bsnes

Commit Graph

Author	SHA1	Message	Date
Tim Allen	043f6a8b33	Update to v101r08 release. byuu says: Changelog: - 68K: fixed read-modify-write instructions - 68K: fixed ADDX bug (using wrong target) - 68K: fixed major bug with SUB using wrong argument ordering - 68K: fixed sign extension when reading address registers from effective addressing - 68K: fixed sign extension on CMPA, SUBA instructions - VDP: improved OAM sprite attribute table caching behavior - VDP: improved DMA fill operation behavior - added Master System / Game Gear stubs (needed for developing the Z80 core)	2016-08-17 22:31:22 +10:00
Tim Allen	3dd1aa9c1b	Update to v100r02 release. byuu says: Sigh ... I'm really not a good person. I'm inherently selfish. My responsibility and obligation right now is to work on loki, and then on the Tengai Makyou Zero translation, and then on improving the Famicom emulation. And yet ... it's not what I really want to do. That shouldn't matter; I should work on my responsibilities first. Instead, I'm going to be a greedy, self-centered asshole, and work on what I really want to instead. I'm really sorry, guys. I'm sure this will make a few people happy, and probably upset even more people. I'm also making zero guarantees that this ever gets finished. As always, I wish I could keep these things secret, so if I fail / give up, I could just drop it with no shame. But I would have to cut everyone out of the WIP process completely to make it happen. So, here goes ... This WIP adds the initial skeleton for Sega Mega Drive / Genesis emulation. God help us. (minor note: apparently the new extension for Mega Drive games is .md, neat. That's what I chose for the folders too. I thought it was .smd, so that'll be fixed in icarus for the next WIP.) (aside: this is why I wanted to get v100 out. I didn't want this code in a skeleton state in v100's source. Nor did I want really broken emulation, which the first release is sure to be, tarring said release.) ... So, basically, I've been ruminating on the legacy I want to leave behind with higan. 3D systems are just plain out. I'm never going to support them. They're too complex for my abilities, and they would run too slowly with my design style. I'm not willing to compromise my design ideals. And I would never want to play a 3D game system at native 240p/480i resolution ... but 1080p+ upscaling is not accurate, so that's a conflict I want to avoid entirely. It's also never going to emulate computer systems (X68K, PC-98, FM-Towns, etc) because holy shit that would completely destroy me. It's also never going emulate arcade machines. So I think of higan as a collection of 2D emulators for consoles and handhelds. I've gone over every major 2D gaming system there is, looking for ones with games I actually care about and enjoy. And I basically have five of those systems supported already. Looking at the remaining list, I see only three systems left that I have any interest in whatsoever: PC-Engine, Master System, Mega Drive. Again, I'm not in any way committing to emulating any of these, but ... if I had all of those in higan, I think I'd be content to really, truly, finally stop writing more emulators for the rest of my life. And so I decided to tackle the most difficult system first. If I'm successful, the Z80 core should cover a lot of the work on the SMS. And the HuC6280 should land somewhere between the NES and SNES in terms of difficulty ... closer to the NES. The systems that just don't appeal to me at all, which I will never touch, include, but are not limited to: * Atari 2600/5200/7800 * Lynx * Jaguar * Vectrex * Colecovision * Commodore 64 * Neo-Geo * Neo-Geo Pocket / Color * Virtual Boy * Super A'can * 32X * CD-i * etc, etc, etc. And really, even if something were mildly interesting in there ... we have to stop. I can't scale infinitely. I'm already way past my limit, but I'm doing this anyway. Too many cores bloats everything and kills quality on everything. I don't want higan to become MESS v2. I don't know what I'll do about the Famicom Disk System, PC-Engine CD, and Mega CD. I don't think I'll be able to achieve 60fps emulating the Mega CD, even if I tried to. I don't know what's going to happen here with even the Mega Drive. Maybe I'll get driven crazy with the documentation and quit. Maybe it'll end up being too complicated and I'll quit. Maybe the emulation will end up way too slow and I'll give up. Maybe it'll take me seven years to get any games playable at all. Maybe Steve Snake, AamirM and Mike Pavone will pool money to hire a hitman to come after me. Who knows. But this is what I want to do, so ... here goes nothing.	2016-07-09 14:21:37 +10:00
Tim Allen	a816998122	Update to v099r10 release. byuu says: Changelog: - higan/profile/ => higan/systems/ [temporary; unless we can't think of a better base folder name] - god-damn-better-have fixed the input polling bug - re-added command-line and drag-and-drop loading - command-line loading can now load multiple folders at once (SGB+GB game; Sufami Turbo+Slot A+Slot B; etc) - if you load just the base cart, it'll present you with a dialog to optionally load slotted cart(s) - MSU1 now goes through nall/vfs instead of directly accessing the filesystem - Famicom Cartridge, PPU cores updated to newer programming style - there's countless opportunity for BitField and .bits() in the PPU ... but I'm worried about breaking things If anyone has a working MSU1 game and can test the changes out, that'd be appreciated. I still don't have a test ROM on my dev box. I wouldn't worry too much about extensively testing the Famicom PPU changes just yet ... I'm still struggling with what to name the structs inside the classes between all of my emulators, and the BitField/.bits() changes will be much more important to test at a later date. The only use case left for Emulator::Interface::path(uint id) is for 21fx emulation. This peripheral loads a DLL/SO via LoadLibrary/dlopen, which do not have any official ways to open a file in RAM. I'm very hesitant to use the portable trick of writing the memory to a temporary file, loading it, and deleting the temporary file once done ... it's a real waste of disk activity. I might make something like vfs::file::isVirtual->bool,path()->string to get around this. But even once I do, the underlying LoadLibrary/dlopen call is still going to be direct disk access.	2016-06-26 18:54:12 +10:00

