@richardhutnik

http://www.atariage.com/Jaguar/history.html

5th paragraph

"Some people claimed that the the Jaguar wasn't actually a true 64-bit system, that it was simply two 32-bit processors working in parallel. However, Atari was pressing forward with their advertising campaign touting its 64-bit power..."

Atari had 64 data bus lines and multiple processors hence people think it was 64 bit. Bu the same theory Sega Saturn was 96 bit processor...

You are right about turbographix tho.

Also, gensis only had an 8 bit sound chip...and it bloody shows. :)

I repeat again about the Jaguar:
# Object Processor – 64-bit RISC architecture; programmable; can behave as a variety of graphic architectures
# Blitter – 64-bit RISC architecture; high speed logic operations, z-buffering and Gouraud shading, with 64-bit internal registers.

http://www.vgmuseum.com/systems/jaguar/
- Object processor (processor #2)
- 64-bit RISC architecture
- 64-bit wide registers
- Programmable processor that can act as a variety of different video architectures, such as a sprite engine, a pixel-mapped display, a character-mapped system, and others.
- Blitter (processor #3)
- 64-bit RISC architecture
- 64-bit wide registers


That is 64 bits for more than one processor. Doesn't mean the main CPU was 64 bit, but it did have 64 bit processors in it.  And NO, it isn't adding up all the bits across all the processors.