exxos's Atari, Amiga & retro forum

Hi,

I am pleased to announce that the Vortex AtOnce-386SX emulator has been reverse-engineered and reproduced. I found the type of FPGA used and read the information from the protected GAL chip. All of this was possible thanks to very generous donors tIn and GGN. Hats off to them and many thanks for providing the devices. tIn sent the DIP version and GGN sent the PLCC version.

For now, this is the DIP version for the Atari ST and MegaST. A PCB for the PLCC version for the Atari MegaSTe is on the way. When I finish all the work on the project - the documentation of both versions will be published on the www - as always - for free.

Cheers
tOri

The EMulator in my MegaST4

Nice work

That's a lot of work!

:bravo:

That is absolutely awesome! Great work!

Great work!

Good stuff :)

Hi!

Documentation of DIP version of ATonce-386SX PC emulator has been published on my www in Atari 16-bit section. I invite all interested in...

https://reversing.pl/atari16bit/v386sxd ... sxdip.html

Please use Google Translator to read because site is written in Polish language.

Cheers
tOri

Awesome. Great work. I will probably try to build one of these. :P

By the way, I saw on the Polish forum that you did a relocator board for MegaST. Is that finished and do you plan to publish that? ;)

Hi DoG,

Yes - I made a simple relocator. I will post the files of this project on the www. Basically, it is a parallelization of the processor except that resistors 33R have been placed in each line between the pads.

I am working on MegaSTe version of ATonce now.

It is possible to make relocator for MegaSTe or STe too because I found good solution for the PLCC68 plugin using 1,27mm angled goldpins and 3Dprinted insert. I've used it in MegaSTe prototype of ATonce-386SX.

tOri