Author

SHA1

Message

Date

Tim Allen

043f6a8b33

Update to v101r08 release.

byuu says:

Changelog:

  - 68K: fixed read-modify-write instructions
  - 68K: fixed ADDX bug (using wrong target)
  - 68K: fixed major bug with SUB using wrong argument ordering
  - 68K: fixed sign extension when reading address registers from
    effective addressing
  - 68K: fixed sign extension on CMPA, SUBA instructions
  - VDP: improved OAM sprite attribute table caching behavior
  - VDP: improved DMA fill operation behavior
  - added Master System / Game Gear stubs (needed for developing the Z80
    core)

2016-08-17 22:31:22 +10:00

Tim Allen

3dd1aa9c1b

Update to v100r02 release.

byuu says:

Sigh ... I'm really not a good person. I'm inherently selfish.

My responsibility and obligation right now is to work on loki, and
then on the Tengai Makyou Zero translation, and then on improving the
Famicom emulation.

And yet ... it's not what I really want to do. That shouldn't matter;
I should work on my responsibilities first.

Instead, I'm going to be a greedy, self-centered asshole, and work on
what I really want to instead.

I'm really sorry, guys. I'm sure this will make a few people happy,
and probably upset even more people.

I'm also making zero guarantees that this ever gets finished. As always,
I wish I could keep these things secret, so if I fail / give up, I could
just drop it with no shame. But I would have to cut everyone out of the
WIP process completely to make it happen. So, here goes ...

This WIP adds the initial skeleton for Sega Mega Drive / Genesis
emulation. God help us.

(minor note: apparently the new extension for Mega Drive games is .md,
neat. That's what I chose for the folders too. I thought it was .smd,
so that'll be fixed in icarus for the next WIP.)

(aside: this is why I wanted to get v100 out. I didn't want this code in
a skeleton state in v100's source. Nor did I want really broken emulation,
which the first release is sure to be, tarring said release.)

...

