Nah, it was reasonably easy. The main issue with 4MB calcs is that it used a secondary hardware port to add two extra bits to the page address. Until then we we

Nah, it was reasonably easy. The main issue with 4MB calcs is that it used a secondary hardware port to add two extra bits to the page address. Until then we were able to page with only one port, so everywhere was hardcoded to use it. We had to replace all of that with a marcro, and update a few places manually. There's a comment in that code which speaks to this: ; we can't use getBankA because it behaves differently on the 84+CSE, and we don't want that getBankA was the name of the macro we used to interrogate which Flash page was swapped into bank A (address space 0x4000-0x7FFF). The real pain with that port was the new color screen.