Manuals reference in the main ISA

[AlfredoRodrigues4]

When trying to use the RISC-V architecture even for simpler tasks it normally is necessary to search in different manuals. Other issues already have been raised due to lack of information in the ISA that was supported by external manuals, (issue: pseudoinstructions list missing), (issue: No mention of jr pseudo-instruction). I recognize that there has already been some discussion about merging some manuals (and has in fact happened in some cases like the "CMO" Extension), but I think that while merging manuals is a time-consuming process, a quicker fix solution until the discussion about merging is concluded would be to refer some of these manuals in the ISA manuals.

 What I suggest is something as a "Table of manuals" after the ToC, with a list of some of the most commonly used external manuals. The RISC-V assembly, the pseudoinstructions and the general purpose registers are some topics that raise up a lot of questions (issue: don't find the manual) and I believe that may occur due to many people not being able to instantly find this information. 

I agree that the merging process would better serve some of these manuals but there are some, like the ABI, that could even stay referenced like this instead of adding all the information into the ISA.

A list of those manuals could include:

• Watchdog timer
• Assembly manual
• External debug support
• ABI / API / SBI - (ABI support) (API support) (SBI support)
• IOMMU

This isn't usual in other vendor manuals because normally they have these small documents merged in the main ISA manual.