exxos's Atari, Amiga & retro forum

coonsgm wrote: 10 Sep 2024 14:05 I'm not too concerned...not a whole lot of reason to ever use two ROM TOS. Working with 6 ROM's is what's needed.

Well actual EPROMs that work with a 2 ROM setup seem to be thin on the ground unless you build some sort of adapter, so for me and my large stock of 27C256's, 6 chip is always the way forwards.

Working is working.

Thanks for this great tutorial Jonnie.
Just wanted to add, much like coonsgm my Mega 1 would not boot until i removed the 74LS11 chip.
As soon as i desoldered it, booted straight away no problems.
I also found a service bulletin that Atari put out and they do say that it needs to be removed.
Strange that it that it worked for you left on the motherboard!