byuu says:
Changelog:
- processor/spc700: restored fetch/load/store/pull/push shorthand
functions
- processor/spc700: split functions that tested the algorithm used (`op
!= &SPC700:...`) to separate instructions
- mostly for code clarity over code size: it was awkward having
cycle counts change based on a function parameter
- processor/spc700: implemented Overload's new findings on which
cycles are truly internal (no bus reads)
- sfc/smp: TEST register emulation has been vastly improved¹
¹: it turns out that TEST.d4,d5 is the external clock divider (used
when accessing RAM through the DSP), and TEST.d6,d7 is the internal
clock divider (used when accessing IPLROM, IO registers, or during idle
cycles.)
The DSP (24576khz) feeds its clock / 12 through to the SMP (2048khz).
The clock divider setting further divides the clock by 2, 4, 8, or 16.
Since 8 and 16 are not cleanly divislbe by 12, the SMP cycle count
glitches out and seems to take 10 and 2 clocks instead of 8 or 16. This
can on real hardware either cause the SMP to run very slowly, or more
likely, crash the SMP completely until reset.
What's even stranger is the timers aren't affected by this. They still
clock by 2, 4, 8, or 16.
Note that technically I could divide my own clock counters by 24 and
reduce these to {1,2,5,10} and {1,2,4,8}, I instead chose to divide by
12 to better illustrate this hardware issue and better model that the
SMP clock runs at 2048khz and not 1024khz.
Further, note that things aren't 100% perfect yet. This seems to throw
off some tests, such as blargg's `test_timer_speed`. I can't tell how
far off I am because blargg's test tragically doesn't print out fail
values. But you can see the improvements in that higan is now passing
all of Revenant's tests that were obviously completely wrong before.
byuu says:
Changelog:
- md/ym2612: initialize DAC sample to center volume [Cydrak]
- processor/arm: add accumulate mode extra cycle to mlal [Jonas
Quinn]
- processor/huc6280: split off algorithms, improve naming of functions
- processor/mos6502: split off algorithms
- processor/spc700: major revamp of entire core (~50% completed)
- processor/wdc65816: fixed several bugs introduced by rewrite
For the SPC700, this turns out to be very old code as well, with global
object state variables, those annoying `{Boolean,Natural}BitField` types,
`under_case` naming conventions, heavily abbreviated function names, etc.
I'm working to get the code to be in the same design as the MOS6502,
HuC6280, WDC65816 cores, since they're all extremely similar in terms of
architectural design (the SPC700 is more of an off-label
reimplementation of a 6502 core, but still.)
The main thing left is that about 90% of the actual instructions still
need to be adapted to not use the internal state (`aa`, `rd`, `dp`,
`sp`, `bit` variables.) I wanted to finish this today, but ran out of
time before work.
I wouldn't suggest too much testing just yet. We should wait until the
SPC700 core is finished for that. However, if some does want to and
spots regressions, please let me know.
byuu says:
Changelog:
- restructured the project and removed a whole bunch of old/dead
directives from higan/GNUmakefile
- huge amounts of work on hiro/cocoa (compiles but ~70% of the
functionality is commented out)
- fixed a masking error in my ARM CPU disassembler [Lioncash]
- SFC: decided to change board cic=(411,413) back to board
region=(ntsc,pal) ... the former was too obtuse
If you rename Boolean (it's a problem with an include from ruby, not
from hiro) and disable all the ruby drivers, you can compile an
OS X binary, but obviously it's not going to do anything.
It's a boring WIP, I just wanted to push out the project structure
change now at the start of this WIP cycle.
byuu says:
Changelog:
- added Cocoa target: higan can now be compiled for OS X Lion
[Cydrak, byuu]
- SNES/accuracy profile hires color blending improvements - fixes
Marvelous text [AWJ]
- fixed a slight bug in SNES/SA-1 VBR support caused by a typo
- added support for multi-pass shaders that can load external textures
(requires OpenGL 3.2+)
- added game library path (used by ananke->Import Game) to
Settings->Advanced
- system profiles, shaders and cheats database can be stored in "all
users" shared folders now (eg /usr/share on Linux)
- all configuration files are in BML format now, instead of XML (much
easier to read and edit this way)
- main window supports drag-and-drop of game folders (but not game files
/ ZIP archives)
- audio buffer clears when entering a modal loop on Windows (prevents
audio repetition with DirectSound driver)
- a substantial amount of code clean-up (probably the biggest
refactoring to date)
One highly desired target for this release was to default to the optimal
drivers instead of the safest drivers, but because AMD drivers don't
seem to like my OpenGL 3.2 driver, I've decided to postpone that. AMD
has too big a market share. Hopefully with v093 officially released, we
can get some public input on what AMD doesn't like.
byuu says:
Basically just a project rename, with s/bsnes/higan and the new icon
from lowkee added in.
It won't compile on Windows because I forgot to update the resource.rc
file, and a path transform command isn't working on Windows.
It was really just meant as a starting point, so that v091 WIPs can flow
starting from .00 with the new name (it overshadows bsnes v091, so
publicly speaking this "shouldn't exist" and will probably be deleted
from Google Code when v092 is ready.)
Tim Allen