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docastle.cpp: Clarify reset behavior (nw)

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This commit is contained in:
AJR 2017-06-29 08:53:09 -04:00
parent 150ffecbdb
commit be0bdba541
3 changed files with 13 additions and 7 deletions
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8
src/mame/drivers/docastle.cpp
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@ -550,6 +550,14 @@ void docastle_state::machine_reset()
m_adpcm_pos = m_adpcm_idle = 0; m_adpcm_pos = m_adpcm_idle = 0;
m_adpcm_data = -1; m_adpcm_data = -1;
m_adpcm_status = 0; m_adpcm_status = 0;
for (i = 0; i < 2; i++)
{
m_inp[i]->write_ms(0); // pin 5 tied low
//m_inp[i]->write_ce(1); // pin 4 tied high
m_inp[i]->write_s(machine().dummy_space(), 0, 0); // cleared with LS273
}
flip_screen_set(0); // cleared with LS273
} }
void docastle_state::machine_start() void docastle_state::machine_start()

6
src/mame/includes/docastle.h
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@ -20,8 +20,7 @@ public:
m_cpu3(*this, "cpu3"), m_cpu3(*this, "cpu3"),
m_crtc(*this, "crtc"), m_crtc(*this, "crtc"),
m_msm(*this, "msm"), m_msm(*this, "msm"),
m_inp1(*this, "inp1"), m_inp(*this, "inp%u", 1),
m_inp2(*this, "inp2"),
m_videoram(*this, "videoram"), m_videoram(*this, "videoram"),
m_colorram(*this, "colorram"), m_colorram(*this, "colorram"),
m_spriteram(*this, "spriteram"), m_spriteram(*this, "spriteram"),
@ -35,8 +34,7 @@ public:
required_device<cpu_device> m_cpu3; required_device<cpu_device> m_cpu3;
required_device<h46505_device> m_crtc; required_device<h46505_device> m_crtc;
optional_device<msm5205_device> m_msm; optional_device<msm5205_device> m_msm;
required_device<tms1025_device> m_inp1; required_device_array<tms1025_device, 2> m_inp;
required_device<tms1025_device> m_inp2;
/* memory pointers */ /* memory pointers */
required_shared_ptr<uint8_t> m_videoram; required_shared_ptr<uint8_t> m_videoram;

6
src/mame/video/docastle.cpp
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@ -79,12 +79,12 @@ WRITE8_MEMBER(docastle_state::docastle_colorram_w)
READ8_MEMBER(docastle_state::inputs_flipscreen_r) READ8_MEMBER(docastle_state::inputs_flipscreen_r)
{ {
// inputs pass through LS244 non-inverting buffer // inputs pass through LS244 non-inverting buffer
uint8_t buf = (m_inp2->read_h(space, 0) << 4) | m_inp1->read_h(space, 0); uint8_t buf = (m_inp[1]->read_h(space, 0) << 4) | m_inp[0]->read_h(space, 0);
// LS273 latches address bits on rising edge of address decode // LS273 latches address bits on rising edge of address decode
flip_screen_set(BIT(offset, 7)); flip_screen_set(BIT(offset, 7));
m_inp1->write_s(space, 0, offset & 7); m_inp[0]->write_s(space, 0, offset & 7);
m_inp2->write_s(space, 0, offset & 7); m_inp[1]->write_s(space, 0, offset & 7);
return buf; return buf;
} }