So, basically, I've been ruminating on the legacy I want to leave behind
with higan. 3D systems are just plain out. I'm never going to support
them. They're too complex for my abilities, and they would run too slowly
with my design style. I'm not willing to compromise my design ideals. And
I would never want to play a 3D game system at native 240p/480i resolution
... but 1080p+ upscaling is not accurate, so that's a conflict I want
to avoid entirely. It's also never going to emulate computer systems
(X68K, PC-98, FM-Towns, etc) because holy shit that would completely
destroy me. It's also never going emulate arcade machines.

So I think of higan as a collection of 2D emulators for consoles
and handhelds. I've gone over every major 2D gaming system there is,
looking for ones with games I actually care about and enjoy. And I
basically have five of those systems supported already. Looking at the
remaining list, I see only three systems left that I have any interest
in whatsoever: PC-Engine, Master System, Mega Drive. Again, I'm not in
any way committing to emulating any of these, but ... if I had all of
those in higan, I think I'd be content to really, truly, finally stop
writing more emulators for the rest of my life.

And so I decided to tackle the most difficult system first. If I'm
successful, the Z80 core should cover a lot of the work on the SMS. And
the HuC6280 should land somewhere between the NES and SNES in terms of
difficulty ... closer to the NES.

The systems that just don't appeal to me at all, which I will never touch,
include, but are not limited to:
* Atari 2600/5200/7800
* Lynx
* Jaguar
* Vectrex
* Colecovision
* Commodore 64
* Neo-Geo
* Neo-Geo Pocket / Color
* Virtual Boy
* Super A'can
* 32X
* CD-i
* etc, etc, etc.

And really, even if something were mildly interesting in there ... we
have to stop. I can't scale infinitely. I'm already way past my limit,
but I'm doing this anyway. Too many cores bloats everything and kills
quality on everything. I don't want higan to become MESS v2.

I don't know what I'll do about the Famicom Disk System, PC-Engine CD,
and Mega CD. I don't think I'll be able to achieve 60fps emulating the
Mega CD, even if I tried to.

I don't know what's going to happen here with even the Mega Drive. Maybe
I'll get driven crazy with the documentation and quit. Maybe it'll end
up being too complicated and I'll quit. Maybe the emulation will end up
way too slow and I'll give up. Maybe it'll take me seven years to get
any games playable at all. Maybe Steve Snake, AamirM and Mike Pavone
will pool money to hire a hitman to come after me. Who knows.

But this is what I want to do, so ... here goes nothing.

2016-07-09 14:21:37 +10:00

Tim Allen

a816998122

Update to v099r10 release.

byuu says:

Changelog:
- higan/profile/ => higan/systems/ [temporary; unless we can't think of
  a better base folder name]
- god-damn-better-have fixed the input polling bug
- re-added command-line and drag-and-drop loading
  - command-line loading can now load multiple folders at once (SGB+GB
    game; Sufami Turbo+Slot A+Slot B; etc)
  - if you load just the base cart, it'll present you with a dialog to
    optionally load slotted cart(s)
- MSU1 now goes through nall/vfs instead of directly accessing the
  filesystem
- Famicom Cartridge, PPU cores updated to newer programming style
  - there's countless opportunity for BitField and .bits() in the PPU
    ... but I'm worried about breaking things

If anyone has a working MSU1 game and can test the changes out, that'd
be appreciated. I still don't have a test ROM on my dev box.

I wouldn't worry too much about extensively testing the Famicom PPU
changes just yet ... I'm still struggling with what to name the structs
inside the classes between all of my emulators, and the BitField/.bits()
changes will be much more important to test at a later date.

The only use case left for Emulator::Interface::path(uint id) is for
21fx emulation. This peripheral loads a DLL/SO via LoadLibrary/dlopen,
which do not have any official ways to open a file in RAM. I'm
very hesitant to use the portable trick of writing the memory to a
temporary file, loading it, and deleting the temporary file once done
... it's a real waste of disk activity. I might make something like
vfs::file::isVirtual->bool,path()->string to get around this. But even
once I do, the underlying LoadLibrary/dlopen call is still going to be
direct disk access.

2016-06-26 18:54:12 +10:00

3 Commits