(mirror of krom's post, originally found here)

max_power wrote:

In particular, this seems very useful and to be a part of a larger document which I have however not been able to find online.

Looking in that same directory at all the PDF files, I found this doc which seems to be part of the same set: http://hcs64.com/files/RDP_COMMANDS
I too would love to see the full set of docs, good luck with your search =D

Here is another useful unofficial doc from Dragon Minded: http://www.dragonminded.com/n64dev/Reality%20Coprocessor

BTW I have noticed a mistake in every single official/unofficial N64 doc I have ever come across:
The RDP opcode "Sync Load" is always stated as hex command "0x31" but the command portion is actually meant to be "0x26"!!

For completeness here is a list of every Nintendo patent I have found in relation to the N64 (This includes doubles):
https://patents.google.com/patent/US5664162 - GFX Acceleration Info
https://patents.google.com/patent/US5742277 - Antialiasing Of Silhouette Edges
https://patents.google.com/patent/US5754660 - 3D Sound Generation
https://patents.google.com/patent/US5796547 - Nintendo DD Disk Cartridge & Drive Mechanism
https://patents.google.com/patent/US5812147 - RSP Info
https://patents.google.com/patent/US5897437 - Controller Pak
https://patents.google.com/patent/US5923641 - Nintendo DD Disk Cartridge
https://patents.google.com/patent/US5940245 - Nintendo DD Door Opening & Closing Mechanism
https://patents.google.com/patent/US5978339 - Nintendo DD Mechanism Mount
https://patents.google.com/patent/US6001015 - Controller
https://patents.google.com/patent/US6018720 - Nintendo DD Purchase Software
https://patents.google.com/patent/US6022274 - RCP Info
https://patents.google.com/patent/US6071191 - RCP Info
https://patents.google.com/patent/US6104402 - Z-Buffer
https://patents.google.com/patent/US6126547 - 2 Player Viewport
https://patents.google.com/patent/US6141730 - Nintendo DD
https://patents.google.com/patent/US6154338 - Nintendo DD Cartridge Mechanism
https://patents.google.com/patent/US6155926 - Mario 64 Programming
https://patents.google.com/patent/US6165073 - Camera Look At Object
https://patents.google.com/patent/US6166748 - RDP Info
https://patents.google.com/patent/US6190257 - CIC & PIF Info
https://patents.google.com/patent/US6200253 - Controller Pak
https://patents.google.com/patent/US6203431 - Shadows
https://patents.google.com/patent/US6220962 - Direction Marker
https://patents.google.com/patent/US6230232 - Nintendo DD
https://patents.google.com/patent/US6238291 - Controller Bi-Directional Communication
https://patents.google.com/patent/US6239806 - Controller Analog Placement
https://patents.google.com/patent/US6239810 - RDP Info
https://patents.google.com/patent/US6261179 - StarFox 64 Programming B
https://patents.google.com/patent/US6264558 - Controller
https://patents.google.com/patent/US6280329 - Player State Music
https://patents.google.com/patent/US6285381 - Nintendo DD Video Capture
https://patents.google.com/patent/US6290604 - Shadows
https://patents.google.com/patent/US6296570 - StarFox 64 Programming A
https://patents.google.com/patent/US6325717 - Player Surface Interaction C
https://patents.google.com/patent/US6331146 - Mario 64 Programming
https://patents.google.com/patent/US6331856 - RDP Info + Usage Notes
https://patents.google.com/patent/US6332840 - Controller Analog Mechanism
https://patents.google.com/patent/US6342892 - RDP Info
https://patents.google.com/patent/US6352476 - Direction Marker
https://patents.google.com/patent/US6383079 - RCP Info
https://patents.google.com/patent/US6383080 - Kiosk Printing
https://patents.google.com/patent/US6414678 - Z-Buffer
https://patents.google.com/patent/US6414721 - Video Signal
https://patents.google.com/patent/US6453379 - Nintendo DD
https://patents.google.com/patent/US6454652 - Controller Enhanced 3D Character & Background
https://patents.google.com/patent/US6464585 - Controller + Sound
https://patents.google.com/patent/US6468160 - Nintendo DD Security
https://patents.google.com/patent/US6485369 - Player State Music
https://patents.google.com/patent/US6497618 - Controller
https://patents.google.com/patent/US6538666 - Speech Recognition
https://patents.google.com/patent/US6540612 - StarFox 64 Programming B
https://patents.google.com/patent/US6556197 - RDP Info + Usage Notes
https://patents.google.com/patent/US6572478 - StarFox 64 Programming A
https://patents.google.com/patent/US6593929 - RDP Info + Usage Notes
https://patents.google.com/patent/US6599194 - Hard Disk Drive & Internet Access
https://patents.google.com/patent/US6612930 - Player Surface Interaction C
