* hng64: misc cleanups
* hack so that the racing games don't crash when entering gameplay (previous handler here was just guesswork anyway)
* validation (nw)
* Improve Taito Zoom ZSG-2 sound emulation
zsg2.cpp: implement emphasis filter, this is a noise reduction scheme
that amplifies higher frequncies to reduce quantization noise.
zsg2.cpp: Add sample interpolation and another adjustable lowpass
filter. This seems to be roughly what real hardware does...
zsg2.cpp: Improve panning registers and identify DSP output gain
registers.
* zsg2: minor changes [nw]
zsg2: Register 0b appears to be status flags [nw]
zsg2: Linear ramping probably makes more sense [nw]
* zsg2: slight adjustment of emphasis filter [nw]
* zsg2: slight adjustment of emphasis filter #2 [nw]
* zsg2: more sober ramping algorithm [nw]
bus/c64: Use DERIVED_CLOCK instead of machine().device hackery for passthru carts (nw)
c64.cpp, c128.cpp: Use input merger devices for all emulated interrupts (nw)
* Fixed DISC_555_TRIGGER_DISCHARGES_CAP option in DISCRETE_555_MSTABLE. This fixes the sound in Amazing Maze (maze) so that it plays for more then 30s.
* Fixed filenames in DISCRETE_CSVLOGx and DISCRETE_WAVLOGx making them function again.
* Revert "Fixed filenames in DISCRETE_CSVLOGx and DISCRETE_WAVLOGx making them function again."
This reverts commit f4a35c3ef0edb7181be02e1ae3a94f05bce7587c.
* Fixed filenames in DISCRETE_CSVLOGx and DISCRETE_WAVLOGx making them function again.
* interpro: headless boot working
These fixes enable booting and CLIX installation on headless InterServe systems (InterPro systems without graphics) using a VT100 or VT220 compatible terminal on serial port 2 (0 for ip6000). It's now possible to install and boot CLIX on the ip6000 system, as this works around the issues with the incomplete graphics hardware support in the driver.
* interpro: tidy serial configuration, add missing control lines
* ioga: fix serial dma
* z80scc: update /WREQ when transmitter is enabled/disabled, use 0 for assert state of active low output
* softlist: added 60x0 CLIX root floppies
* z80scc: tidy (nw)
Finished hooking the UPD7759 up to the following drivers:
vgmplay
Bay Route (encrypted, protected bootleg)
E-Swat - Cyber Police (bootleg, set 1)
Golden Axe (encrypted bootleg)
Passing Shot (2 Players) (bootleg)
