* Added akkaarrh to the ci target.
* Switched Travis CI to Ubuntu Focal.
* Allow ppc64le CI build to fail.
* Report CI status as soon as a job has failed or remaining jobs are allowed to fail.
PowerPC architecture is special in a way that it has some inline assembly
code but no DRC support. As a result, NOASM=1 was never configured.
In contrast to the old DRC, asmjit only compiles on the architectures it
supports. FORCE_C_DRC_BACKEND=1 needs to be passed to the makefile or
the compilation will fail.
Sound and other improvements to Sega G-80 games: [Aaron Giles, couriersud]
* Added netlist-based sound to Eliminator, Zektor, Space Fury, and Astro Blaster.
* Split the Sega Universal Sound Board and Speech Boards into their own separate files.
* Improved Universal Sound Board implementation for better accuracy in Star Trek and Tac/Scan.
* Wrote netlist-based backend for Universal Sound Board; currently disabled due to limitations in the system.
* Wrote netlist-based backend for Speech Board; currently disabled pending future sound system changes.
* Implemented wait states and the vector DRAW flag to help improve timing.
SP0250 Improvements: [Aaron Giles]
* Matched clock divider to real chip measurements.
* Fixed behavior when not fed enough data; addresses "gapping" in speech in Sega games.
* Implemented accurate LFR noise generator according to real chip measurements.
* Added pulse-width modulation DAC output mode for future consumption by netlist.
Netlist additions: [Aaron Giles]
* Added compile-time option to record nltool-compatible CSV files.
* Improved CD4020 implementation.
* Fixed CD4053 behavior.
* Added 74139 device.
* Added TL082 device.
8253 PIT changes: [Aaron Giles]
* Added explicit synchronization to all writes.
* Cleaned up some timing calculations to avoid double<->attotime conversions.
- tms34020: Upgrade data bus to 32 bits and add preliminary masking for 16-bit operations
- tms34010, tms34020: Eliminate pure 8-bit read/write bus accesses (these are always read-modify-write, even if aligned)
- btoads, midxunit: Use 8-bit handlers for NVRAM, reducing size to 8192 bytes
- midwunit, midxunit: Eliminate dependencies on midtunit driver
