With the standard 68EC020 cpu onboard the A1200, the bus is 24 not 32-bit. Adding a cpu upgrade with fastram gives 32-bit. Unless he was referring to AGA? If he was then the falcon bus width should have been listed as 16 not 32.
Nope, the standard A1200 bad a full 32bit bus, although one that was shared with the AGA chipset (if you didn't have a FastRam card). The 24-bit thing is just the size of the address space, this is what limited the size of A1200 memory expansion (the ones that lacked a CPU) cards to just 8MB.
Adding a full 68020 or '030 would give you the full 32bit address space and let you install more than 8MB of RAM.
