I am setting up the OS9 68K SDK v12 compile package. I have unzipped os9_68k_sdk_v12.zip and put the contents in "M:\MWOS".

Do I put the contents of os9-m68k-ports-main.zip in M:\MWOS as well?

I want to copy the CB030 folder to Tiny68K folder and try to port it, of course, to the Tiny68K, MB012 and T68KRC boards. Anything special I need to know about making these changes. I have never done this before so please include every little detail if possible.

• adjust ROM_CBOOT/sysinit.a to perform the correct (possibly minimal) early startup tasks
  
• adjust the bootfile lists to select the correct kernel and other system modules
  
• adjust systype.d to select the correct CPU type, I/O addresses, vectors, CFIDE configuration, etc.
  
• write a new ticker driver to use the 68681 timer and sort out any conflicts with the (nigh-unreadable) OS-9 68681 serial driver
  
• adjust the RTC driver as required; either to stub it out so that the system will prompt for the time / date at bootup, or to read the time/date from some other RTC of your choosing (IIRC there are issues with Bill's board layout that make the tiny68k onboard RTC non-functional, you could use the RTC he designed for CB030).
  
• adjust the bootfiles and probably other Makefiles so that only the bootloader goes in the serial ROM
  
• add new disk image generation logic / config as required to build a bootable CF image
  

Would one of the "Frugal RAM/ROM 512K" or the "Improved 512K RAM/ROM" RC boards and my MB012 board with 2 RC slots be enough to boot OS9 68K from the flash memory and be up and running to access the OS9 filesystem on the CF Card?

Does the OS9 port require any hardware mods - notably the 16-bit CF mods?
What about the timer?