Can you send me some of those 3 bit files? I might try and make a converter if I can understand the file format, although I can't make any guarantees.

I didn't have time to create a decent-looking picture, but here are some old pict file I got:

I'll try to do that soon. It will include the calc GUI and border, though, since I have no clue what are the pic boundaries on the PRIZM.

Of course an actual Minecraft clone for the Casio CFX-9850G and Graph 65 series would be impossible since the CFX series lacks ASM support (except by flashing the ROM chip) and the processor would give something like 1 FPS or less, but I was bored tonight and thought I would make a mockup of what Minecraft for those old calculator models could look like.

Here's some early concept art for an RPG. Two variants on a shop and a rough Player character. 2x as always for better viewing.

I prefer the second version of that shop. And yeah, the char looks nice.

I think the first would be better especially in a smooth scrolling game, since the bricks would blur the shop logos into quite a mess.

Oh my, that's huge!
I'll be also posting some  mockups here soon (TM)

This was generated from a picture of the original Illusiat 13 map (where strings were used). I used Mappy to convert it to 8x8 then replaced the tileset.