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apple2gs: fix $C034 readback and some uninitialized variables. [R. Belmont]

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This commit is contained in:
arbee 2021-12-20 12:20:28 -05:00
parent fab3259f43
commit 3f0526942f
1 changed files with 5 additions and 2 deletions
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7
src/mame/drivers/apple2gs.cpp
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@ -1482,6 +1482,9 @@ void apple2gs_state::machine_reset()
m_page2 = false;
m_romswitch = false;
m_video->m_page2 = false;
m_video->m_GSborder = 0x02;
m_video->m_GSbg = 0x02;
m_video->m_GSfg = 0x0f;
m_an0 = m_an1 = m_an2 = m_an3 = false;
m_gameio->an0_w(0);
m_gameio->an1_w(0);
@ -2505,7 +2508,7 @@ u8 apple2gs_state::c000_r(offs_t offset)
return m_clkdata;
case 0x34: // BORDERCOL
return m_clock_control;
return (m_clock_control & 0xf0) | (m_video->m_GSborder & 0xf);
case 0x35: // SHADOW
return m_shadow;
@ -2888,7 +2891,7 @@ void apple2gs_state::c000_w(offs_t offset, u8 data)
break;
case 0x34: // CLOCKCTL
if ((data & 0xf) != m_video->m_GSborder)
if ((data & 0xf) != (m_video->m_GSborder & 0xf))
{
m_screen->update_now();
}