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in207376: Fix NMI hookup [Dirk Best, charcole]

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This commit is contained in:
Dirk Best 2020-09-17 14:22:38 +02:00
parent eb3d3ccb50
commit 3f0562be18
1 changed files with 9 additions and 16 deletions
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25
src/mame/drivers/informer_207_376.cpp
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@ -18,7 +18,6 @@
- Problably needs improvements to at least the Z80SCC to
properly support synchrous modes
- Figure out the unknown bits at 0x8400
- Verify NMI hookup
- Verify clock speeds
Notes:
@ -31,8 +30,8 @@
#include "cpu/m6809/m6809.h"
#include "machine/6850acia.h"
#include "machine/pit8253.h"
#include "machine/clock.h"
#include "machine/input_merger.h"
#include "machine/ripple_counter.h"
#include "machine/x2212.h"
#include "machine/z80scc.h"
#include "video/mc6845.h"
@ -95,7 +94,6 @@ private:
uint8_t novram_recall_r();
MC6845_UPDATE_ROW(crtc_update_row);
void vsync_w(int state);
};
@ -135,19 +133,10 @@ INPUT_PORTS_END
void informer_207_376_state::crt_brightness_w(uint8_t data)
{
// unknown algorithm for the brightness
// default value is 4, range is 0 (off) to 15 (brightest)
// default value is 6, range is 0 (off) to 15 (brightest)
m_screen->set_brightness(256 - (256 / ((data & 0x0f) + 1)));
}
void informer_207_376_state::vsync_w(int state)
{
if (state)
{
m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE);
m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE);
}
}
MC6845_UPDATE_ROW( informer_207_376_state::crtc_update_row )
{
const pen_t *pen = m_palette->pens();
@ -255,8 +244,8 @@ void informer_207_376_state::informer_207_376(machine_config &config)
input_merger_device &cpu_irq(INPUT_MERGER_ANY_HIGH(config, "cpu_irq"));
cpu_irq.output_handler().set_inputline(m_maincpu, M6809_IRQ_LINE);
X2212(config, "novram0");
X2212(config, "novram1");
X2212(config, m_novram[0]);
X2212(config, m_novram[1]);
PIT8253(config, m_pit);
m_pit->set_clk<0>(2.457600_MHz_XTAL);
@ -265,6 +254,11 @@ void informer_207_376_state::informer_207_376(machine_config &config)
m_pit->set_clk<1>(2.457600_MHz_XTAL);
m_pit->out_handler<1>().set(m_acia[0], FUNC(acia6850_device::write_txc));
m_pit->out_handler<1>().append(m_acia[0], FUNC(acia6850_device::write_rxc));
m_pit->out_handler<1>().append("nmi_clk", FUNC(ripple_counter_device::clock_w));
ripple_counter_device &nmi_clk(RIPPLE_COUNTER(config, "nmi_clk")); // CD4020BE
nmi_clk.set_stages(14);
nmi_clk.count_out_cb().set_inputline(m_maincpu, INPUT_LINE_NMI).bit(13); // Q14
SCC85C30(config, m_scc, 0); // externally clocked?
m_scc->out_txda_callback().set("com1", FUNC(rs232_port_device::write_txd));
@ -314,7 +308,6 @@ void informer_207_376_state::informer_207_376(machine_config &config)
m_crtc->set_show_border_area(false);
m_crtc->set_char_width(8);
m_crtc->set_update_row_callback(FUNC(informer_207_376_state::crtc_update_row));
m_crtc->out_vsync_callback().set(FUNC(informer_207_376_state::vsync_w));
// sound
SPEAKER(config, "mono").front_center();