Update core to 1.23.0

[ToniBC]

Mednafen was recently updated with several corrections of this emulator and it would be nice to include them to improve those small errors. I don't know if some have already been applied, but since the core only reflects that it is in 0.9.36.1, they supposedly were not added.

After 0.9.36.1 this is what they changed:

• NGP: Initialize XIX, XIY, and XIZ to match what the BIOS leaves them as(as observed via MESS' debugger), and removed the ROM patches/hacks for "Puyo Pop".
• NGP: Utilize exceptions in the ROM image loading and initialization code.
• NGP: Fixed some endian-related issues in regards to reflecting bits of the ROM header to RAM during initialization.
• NGP: Initialize VRAM differently to partially reflect the state the BIOS leaves it in, and removed the "Metal Slug - 2nd Mission" ROM patch/hack (thanks to "FluBBa" for the tip on what the game was doing/relied on).
• NGP: Fixed a potentially-exploitable overflow bug in the FLASH dirty block list code.
• NGP: Added proper error handling(using exceptions) to the FLASH loading and saving code
• NGP: Fixed a couple of shadowed-variable warnings in T6W28_Apu.cpp.
• NGP: Added a couple of missing sound chip emulation variables to save states.
• NGP: Fixed several off-by-1 bugs in the address to ROM data translation function.
• NGP: Replaced min/max macros with usage of std::min/std::max.
• NGP: Fixed a sequence point rule violation that could cause "Gals' Fighters" to malfunction when Mednafen was compiled with clang, per tip from stellarporter.
• NGP: Added very incomplete emulation of BIOS system call "VECT_FLASHERS", per tip from stellarporter. Fixes eventual hang in "The Last Blade".
• NGP: Fixed TLCS-900H new IFF calculation when taking an interrupt, per tip from trinemark. Fixes broken voice playback in "Densetsu no Ogre Battle Gaiden".
• NGP: Fixed potential division by zero in the TLCS-900H MINC and MDEC instructions emulation(the emulation of the instructions is still almost certainly wrong, though), per tip from byuu.

As always, thank you very much for the effort and this is only to remember that it is pending to update the core.

[ghost]

This core was mostly kept to-date except for the very latest changes and some Zilog 80 Sound fixes that weren't ported since forever. The TLCS-900H I couldn't find so maybe it was in there already.

I do want to make a 2nd pass later to make this thing easier to future maintain for others. It's still easy to miss something since there's enough structural, formatting diffs with upstream.

[ghost]

Wow. That was more difficult than I wanted. But it's sitting here. A full update to 1.23.0. Should be much easier to update in future. https://github.com/libretro/beetle-ngp-libretro/pull/73

If this gets approved, I'll work on updating Beetle WSwan and VB cores. Less so with PCE, PSX, SS, PCFX (full); upgrading that cdrom code is terrible.

[ToniBC]

Many thanks.