summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/isa/vga.cpp
blob: 0419ecdd2557e65e1ac2fec268bfd86242cfdae6 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
// license:BSD-3-Clause
// copyright-holders:Barry Rodewald
/***************************************************************************

  ISA VGA wrapper

***************************************************************************/

#include "emu.h"
#include "vga.h"
#include "video/pc_vga.h"
#include "screen.h"

ROM_START( ibm_vga )
	ROM_REGION(0x8000,"ibm_vga", 0)
	ROM_LOAD("ibm-vga.bin", 0x00000, 0x8000, BAD_DUMP CRC(74e3fadb) SHA1(dce6491424f1726203776dfae9a967a98a4ba7b5) )
ROM_END

//**************************************************************************
//  GLOBAL VARIABLES
//**************************************************************************

DEFINE_DEVICE_TYPE(ISA8_VGA, isa8_vga_device, "ibm_vga", "IBM VGA Graphics Card")


//-------------------------------------------------
//  device_add_mconfig - add device configuration
//-------------------------------------------------

void isa8_vga_device::device_add_mconfig(machine_config &config)
{
	screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
	screen.set_raw(XTAL(25'174'800), 900, 0, 640, 526, 0, 480);
	screen.set_screen_update("vga", FUNC(vga_device::screen_update));

	VGA(config, "vga", 0).set_screen("screen");
}

//-------------------------------------------------
//  rom_region - device-specific ROM region
//-------------------------------------------------

const tiny_rom_entry *isa8_vga_device::device_rom_region() const
{
	return ROM_NAME( ibm_vga );
}

//**************************************************************************
//  LIVE DEVICE
//**************************************************************************

//-------------------------------------------------
//  isa8_vga_device - constructor
//-------------------------------------------------

isa8_vga_device::isa8_vga_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
	device_t(mconfig, ISA8_VGA, tag, owner, clock),
	device_isa8_card_interface(mconfig, *this), m_vga(nullptr)
{
}

//-------------------------------------------------
//  device_start - device-specific startup
//-------------------------------------------------
READ8_MEMBER( isa8_vga_device::input_port_0_r ) { return 0xff; } //return machine().root_device().ioport("IN0")->read(); }

void isa8_vga_device::device_start()
{
	set_isa_device();

	m_vga = subdevice<vga_device>("vga");

	m_isa->install_rom(this, 0xc0000, 0xc7fff, "ibm_vga", "ibm_vga");

	m_isa->install_device(0x3b0, 0x3bf, read8_delegate(FUNC(vga_device::port_03b0_r),m_vga), write8_delegate(FUNC(vga_device::port_03b0_w),m_vga));
	m_isa->install_device(0x3c0, 0x3cf, read8_delegate(FUNC(vga_device::port_03c0_r),m_vga), write8_delegate(FUNC(vga_device::port_03c0_w),m_vga));
	m_isa->install_device(0x3d0, 0x3df, read8_delegate(FUNC(vga_device::port_03d0_r),m_vga), write8_delegate(FUNC(vga_device::port_03d0_w),m_vga));

	m_isa->install_memory(0xa0000, 0xbffff, read8_delegate(FUNC(vga_device::mem_r),m_vga), write8_delegate(FUNC(vga_device::mem_w),m_vga));
}

//-------------------------------------------------
//  device_reset - device-specific reset
//-------------------------------------------------

void isa8_vga_device::device_reset()
{
}