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dm3270: Revert to 50 Hz setting; correct baud clock hookup (nw)

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This commit is contained in:
AJR 2020-06-12 21:35:11 -04:00
parent 422b8c81c0
commit 866b87fb0e
1 changed files with 5 additions and 7 deletions
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12
src/mame/drivers/microb.cpp
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@ -313,13 +313,11 @@ void microb_state::microb(machine_config &config)
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER, rgb_t::green()));
screen.set_refresh_hz(60);
screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
screen.set_raw(1'620'000 * 8, 800, 0, 640, 324, 0, 300);
//screen.set_raw(1'620'000 * 8, 800, 0, 640, 270, 0, 250);
screen.set_screen_update("crtc", FUNC(i8275_device::screen_update));
screen.set_size(640, 250);
screen.set_visarea(0, 639, 0, 249);
i8275_device &crtc(I8275(config, "crtc", 1'944'000)); // calculated for 60 Hz operation
i8275_device &crtc(I8275(config, "crtc", 1'620'000));
crtc.set_screen("screen");
crtc.set_character_width(8);
crtc.set_display_callback(FUNC(microb_state::draw_character));
@ -336,14 +334,14 @@ void microb_state::microb(machine_config &config)
pit8253_device &pit1(PIT8253(config, "pit1"));
pit1.set_clk<2>(1'536'000);
pit1.out_handler<2>().set(m_usart[0], FUNC(i8251_device::write_rxc));
pit1.out_handler<2>().set(m_usart[1], FUNC(i8251_device::write_rxc));
pit8253_device &pit2(PIT8253(config, "pit2"));
pit2.set_clk<0>(1'536'000);
pit2.set_clk<1>(1'536'000);
pit2.set_clk<2>(1'536'000);
pit2.out_handler<0>().set(m_usart[0], FUNC(i8251_device::write_txc));
pit2.out_handler<1>().set(m_usart[1], FUNC(i8251_device::write_rxc));
pit2.out_handler<1>().set(m_usart[0], FUNC(i8251_device::write_rxc));
pit2.out_handler<2>().set(m_usart[1], FUNC(i8251_device::write_txc));
SPEAKER(config, "mono").front_center();