Emulation/A7800DS
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Minor code refactor and cleanup.

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wavemotion-dave 2022-11-08 14:00:39 -05:00
parent eb2f263cd2
commit e739276662
2 changed files with 16 additions and 38 deletions
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A7800DS.nds
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54
arm9/source/emu/ProSystem.c
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@ -85,11 +85,12 @@ ITCM_CODE void prosystem_ExecuteFrame(const byte* input)
{
prosystem_cycles = 0;
if (maria_scanline & 0x10)
sally_Execute(HBLANK_BEFORE_DMA);
if (maria_scanline & 0x10) // Line 16 we start the rendering....
{
memory_ram[MSTAT] = 0;
framePtr = (word*)(maria_surface);
sally_Execute(HBLANK_BEFORE_DMA);
maria_RenderScanlineTOP( );
@ -98,10 +99,6 @@ ITCM_CODE void prosystem_ExecuteFrame(const byte* input)
prosystem_cycles += maria_cycles;
if(riot_and_wsync&2) riot_UpdateTimer( maria_cycles >> 2 );
}
else
{
sally_Execute(HBLANK_BEFORE_DMA);
}
sally_Execute(CYCLES_PER_SCANLINE);
@ -112,44 +109,22 @@ ITCM_CODE void prosystem_ExecuteFrame(const byte* input)
} else tia_Process(); // If all we have to deal with is the TIA, we can do so at 31KHz (or half that for DS LITE)
}
// ------------------------------------------------------------
// Up to line 25 is "off-screen" so we don't bother to render
// ------------------------------------------------------------
for (; maria_scanline < 25; maria_scanline++)
{
prosystem_cycles = 0;
sally_Execute(HBLANK_BEFORE_DMA);
maria_RenderScanline( );
// Cycle Stealing happens here... with a fudge adjustment...
if (maria_cycles > 0) maria_cycles += (int)myCartInfo.dma_adjust;
prosystem_cycles += maria_cycles;
if(riot_and_wsync&2) riot_UpdateTimer( maria_cycles >> 2 );
sally_Execute(CYCLES_PER_SCANLINE);
if(myCartInfo.pokeyType) // If pokey enabled, we process 1 pokey sample and 1 TIA sample. Good enough.
{
pokey_Process();
pokey_Scanline();
} else tia_Process(); // If all we have to deal with is the TIA, we can do so at 31KHz (or half that for DS LITE)
}
// -----------------------------------------------------------------------------------
// At line 25 we can start to render the scanlines if we are not skipping this frame.
// -----------------------------------------------------------------------------------
bRenderFrame = gTotalAtariFrames & frameSkipMask;
// ------------------------------------------------------------
// Now handle the REST of the display area...
// Now handle the Main display area...
// ------------------------------------------------------------
for (; maria_scanline < 258; maria_scanline++)
{
prosystem_cycles = 0;
if (maria_scanline == 247)
if (maria_scanline == 25)
{
// -----------------------------------------------------------------------------------
// At line 25 we can start to render the scanlines if we are not skipping this frame.
// -----------------------------------------------------------------------------------
bRenderFrame = gTotalAtariFrames & frameSkipMask;
}
else if (maria_scanline == 247)
{
bRenderFrame = 0; // At line 247 we can stop rendering frames...
}
@ -174,6 +149,9 @@ ITCM_CODE void prosystem_ExecuteFrame(const byte* input)
memory_ram[MSTAT] = 128;
// ---------------------------------------------------------------------------
// And at the bottom, we no longer have to render anything Maria-related...
// ---------------------------------------------------------------------------
for (; maria_scanline < 262; maria_scanline++)
{
prosystem_cycles = 0;