diff options
Diffstat (limited to 'source/dma.c')
| -rw-r--r-- | source/dma.c | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/source/dma.c b/source/dma.c index 6bc7922..58aa2f1 100644 --- a/source/dma.c +++ b/source/dma.c @@ -39,7 +39,7 @@ void S9xDoDMA(uint8_t Channel) d = &DMA[Channel]; count = d->TransferBytes; - // Prepare for custom chip DMA + /* Prepare for custom chip DMA */ if (count == 0) count = 0x10000; @@ -48,9 +48,9 @@ void S9xDoDMA(uint8_t Channel) if ((d->ABank == 0x7E || d->ABank == 0x7F) && d->BAddress == 0x80 && !d->TransferDirection) { d->AAddress += d->TransferBytes; - // Does an invalid DMA actually take time? - // I'd say yes, since 'invalid' is probably just the WRAM chip - // not being able to read and write itself at the same time + /* Does an invalid DMA actually take time? + * I'd say yes, since 'invalid' is probably just the WRAM chip + * not being able to read and write itself at the same time */ CPU.Cycles += (d->TransferBytes + 1) * SLOW_ONE_CYCLE; goto update_address; } @@ -67,8 +67,8 @@ void S9xDoDMA(uint8_t Channel) if (d->AAddressFixed && Memory.FillRAM [0x4801] > 0) { uint8_t* in_ptr; - // XXX: Should probably verify that we're DMAing from ROM? - // And somewhere we should make sure we're not running across a mapping boundary too. + /* XXX: Should probably verify that we're DMAing from ROM? + * And somewhere we should make sure we're not running across a mapping boundary too. */ inc = !d->AAddressDecrement ? 1 : -1; in_ptr = GetBasePointer(((d->ABank << 16) | d->AAddress)); @@ -96,8 +96,8 @@ void S9xDoDMA(uint8_t Channel) } if (d->BAddress == 0x18 && SA1.in_char_dma && (d->ABank & 0xf0) == 0x40) { - // Perform packed bitmap to PPU character format conversion on the - // data before transmitting it to V-RAM via-DMA. + /* Perform packed bitmap to PPU character format conversion on the + * data before transmitting it to V-RAM via-DMA. */ int32_t i; int32_t num_chars = 1 << ((Memory.FillRAM [0x2231] >> 2) & 7); int32_t depth = (Memory.FillRAM [0x2231] & 3) == 0 ? 8 : (Memory.FillRAM [0x2231] & 3) == 1 ? 4 : 2; @@ -219,7 +219,7 @@ void S9xDoDMA(uint8_t Channel) * XXX: PPU->PPU transfers don't work). */ - //reflects extra cycle used by DMA + /* reflects extra cycle used by DMA */ CPU.Cycles += SLOW_ONE_CYCLE * (count + 1); base = GetBasePointer((d->ABank << 16) + d->AAddress); @@ -332,7 +332,7 @@ void S9xDoDMA(uint8_t Channel) { if (d->BAddress == 0x18) { - // Write to V-RAM + /* Write to V-RAM */ IPPU.FirstVRAMRead = true; if (!PPU.VMA.FullGraphicCount) { @@ -375,7 +375,7 @@ void S9xDoDMA(uint8_t Channel) } else { - // DMA mode 1 general case + /* DMA mode 1 general case */ while (count > 1) { Work = *(base + p); @@ -553,11 +553,11 @@ void S9xDoDMA(uint8_t Channel) free(spc7110_dma); update_address: - // Super Punch-Out requires that the A-BUS address be updated after the DMA transfer. + /* Super Punch-Out requires that the A-BUS address be updated after the DMA transfer. */ Memory.FillRAM[0x4302 + (Channel << 4)] = (uint8_t) d->AAddress; Memory.FillRAM[0x4303 + (Channel << 4)] = d->AAddress >> 8; - // Secret of the Mana requires that the DMA bytes transfer count be set to zero when DMA has completed. + /* Secret of Mana requires that the DMA bytes transfer count be set to zero when DMA has completed. */ Memory.FillRAM [0x4305 + (Channel << 4)] = 0; Memory.FillRAM [0x4306 + (Channel << 4)] = 0; @@ -605,8 +605,8 @@ uint8_t S9xDoHDMA(uint8_t byte) if (!p->LineCount) { uint8_t line; - //remember, InDMA is set. - //Get/Set incur no charges! + /* remember, InDMA is set. + * Get/Set incur no charges! */ CPU.Cycles += SLOW_ONE_CYCLE; line = S9xGetByte((p->ABank << 16) + p->Address); @@ -621,8 +621,8 @@ uint8_t S9xDoHDMA(uint8_t byte) p->LineCount = line & 0x7f; } - // Disable H-DMA'ing into V-RAM (register 2118) for Hook - /* XXX: instead of p->BAddress == 0x18, make S9xSetPPU fail + /* Disable H-DMA'ing into V-RAM (register 2118) for Hook + * XXX: instead of p->BAddress == 0x18, make S9xSetPPU fail * XXX: writes to $2118/9 when appropriate */ if (!p->LineCount || p->BAddress == 0x18) @@ -639,7 +639,7 @@ uint8_t S9xDoHDMA(uint8_t byte) if (p->HDMAIndirectAddressing) { p->IndirectBank = Memory.FillRAM [0x4307 + (d << 4)]; - //again, no cycle charges while InDMA is set! + /* again, no cycle charges while InDMA is set! */ CPU.Cycles += SLOW_ONE_CYCLE << 2; p->IndirectAddress = S9xGetWord((p->ABank << 16) + p->Address); p->Address += 2; |