65816 unwrapped

[BigEd]

Some time ago I posted a die shot of the 65816:

BigEd wrote:

Here's a curiousity - this 65816 programming book has a die photo on the cover and it looks like a stretch-limo version of 6502. The datapath appears to be double length not double width:

65816 die from book cover

658162.jpg (12.83 KiB) Viewed 1985 times

Recently I had a look at Bill Mensch's topography patents, and US patent 4,739,475 gives us some dimensions, as well as a floorplan and block diagram:

65816 chip floorplan from patent

As usual, the drawings by the designer are upside-down compared to the photo-micrographs. Notice there's a temporary register (towards the right, labelled 159).

65816 block diagram from patent

Notice the temporary register isn't mentioned here.

Here are the dimensions of the elements in the datapath:

65816 datapath dimensions table from patent

(US Patent 4,652,992 does similarly for the 65c02.)

Cheers
Ed

Edit: replace lost imageshack-hosted images with attachments
Edit: update links to patents