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video21: Add NVRAM; remove MCFG_ macros; more clock guesses (nw)

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This commit is contained in:
AJR 2018-09-16 09:51:58 -04:00
parent 8be6a48629
commit 5b4654319e
1 changed files with 17 additions and 15 deletions
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32
src/mame/drivers/video21.cpp
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@ -26,6 +26,7 @@ When booted, press W to get it going.
#include "emu.h"
#include "cpu/i8085/i8085.h"
#include "machine/nvram.h"
#include "screen.h"
#include "emupal.h"
@ -88,7 +89,7 @@ uint32_t video21_state::screen_update(screen_device &screen, bitmap_ind16 &bitma
void video21_state::mem_map(address_map &map) {
map(0x0000,0x0fff).rom().mirror(0x3000);
map(0xe000,0xe3ff).ram().share("videoram");
map(0xff00,0xffff).ram();
map(0xff00,0xffff).ram().share("nvram");
}
void video21_state::io_map(address_map &map) {
@ -179,26 +180,27 @@ static GFXDECODE_START( gfx_video21 )
GFXDECODE_ENTRY( "chargen", 0x0000, video21_charlayout, 0, 1 )
GFXDECODE_END
MACHINE_CONFIG_START( video21_state::video21 )
void video21_state::video21(machine_config &config)
{
/* basic machine hardware */
MCFG_DEVICE_ADD("maincpu", I8080A, 20.79_MHz_XTAL / 16) // crystal confirmed but divisor unknown
MCFG_DEVICE_PROGRAM_MAP(mem_map)
MCFG_DEVICE_IO_MAP(io_map)
I8080A(config, m_maincpu, 20.79_MHz_XTAL / 10); // crystal confirmed but divisor unknown (divider appears to be 74LS160)
m_maincpu->set_addrmap(AS_PROGRAM, &video21_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &video21_state::io_map);
NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0);
/* video hardware */
MCFG_SCREEN_ADD_MONOCHROME("screen", RASTER, rgb_t::white())
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(250))
MCFG_SCREEN_UPDATE_DRIVER(video21_state, screen_update)
MCFG_SCREEN_SIZE(32*8, 28*8)
MCFG_SCREEN_VISIBLE_AREA(0, 32*8-1, 0, 28*8-1)
MCFG_SCREEN_PALETTE("palette")
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_color(rgb_t::white());
screen.set_raw(20.79_MHz_XTAL / 4, 330, 0, 32*8, 315, 0, 28*8); // parameters guessed
screen.set_screen_update(FUNC(video21_state::screen_update));
screen.set_palette("palette");
MCFG_DEVICE_ADD("gfxdecode", GFXDECODE, "palette", gfx_video21)
MCFG_PALETTE_ADD_MONOCHROME("palette")
GFXDECODE(config, "gfxdecode", "palette", gfx_video21);
PALETTE(config, "palette", 2).set_init("palette", FUNC(palette_device::palette_init_monochrome));
/* sound hardware */
MACHINE_CONFIG_END
}