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tatsumi.cpp: road ctrl notes (nw)

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angelosa 2018-05-29 17:19:27 +02:00
parent 6a15c5b88f
commit 85a0368061
1 changed files with 7 additions and 3 deletions
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10
src/mame/machine/tatsumi.cpp
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@ -209,13 +209,17 @@ WRITE16_MEMBER(roundup5_state::roundup5_control_w)
WRITE16_MEMBER(roundup5_state::road_vregs_w)
{
/* Bit 0x10 is road bank select,
Bit 0x100 is used, but unknown
/*
---- ---x ---- ---- enabled when there's a road slope of any kind, unknown purpose
---- ---- -xx- ---- enables alternatively in tunnels sometimes, color mods?
---- ---- ---x ---- road bank select
---- ---- ---- xxxx various values written during POST while accessing road pixel ram,
otherwise 0xb at the start of irq service
*/
COMBINE_DATA(&m_road_vregs[offset]);
m_subcpu->set_input_line(INPUT_LINE_IRQ4, CLEAR_LINE); // guess, probably wrong
m_subcpu->set_input_line(INPUT_LINE_IRQ4, CLEAR_LINE); // guess, probably wrong
// logerror("d_68k_e0000_w %s %04x\n", m_maincpu->pc(), data);
}