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/***************************************************************************
Pecom driver by Miodrag Milanovic
08/11/2008 Preliminary driver.
****************************************************************************/
#include "emu.h"
#include "sound/cdp1869.h"
#include "sound/wave.h"
#include "cpu/cosmac/cosmac.h"
#include "includes/pecom.h"
WRITE8_MEMBER(pecom_state::pecom_cdp1869_w)
{
UINT16 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;
}
}
static ADDRESS_MAP_START( cdp1869_page_ram, AS_0, 8, driver_device )
AM_RANGE(0x000, 0x3ff) AM_MIRROR(0x400) AM_RAM
ADDRESS_MAP_END
static CDP1869_CHAR_RAM_READ( pecom_char_ram_r )
{
pecom_state *state = device->machine().driver_data<pecom_state>();
UINT8 column = pmd & 0x7f;
UINT16 charaddr = (column << 4) | cma;
return state->m_charram[charaddr];
}
static CDP1869_CHAR_RAM_WRITE( pecom_char_ram_w )
{
pecom_state *state = device->machine().driver_data<pecom_state>();
UINT8 column = pmd & 0x7f;
UINT16 charaddr = (column << 4) | cma;
state->m_charram[charaddr] = data;
}
static CDP1869_PCB_READ( 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;
}
static CDP1869_INTERFACE( pecom_cdp1869_intf )
{
SCREEN_TAG,
CDP1869_COLOR_CLK_PAL,
CDP1869_PAL,
pecom_pcb_r,
pecom_char_ram_r,
pecom_char_ram_w,
DEVCB_DRIVER_LINE_MEMBER(pecom_state,pecom_prd_w)
};
VIDEO_START_MEMBER(pecom_state,pecom)
{
/* allocate memory */
m_charram = auto_alloc_array(machine(), UINT8, 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);
}
MACHINE_CONFIG_FRAGMENT( pecom_video )
MCFG_CDP1869_SCREEN_PAL_ADD(CDP1869_TAG, SCREEN_TAG, CDP1869_DOT_CLK_PAL)
MCFG_VIDEO_START_OVERRIDE(pecom_state,pecom)
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_CDP1869_ADD(CDP1869_TAG, CDP1869_DOT_CLK_PAL, pecom_cdp1869_intf, cdp1869_page_ram)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
MCFG_SOUND_WAVE_ADD(WAVE_TAG, CASSETTE_TAG)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
MACHINE_CONFIG_END
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