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gameplan: Fix videoram readback, fixes MT#3067

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This commit is contained in:
Olivier Galibert 2021-06-07 23:03:31 +02:00
parent 7d65e376f0
commit 565e938c61
3 changed files with 5 additions and 1 deletions
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2
src/mame/drivers/gameplan.cpp
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@ -938,6 +938,7 @@ void gameplan_state::machine_start()
save_item(NAME(m_video_y)); save_item(NAME(m_video_y));
save_item(NAME(m_video_command)); save_item(NAME(m_video_command));
save_item(NAME(m_video_data)); save_item(NAME(m_video_data));
save_item(NAME(m_video_previous));
} }
@ -948,6 +949,7 @@ void gameplan_state::machine_reset()
m_video_y = 0; m_video_y = 0;
m_video_command = 0; m_video_command = 0;
m_video_data = 0; m_video_data = 0;
m_video_previous = 0;
} }
void gameplan_state::gameplan(machine_config &config) void gameplan_state::gameplan(machine_config &config)

1
src/mame/includes/gameplan.h
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@ -81,6 +81,7 @@ private:
uint8_t m_video_y; uint8_t m_video_y;
uint8_t m_video_command; uint8_t m_video_command;
uint8_t m_video_data; uint8_t m_video_data;
uint8_t m_video_previous;
/* devices */ /* devices */
optional_device<cpu_device> m_audiocpu; optional_device<cpu_device> m_audiocpu;

3
src/mame/video/gameplan.cpp
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@ -156,7 +156,7 @@ void gameplan_state::leprechn_video_command_w(uint8_t data)
uint8_t gameplan_state::leprechn_videoram_r() uint8_t gameplan_state::leprechn_videoram_r()
{ {
return m_videoram[m_video_y * (HBSTART - HBEND) + m_video_x]; return m_video_previous;
} }
@ -193,6 +193,7 @@ WRITE_LINE_MEMBER(gameplan_state::video_command_trigger_w)
m_video_y = m_video_y + 1; m_video_y = m_video_y + 1;
} }
m_video_previous = m_videoram[m_video_y * (HBSTART - HBEND) + m_video_x];
m_videoram[m_video_y * (HBSTART - HBEND) + m_video_x] = m_video_data & 0x0f; m_videoram[m_video_y * (HBSTART - HBEND) + m_video_x] = m_video_data & 0x0f;
break; break;