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EmuCR: higanhigan v106r75 is released. higan (formerly bsnes) is a Nintendo multi-system emulator that began development on 2004-10-14. It currently supports the following systems:
- Famicom
- Super Famicom
- Game Boy
- Game Boy Color
- Game Boy Advance

higan also supports the following subsystems:
- Super Game Boy
- BS-X Satellaview
- Sufami Turbo

higan Changelog:
* Update to v106r75 release.

byuu says:

So tired ... so much left to do still ... sigh.

If someone's up for some code golf, open to suggestions on how to handle
the INTNEST control register. It's the only pure 16-bit register on the
system, and it breaks my `map`/`load`/`store` abstraction.
Basically what I suspect happens is when you access INTNEST in 32-bit
mode, the upper 16-bits are just undefined (probably zero.) But
`map(INTNEST)` must return a uint32& or nothing at all. So for the
time being, I'm just making store(ControlRegister) check if it's the
INTNEST ID, and clearing the upper bits of the written byte in that
case. It's hacky, but ... it's the best I can think of.

I added LDX, which is a 900H-only instruction, and the control register
map is for the 900/H CPU. I found the detailed differences between the
CPUs, and it doesn't look likely that I'm gonna support the 900 or
900/H1 at all. Not that there was a reason to anyway, but it's nice to
support more stuff when possible. Oh well.

The 4-byte instruction fetch queue is going to have to get implemented
inside fetch, or just not implemented at all ... not like I'd be able to
figure out the details of it anyway.

The manual isn't clear on how the MULA flags are calculated, but since
MUL doesn't set any flags, I assume the flags are based on the addition
after the multiplication, eg:

uint32 a = indirect(XDE) * indirect(XHL);
uint32 b = reg16; //opcode parameter
uint32 c = a + b; //flags set based on a+b

No idea if it's right or not. It doesn't set carry or half-carry, so
it's not just simply the same as calling algorithmAdd.

Up to almost 70KB, not even halfway done, don't even have a disassembler
started yet. There's a real chance this could overtake the 68K for the
biggest CPU core in higan, although at this point I'm still thinking the
68K will end up larger.

Download: higan v106r75 x64
Source: Here

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