Finally got around to working with this laptop again. Clean install of Sierra 10.12.1.
Things done:
Installed Clover, used KextBeast to install FakeSMC, Realtek8111, ran Clover Configurator to get SMBIOS added to config.plist, removed kexts from Clover/kexts.
After making certain the config.plist had no DSDT/SSDT "fixes", rebooted to Clover and F4 to get ACPI dump to Clover/ACPI/origin
Copied the Origin folder to a backup drive and deleted the contents in the Clover folder.
Followed
https://www.tonymacx86.com/threads/guide-native-power-management-for-laptops.175801/. to create PM SSDT and add it to Clover/ACPI/Patched
Copied the DSDT and SSDT files to yet another folder so they were all together.
Followed this guide -
https://www.tonymacx86.com/threads/guide-patching-laptop-dsdt-ssdts.152573/ - for the following:
Downloaded patchmatic / patches / MacIASL and disassembled the native files.
SSDT-0 - seems to be for SATA - compiles with a couple of warnings
SSDT-1 is CPU related with 16 Syntax errors - seems one section was copied 16 times with wrong spacing. First tried to make spacing match, still errors, so tried deleting the extra copies - SSDT compiled with 3 warnings.
SSDT-2 is also CPU related - compiles with warning
SSDT-6 is SATA related and compiles OK
SSDT-7 is \_SB.PCIO = graphics and contains PEG0, PEG1, PEG2, BOD3, GFX0 - compiles OK
SSDT-8 is CPU Power management related and compiles OK
SSDT-9 is also CPU related - \_PR.CPU0 - CPU7 and compiles OK
So, looks like SSDT-1 is the only one that needs to be included in Clover/ACPI/Patched with DropOEM in config.plist.
Next thing tried was installing VoodooPS2 controller, which was a flop.
If installed in Clover/kexts it works great.
https://github.com/RehabMan/OS-X-Voodoo-PS2-Controller/wiki/How-to-Install was not possible to follow completely as the files to be deleted do not even exist in S/L/E in Sierra 10.12.1. Nor are they in L/E.
Using KextBeast I installed the kext to L/E, then copied the daemon to usr/bin per the instructions. Removed the kext from Clover and rebooted. No trackpad function at all. Repaired permissions/rebuild caches, reboot - no change - still no trackpad.
Not sure if it is changes in 10.12.1 or if I did something wrong. It worked in the Beta versions.
@RehabMan - is there a later version? Did I miss something?