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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Amstrad PC1640 Integrated Graphics Adapter emulation
**********************************************************************
This display controller is integrated on the PC1640 motherboard
but wired to the ISA bus, and can be disabled with a DIP switch.
WD Paradise PEGA 1A 38304B 2116-002 8745AAA JAPAN (84 pin PLCC)
Single chip multimode EGA video controller with
integral 6845 CRTC. Provides 100% IBM EGA, CGA,
MDA, Hercules graphics and Plantronics COLORPLUS*
compatibility
**********************************************************************/
#include "emu.h"
#include "pc1640_iga.h"
//**************************************************************************
// MACROS / CONSTANTS
//**************************************************************************
#define PEGA1A_TAG "ic910"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(ISA8_PC1640_IGA, isa8_pc1640_iga_device, "pc1640_iga", "Amstrad PC1640 IGA")
//-------------------------------------------------
// ROM( pc1640_iga )
//-------------------------------------------------
ROM_START( pc1640_iga )
ROM_REGION16_LE( 0x8000, "iga", 0)
ROM_LOAD( "40100.ic913", 0x0000, 0x8000, CRC(d2d1f1ae) SHA1(98302006ee38a17c09bd75504cc18c0649174e33) ) // 8736 E
ROM_END
//-------------------------------------------------
// rom_region - device-specific ROM region
//-------------------------------------------------
const tiny_rom_entry *isa8_pc1640_iga_device::device_rom_region() const
{
return ROM_NAME( pc1640_iga );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// isa8_pc1640_iga_device - constructor
//-------------------------------------------------
isa8_pc1640_iga_device::isa8_pc1640_iga_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: isa8_ega_device(mconfig, ISA8_PC1640_IGA, tag, owner, clock)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void isa8_pc1640_iga_device::device_start()
{
if (m_palette != nullptr && !m_palette->started())
throw device_missing_dependencies();
set_isa_device();
for (int i = 0; i < 64; i++ )
{
uint8_t r = ( ( i & 0x04 ) ? 0xAA : 0x00 ) + ( ( i & 0x20 ) ? 0x55 : 0x00 );
uint8_t g = ( ( i & 0x02 ) ? 0xAA : 0x00 ) + ( ( i & 0x10 ) ? 0x55 : 0x00 );
uint8_t b = ( ( i & 0x01 ) ? 0xAA : 0x00 ) + ( ( i & 0x08 ) ? 0x55 : 0x00 );
m_palette->set_pen_color( i, r, g, b );
}
/* Install 256KB Video ram on our EGA card */
m_vram = make_unique_clear<uint8_t[]>(256 * 1024);
m_videoram = m_vram.get();
m_plane[0] = m_videoram + 0x00000;
m_plane[1] = m_videoram + 0x10000;
m_plane[2] = m_videoram + 0x20000;
m_plane[3] = m_videoram + 0x30000;
m_isa->install_rom(this, 0xc0000, 0xc7fff, "ega", "iga");
m_isa->install_device(0x3b0, 0x3bf, read8sm_delegate(*this, FUNC(isa8_ega_device::pc_ega8_3b0_r)), write8sm_delegate(*this, FUNC(isa8_ega_device::pc_ega8_3b0_w)));
m_isa->install_device(0x3c0, 0x3cf, read8sm_delegate(*this, FUNC(isa8_ega_device::pc_ega8_3c0_r)), write8sm_delegate(*this, FUNC(isa8_ega_device::pc_ega8_3c0_w)));
m_isa->install_device(0x3d0, 0x3df, read8sm_delegate(*this, FUNC(isa8_ega_device::pc_ega8_3d0_r)), write8sm_delegate(*this, FUNC(isa8_ega_device::pc_ega8_3d0_w)));
}
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