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x68k: guess at scan rate for mode 25

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This commit is contained in:
cracyc 2023-09-07 14:59:53 -05:00
parent 224045e8ef
commit 92aa2bb483
1 changed files with 4 additions and 1 deletions
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5
src/mame/sharp/x68k_crtc.cpp
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@ -176,7 +176,7 @@ void x68k_crtc_device::refresh_mode()
// LOG("CRTC regs - %i %i %i %i - %i %i %i %i - %i - %i\n", m_reg[0], m_reg[1], m_reg[2], m_reg[3], // LOG("CRTC regs - %i %i %i %i - %i %i %i %i - %i - %i\n", m_reg[0], m_reg[1], m_reg[2], m_reg[3],
// m_reg[4], m_reg[5], m_reg[6], m_reg[7], m_reg[8], m_reg[9]); // m_reg[4], m_reg[5], m_reg[6], m_reg[7], m_reg[8], m_reg[9]);
int div; double div;
switch (m_reg[20] & 0x1f) switch (m_reg[20] & 0x1f)
{ {
case 0: case 0:
@ -198,6 +198,9 @@ void x68k_crtc_device::refresh_mode()
case 0x15: case 0x15:
div = 3; div = 3;
break; break;
case 0x19:
div = 1.5;
break;
} }
attotime refresh = attotime::from_hz((BIT(m_reg[20], 4) ? clock_69m() : clock_39m()) / div) * (scr.max_x * scr.max_y); attotime refresh = attotime::from_hz((BIT(m_reg[20], 4) ? clock_69m() : clock_39m()) / div) * (scr.max_x * scr.max_y);
LOG("screen().configure(%i,%i,[%i,%i,%i,%i],%f)\n", scr.max_x, scr.max_y, visiblescr.min_x, visiblescr.min_y, visiblescr.max_x, visiblescr.max_y, refresh.as_hz()); LOG("screen().configure(%i,%i,[%i,%i,%i,%i],%f)\n", scr.max_x, scr.max_y, visiblescr.min_x, visiblescr.min_y, visiblescr.max_x, visiblescr.max_y, refresh.as_hz());