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sed1330: Calculate frame rate for LCD screen (nw)

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pc8401a: Derive clocks from XTAL (might well be different for pc8500, so not used there) (nw)
This commit is contained in:
AJR 2019-10-15 02:09:30 -04:00
parent 0a72dcb2e0
commit d9905f3d03
3 changed files with 10 additions and 3 deletions
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7
src/devices/video/sed1330.cpp
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@ -8,6 +8,7 @@
#include "emu.h"
#include "sed1330.h"
#include "screen.h"
//#define VERBOSE 1
#include "logmacro.h"
@ -383,6 +384,12 @@ WRITE8_MEMBER( sed1330_device::data_w )
case 5:
m_lf = data + 1;
LOG("SED1330 Frame Height: %u\n", m_lf);
if (clock() != 0)
{
attotime fr = clocks_to_attotime(m_tcr * m_lf * 9);
screen().configure(m_tcr * m_fx, m_lf, screen().visible_area(), fr.as_attoseconds());
LOG("SED1330 Frame Rate: %.1f Hz\n", fr.as_hz());
}
break;
case 6:

2
src/mame/drivers/pc8401a.cpp
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@ -573,7 +573,7 @@ WRITE8_MEMBER( pc8401a_state::ppi_pc_w )
void pc8401a_state::pc8401a(machine_config &config)
{
/* basic machine hardware */
Z80(config, m_maincpu, 4000000); // NEC uPD70008C
Z80(config, m_maincpu, 7.987_MHz_XTAL / 2); // NEC uPD70008C
m_maincpu->set_addrmap(AS_PROGRAM, &pc8401a_state::pc8401a_mem);
m_maincpu->set_addrmap(AS_IO, &pc8401a_state::pc8401a_io);

4
src/mame/video/pc8401a.cpp
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@ -72,7 +72,7 @@ void pc8401a_state::pc8401a_video(machine_config &config)
m_screen_lcd->set_visarea(0, 480-1, 0, 128-1);
m_screen_lcd->set_palette("palette");
SED1330(config, m_lcdc, 0);
SED1330(config, m_lcdc, 7.987_MHz_XTAL);
m_lcdc->set_screen(m_screen_lcd);
m_lcdc->set_addrmap(0, &pc8401a_state::pc8401a_lcdc);
}
@ -91,7 +91,7 @@ void pc8500_state::pc8500_video(machine_config &config)
m_screen_lcd->set_visarea(0, 480-1, 0, 200-1);
m_screen_lcd->set_palette("palette");
SED1330(config, m_lcdc, 0);
SED1330(config, m_lcdc, 8000000);
m_lcdc->set_screen(SCREEN_TAG);
m_lcdc->set_addrmap(0, &pc8500_state::pc8500_lcdc);