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Guessed m68k enable/disable

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This commit is contained in:
Angelo Salese 2013-02-20 01:00:31 +00:00
parent 954c801a0a
commit 7ff0d21610
1 changed files with 12 additions and 19 deletions
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31
src/mame/drivers/coolridr.c
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@ -486,24 +486,22 @@ WRITE32_MEMBER(coolridr_state::sysh1_unk_w)
address_space &main_space = m_maincpu->space(AS_PROGRAM);
address_space &sound_space = m_soundcpu->space(AS_PROGRAM);
//printf("%08x %08x\n",offset*4,m_h1_unk[offset]);
if(offset == 8)
{
//bit 16 probably halts m68k
//probably writing to upper word disables m68k, to lower word enables it
machine().device("soundcpu")->execute().set_input_line(INPUT_LINE_RESET, (data) ? ASSERT_LINE : CLEAR_LINE);
return;
}
if(offset == 2)
{
if(!(data & 1) && (m_h1_unk[2] & 1)) // 1 -> 0 transition enables DMA
if(data & 1 && (!(m_h1_unk[2] & 1))) // 0 -> 1 transition enables DMA
{
UINT32 src = m_h1_unk[0];
UINT32 dst = m_h1_unk[1];
UINT32 size = 0x200; // TODO
if(src == 0x100000) // DMA for m68k program, TODO
return;
//printf("%08x %08x %08x\n",src,dst,size);
UINT32 size = (m_h1_unk[2]>>16)*0x40;
for(int i = 0;i < size; i+=2)
{
@ -516,16 +514,13 @@ WRITE32_MEMBER(coolridr_state::sysh1_unk_w)
if(offset == 6)
{
if(!(data & 1) && (m_h1_unk[6] & 1)) // 1 -> 0 transition enables DMA
if(data & 1 && (!(m_h1_unk[6] & 1))) // 0 -> 1 transition enables DMA
{
UINT32 src = m_h1_unk[4];
UINT32 dst = m_h1_unk[5];
UINT32 size = 0x200; // TODO
UINT32 size = (m_h1_unk[6]>>16)*0x40;
if(src == 0x100000) // DMA for m68k program, TODO
return;
//printf("%08x %08x %08x\n",src,dst,size);
//printf("%08x %08x %08x %02x\n",src,dst,size,sound_data);
for(int i = 0;i < size; i+=2)
{
@ -538,7 +533,6 @@ WRITE32_MEMBER(coolridr_state::sysh1_unk_w)
COMBINE_DATA(&m_h1_unk[offset]);
//printf("%08x %08x\n",offset*4,m_h1_unk[offset]);
}
@ -1485,11 +1479,10 @@ void coolridr_state::machine_start()
void coolridr_state::machine_reset()
{
// machine().device("maincpu")->execute().set_input_line(INPUT_LINE_HALT, ASSERT_LINE);
// machine().device("soundcpu")->execute().set_input_line(INPUT_LINE_HALT, ASSERT_LINE);
memcpy(m_soundram, memregion("soundcpu")->base()+0x80000, 0x80000);
m_soundcpu->reset();
machine().device("soundcpu")->execute().set_input_line(INPUT_LINE_RESET, ASSERT_LINE);
// memcpy(m_soundram, memregion("soundcpu")->base()+0x80000, 0x80000);
// m_soundcpu->reset();
}