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x68k_crtc: increase clock divisor for mode 0x11 and fix hsync irq at the end of the frame

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This commit is contained in:
cracyc 2021-05-30 22:44:14 -05:00
parent 7044f909f9
commit cac74a7545
1 changed files with 9 additions and 3 deletions
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12
src/mame/video/x68k_crtc.cpp
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@ -196,6 +196,7 @@ void x68k_crtc_device::refresh_mode()
logerror("Invalid mode %d", m_reg[20] & 0x1f); [[fallthrough]];
case 1:
case 5:
case 0x11:
div = 4;
break;
case 0x16:
@ -204,7 +205,6 @@ void x68k_crtc_device::refresh_mode()
case 0x10:
div = 6;
break;
case 0x11:
case 0x15:
div = 3;
break;
@ -225,9 +225,9 @@ TIMER_CALLBACK_MEMBER(x68k_crtc_device::hsync)
if (m_operation & 8)
text_copy((m_reg[22] & 0xff00) >> 8, (m_reg[22] & 0x00ff), (m_reg[21] & 0xf));
int scan = screen().vpos();
if (hstate == 1)
{
int scan = screen().vpos();
hsync_time = screen().time_until_pos(scan, m_hend);
m_scanline_timer->adjust(hsync_time);
if ((scan != 0) && (scan < m_vend))
@ -235,7 +235,11 @@ TIMER_CALLBACK_MEMBER(x68k_crtc_device::hsync)
}
if (hstate == 0)
{
hsync_time = screen().time_until_pos(screen().vpos() + 1, m_hbegin);
if (scan == (m_vtotal - 1))
scan = 0;
else
scan++;
hsync_time = screen().time_until_pos(scan, m_hbegin);
m_scanline_timer->adjust(hsync_time, 1);
}
}
@ -434,6 +438,8 @@ u16 x68k_crtc_device::crtc_r(offs_t offset)
switch (offset)
{
case 9:
if (machine().side_effects_disabled())
return m_reg[9];
return 0;
case 10: // Text X/Y scroll
case 11: