Beta28 test release

Beta28 test release

Further tandy coco ntsc artifact fixes
Display additional overscan info

Beta29 test release

Beta29 test release
Fix issues with 6847 border colour
Update profiles
Add configuration files for Amiga CPLD boards

Beta26 test release

Beta26 test release
Fix issue with double pixel when horizontal integer scaling is an odd number (x3, x5 etc)
Add auto NTSC artifact detection for tandy coco 1 & 2
NTSC artifact bug fixes

Beta25 test release

Beta 25 test release
Add new menu option to enable grey screen (0xAAA) standby
"HDMI Grey Standby" in the settings menu
Note when the OSD is on the grey screen standby is disabled so you can access the menu

Beta23 test release

Beta 23 test release
Add medium option to NTSC phase setting.
This has full white pixel pairs but some fringing around that white and is a compromise between the soft and sharp options.

Beta24 test release

Beta24 test release:
Add new "Artifact Quality" option (Normal / Sharp / Soft) default is Normal (was medium)
Add Mac Classic profile
Fix issue with Apple IIc profile set to sync on vsync instead of hsync.

Beta22 test release

Beta22 test release:
Detect grey screen (x0AAA) in 12bpp mode and put the screen into standby if present for more than 200 frames
NOTE: THIS MUST BE ENABLED BY EDITING CONFIG.SYS
Change hdmi_blanking=0 to hdmi_blanking=1

Fix issues with Invert G/Y and NTSC artifacting.

Beta21 test release

Beta21 test release:
Updated profiles
Improved NTSC Artifact colours including ability to edit them by modifying the RGBI_(XRGB-NTSC) palette file
Slightly improved NTSC artifact decoding

Beta20 test release

Improved NTSC artifact code with sharp/soft option for double white pixels
Additional profiles & palettes

Beta19 test release

Beta 19 test release:
Update PIXELVALVE2 address for RPI4
Reduce CPU usage in 12bpp mode when not using FF_OSD