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snes.cpp: partial revert DMA cycle function (#9300)

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cam900 2022-02-15 22:31:17 +09:00 committed by GitHub
parent 77dcffc162
commit 25c99d9450
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1 changed files with 2 additions and 2 deletions
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src/mame/machine/snes.cpp
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@ -1222,7 +1222,7 @@ inline int snes_state::dma_abus_valid( uint32_t address )
inline uint8_t snes_state::abus_read( address_space &space, uint32_t abus )
{
m_maincpu->adjust_icount(-8); // 8 master cycle per memory access
// m_maincpu->adjust_icount(-8); // 8 master cycle per memory access
if (!dma_abus_valid(abus))
return 0;
@ -1233,7 +1233,7 @@ inline void snes_state::dma_transfer( address_space &space, uint8_t dma, uint32_
{
if (m_dma_channel[dma].dmap & 0x80) /* PPU->CPU */
{
m_maincpu->adjust_icount(-8); // 8 master cycle per memory access
// m_maincpu->adjust_icount(-8); // 8 master cycle per memory access
if (bbus == 0x2180 && ((abus & 0xfe0000) == 0x7e0000 || (abus & 0x40e000) == 0x0000))
{
//illegal WRAM->WRAM transfer (bus conflict)