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// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic
/***************************************************************************
Pecom driver by Miodrag Milanovic
08/11/2008 Preliminary driver.
****************************************************************************/
#include "emu.h"
#include "includes/pecom.h"
#include "sound/wave.h"
#include "speaker.h"
WRITE8_MEMBER(pecom_state::pecom_cdp1869_w)
{
uint16_t ma = m_cdp1802->get_memory_address();
switch (offset + 3)
{
case 3:
m_cdp1869->out3_w(space, ma, data);
break;
case 4:
m_cdp1869->out4_w(space, ma, data);
break;
case 5:
m_cdp1869->out5_w(space, ma, data);
break;
case 6:
m_cdp1869->out6_w(space, ma, data);
break;
case 7:
m_cdp1869->out7_w(space, ma, data);
break;
}
}
void pecom_state::cdp1869_page_ram(address_map &map)
{
map(0x000, 0x3ff).mirror(0x400).ram();
}
CDP1869_CHAR_RAM_READ_MEMBER(pecom_state::pecom_char_ram_r )
{
uint8_t column = pmd & 0x7f;
uint16_t charaddr = (column << 4) | cma;
return m_charram[charaddr];
}
CDP1869_CHAR_RAM_WRITE_MEMBER(pecom_state::pecom_char_ram_w )
{
uint8_t column = pmd & 0x7f;
uint16_t charaddr = (column << 4) | cma;
m_charram[charaddr] = data;
}
CDP1869_PCB_READ_MEMBER(pecom_state::pecom_pcb_r )
{
return BIT(pmd, 7);
}
WRITE_LINE_MEMBER(pecom_state::pecom_prd_w)
{
// every other PRD triggers a DMAOUT request
if (m_dma)
{
m_cdp1802->set_input_line(COSMAC_INPUT_LINE_DMAOUT, HOLD_LINE);
}
m_dma = !m_dma;
}
void pecom_state::video_start()
{
/* allocate memory */
m_charram = std::make_unique<uint8_t[]>(PECOM_CHAR_RAM_SIZE);
/* register for state saving */
save_item(NAME(m_reset));
save_item(NAME(m_dma));
save_pointer(NAME(m_charram), PECOM_CHAR_RAM_SIZE);
}
void pecom_state::pecom_video(machine_config &config)
{
SPEAKER(config, "mono").front_center();
CDP1869(config, m_cdp1869, cdp1869_device::DOT_CLK_PAL, &pecom_state::cdp1869_page_ram);
m_cdp1869->add_pal_screen(config, SCREEN_TAG, cdp1869_device::DOT_CLK_PAL);
m_cdp1869->set_color_clock(cdp1869_device::COLOR_CLK_PAL);
m_cdp1869->set_pcb_read_callback(FUNC(pecom_state::pecom_pcb_r));
m_cdp1869->set_char_ram_read_callback(FUNC(pecom_state::pecom_char_ram_r));
m_cdp1869->set_char_ram_write_callback(FUNC(pecom_state::pecom_char_ram_w));
m_cdp1869->pal_ntsc_callback().set_constant(1);
m_cdp1869->prd_callback().set(FUNC(pecom_state::pecom_prd_w));
m_cdp1869->add_route(ALL_OUTPUTS, "mono", 0.25);
WAVE(config, "wave", "cassette").add_route(ALL_OUTPUTS, "mono", 0.25);
}
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