65816 unwrapped
Posted: Fri Aug 26, 2011 9:30 pm
Some time ago I posted a die shot of the 65816:
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:
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).
Notice the temporary register isn't mentioned here.
Here are the dimensions of the elements in the datapath:
(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
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 1983 times
- 65816 chip floorplan from patent
- 65816 block diagram from patent
Here are the dimensions of the elements in the datapath:
- 65816 datapath dimensions table from patent
Cheers
Ed
Edit: replace lost imageshack-hosted images with attachments
Edit: update links to patents