcon.

BW.

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