Ravi GM driver: incorporate version 0.5.4

20211101

Merge branch 'ravi-0.8.4'

Ravi driver: proper 8086/80186 fix

With this release, the Ravi driver should work on 8086 & 80186 CPUs. Thanks to Jim Leonard for the proper fix.

Ravi driver: 80186 fix

With this release, the Ravi driver should work on 80186 & 286 CPUs.

Sierra support

This release add support for Sierra games:

• S2PPATCH can now patch most of the newer Sierra games
• Added a port of Ravi's Sierra General MIDI driver which should work for most of their older games

Initial release

s2ppatch.zip