https://patents.google.com/patent/US6626760 - Camera Look At Object
https://patents.google.com/patent/US6634947 - StarFox 64 Programming B
https://patents.google.com/patent/US6676520 - Controller Rumble Pak
https://patents.google.com/patent/US6677967 - Nintendo DD Video Capture
https://patents.google.com/patent/US6679776 - Vibration
https://patents.google.com/patent/US6692357 - Player Surface Interaction A
https://patents.google.com/patent/US6712703 - Player Surface Interaction B
https://patents.google.com/patent/US6712704 - Nintendo DD Security
https://patents.google.com/patent/US6769989 - Nintendo DD Randnet
https://patents.google.com/patent/US6894686 - Perfect Dark Perfect Head
https://patents.google.com/patent/US6917356 - Controller Analog Placement
https://patents.google.com/patent/US6935954 - Zelda Sanity System
https://patents.google.com/patent/US6942573 - Nintendo DD Security
https://patents.google.com/patent/US7070507 - Controller Rumble Pak
https://patents.google.com/patent/US7102618 - Controller Analog Placement
https://patents.google.com/patent/US7302627 - RSP Info
https://patents.google.com/patent/US7466433 - 3D Object Printing Service
https://patents.google.com/patent/US7594854 - Controller
https://patents.google.com/patent/US7783535 - Player Surface Interaction B
https://patents.google.com/patent/US7873812 - RSP Matrix Multiplication
https://patents.google.com/patent/US20010001767 - Shadows
https://patents.google.com/patent/US20010006391 - Nintendo DD Video Capture
https://patents.google.com/patent/US20010010067 - Nintendo DD
https://patents.google.com/patent/US20010011036 - Direction Marker
https://patents.google.com/patent/US20010012802 - Controller Rumble Pak
https://patents.google.com/patent/US20010016517 - Controller Rumble Pak
https://patents.google.com/patent/US20010016518 - Controller Rumble Pak
https://patents.google.com/patent/US20010021670 - GB Save Data Pak
https://patents.google.com/patent/US20010046895 - Player State Music
https://patents.google.com/patent/US20020019257 - Player Surface Interaction A
https://patents.google.com/patent/US20020128070 - StarFox 64 Programming A
https://patents.google.com/patent/US20020155889 - Player Surface Interaction B
https://patents.google.com/patent/US20030080963 - RDP Info + Usage Notes
https://patents.google.com/patent/US20030087698 - Controller
https://patents.google.com/patent/US20030104864 - Player Surface Interaction C
https://patents.google.com/patent/US20040224760 - Player Surface Interaction B
https://patents.google.com/patent/US20050174328 - Controller Analog Placement
https://patents.google.com/patent/US20110072238 - RSP Info
https://patents.google.com/patent/USD376826 - Prototype Controller
https://patents.google.com/patent/USD377488 - Cartridge
https://patents.google.com/patent/USD381628 - Connector Plug
https://patents.google.com/patent/USD393013 - Nintendo DD Unit
https://patents.google.com/patent/USD402328 - Nintendo DD Unit
https://patents.google.com/patent/USD405477 - Controller Pak
https://patents.google.com/patent/USD410403 - Voice Recognition Adapter
https://patents.google.com/patent/USD419199 - Nintendo DD & Console Stack
https://patents.google.com/patent/USD419200 - Nintendo DD & Console Stack
https://patents.google.com/patent/USD428893 - Cartridge
https://patents.google.com/patent/USD442998 - Nintendo DD Unit

I am also on the lookout for info on this N64 "Bézier surface" microcode: http://www.gamasutra.com/view/feature/131794/an_indepth_look_at_bicubic_bezier_.php?print=1

Hope this helps =D

*EDIT* I have updated this list with many more N64 specific patents. Special thanks to Gilgamesh for bringing them to my attention =D

Tibet Mimar Patents:
(Even though these are not N64 specific, you can see the formatting of RSP type vector opcodes in these patents)
https://patents.google.com/patent/US6963341
https://patents.google.com/patent/US7126991
https://patents.google.com/patent/US7506135
https://patents.google.com/patent/US7548586
https://patents.google.com/patent/US7793084
https://patents.google.com/patent/US7873812
https://patents.google.com/patent/US8069334
https://patents.google.com/patent/US8352528
https://patents.google.com/patent/US20080077769
https://patents.google.com/patent/US20090276606
https://patents.google.com/patent/US20090316798
https://patents.google.com/patent/US20100274988
https://patents.google.com/patent/US20110072065
https://patents.google.com/patent/US20110072236
https://patents.google.com/patent/US20110087859
https://patents.google.com/patent/US20130212353
https://patents.google.com/patent/US20130212354
https://patents.google.com/patent/US20130212355