exxos's Atari, Amiga & retro forum

Hi, i could love to get some kind of 68030 at least accelerator on my atari st.
They are sellers selling fully assembled and ready to go TF5354 on ebay, they test them on amigas and told me that i just need to plug it on the 68000 socket on the st the accelerator don't need modifications.

So i have a lot of questions:

Does the TF534 can be used on the atari st ?
https://www.ebay.com/itm/TerribleFire-T ... 3488487602

My atari stf have the cpu in the front under the keyboard, how one can place the accelerator and close the keyboard ?.

This seller sells cpu relocators for the amiga i supose they should work on the atari st ?.
https://www.ebay.com/itm/Flexible-CPU-R ... 3292989344

I read that the tos revisions that work on the atari st don't support 68030 but the stf can't be updated to tos 2 so how one get the accelerators to work ?.

The STF with the CPU under the keyboard is quite hard to upgrade. The space between the keyboard and the CPU is very narrow, Another issue is the fact that Atari soldered the 68000 CPU to the PCB, so you need to desolder the chip, that is not an easy job. After desoldering the CPU you need to solder a socket in it's place. The Amiga 68000 relocator does not fit in an STF.

TOS 1.x does not support large stack frames. TOS 2.x does, the problem is that TOS 1.x is 192 KB in size and TOS 2.x is 256 KB in size so that needs different memory locations. To install TOS 2.x in an STF you need some logic to relocate it to higher memory locations.

Another issue is, that a faster CPU causes timing problems that will break some games or demos, an STF doesn't have stuff like hardware scrolling, sprites or other fancy stuff. So in order to create nice and smooth scrolling games programmers had to do stuff in software or to be more specific had to use programming tricks to make the hardware perform stuff it wasn't supposed to do. Will run perfectly on an 8 Mhz 68000, but when things are running faster weird things can happen....

Having game break was something i was expecting i have an ste to use for games.

So if i desolder the 6800 cpu and solder the relocator board directly to the ST pcb do you thing doing that it could fit ? to reduce space usage.

Also does softloading emutos could do the trick ?, i have been testing it this way not sure if this can work in an acelerator ?.

thanks for all info !.

Have a look at this topic, it shows the efforts that Agranlund went to to get the TF534 working on the ST.

It is worth doing if you can safely remove the old cpu.

https://www.exxosforum.co.uk/forum/viewt ... =68&t=2149