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Add (mostly) skeleton driver for the DECwriter III (LA120) [Lord Nightmare, NeXT]

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Lord-Nightmare 2015-09-20 01:09:16 -04:00
parent b78db615ed
commit ed89f8d6e3
3 changed files with 106 additions and 0 deletions
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1
scripts/target/mame/mess.lua
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@ -1386,6 +1386,7 @@ createMESSProjects(_target, _subtarget, "dec")
files {
MAME_DIR .. "src/mess/drivers/dct11em.c",
MAME_DIR .. "src/mess/drivers/dectalk.c",
MAME_DIR .. "src/mess/drivers/decwritr.c",
MAME_DIR .. "src/mess/drivers/pdp11.c",
MAME_DIR .. "src/mess/drivers/vax11.c",
MAME_DIR .. "src/mess/drivers/rainbow.c",

1
src/mame/mess.lst
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@ -1606,6 +1606,7 @@ mekd2 // 1977 Motorola Evaluation Kit
// DEC
pdp1 // 1961 DEC PDP1
la120 // 1978 Digital Equipment Corporation
vt100 // 1978 Digital Equipment Corporation
//vt100wp // 1978 Digital Equipment Corporation
//vt100stp // 1978 Digital Equipment Corporation

104
src/mess/drivers/decwritr.c Normal file
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@ -0,0 +1,104 @@
// license:BSD-3-Clause
// copyright-holders:Jonathan Gevaryahu
/*************************************************************************
decwritr.c
Digital Equipment Corporation
DECwriter III (LA120) Teletype/Teleprinter, 1978
**************************************************************************/
#include "emu.h"
#include "render.h"
#include "ui/selgame.h"
#include "cpu/i8085/i8085.h"
//**************************************************************************
// DRIVER STATE
//**************************************************************************
class decwriter_state : public driver_device
{
public:
// constructor
decwriter_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu")
{
}
/*
virtual void machine_start()
{
// force the UI to show the game select screen
ui_menu_select_game::force_game_select(machine(), &machine().render().ui_container());
}
*/
UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
bitmap.fill(rgb_t::black);
return 0;
}
private:
required_device<cpu_device> m_maincpu;
//required_device<generic_terminal_device> m_terminal;
};
static ADDRESS_MAP_START(la120_mem, AS_PROGRAM, 8, decwriter_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE( 0x0000, 0x2fff ) AM_ROM
//AM_RANGE( 0x3000, 0x3fff ) // keyboard
AM_RANGE( 0x4000, 0x43ff ) AM_MIRROR(0x0c00) AM_RAM // 1k 'low ram'
AM_RANGE( 0x5000, 0x53ff ) AM_MIRROR(0x0c00) AM_RAM // 1k 'high ram'
AM_RANGE( 0x6000, 0x6fff ) AM_RAM // ER1400 EAROM
AM_RANGE( 0x7000, 0x7fff ) // DC305 printer controller ASIC stuff
// 8000-ffff is reserved for expansion (i.e. unused, open bus)
ADDRESS_MAP_END
static ADDRESS_MAP_START(la120_io, AS_IO, 8, decwriter_state)
ADDRESS_MAP_UNMAP_HIGH
//AM_RANGE(0x00, 0x00) AM_MIRROR(0x7D) // 8251 usart
//AM_RANGE(0x02, 0x02) AM_MIRROR(0x7D) // other io ports
// 0x80-0xff are reserved for expansion (i.e. unused, open bus)
ADDRESS_MAP_GLOBAL_MASK(0xff)
ADDRESS_MAP_END
//**************************************************************************
// MACHINE DRIVERS
//**************************************************************************
static MACHINE_CONFIG_START( la120, decwriter_state )
MCFG_CPU_ADD("maincpu",I8080, XTAL_24_8832MHz / 9)
MCFG_CPU_PROGRAM_MAP(la120_mem)
MCFG_CPU_IO_MAP(la120_io)
// video hardware
//TODO: no actual screen! just paper.
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_UPDATE_DRIVER(decwriter_state, screen_update)
MCFG_SCREEN_SIZE(640,480)
MCFG_SCREEN_VISIBLE_AREA(0,639, 0,479)
MCFG_SCREEN_REFRESH_RATE(30)
MACHINE_CONFIG_END
//**************************************************************************
// ROM DEFINITIONS
//**************************************************************************
ROM_START( la120 )
ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
// later romset, with 23-003e2, 23-004e2, 23-005e2, 23-006e2 replaced by one rom, 23-038e4
ROM_LOAD( "23-038e4-00.e6", 0x0000, 0x2000, CRC(12b80c00) SHA1(35875a85c5037454ac4a82ee19ea9f0337ad0dbe))
ROM_LOAD( "23-007e2-00.e4", 0x2000, 0x0800, CRC(41eaebf1) SHA1(c7d05417b24b853280d1636776d399a0aea34720)) // used by both earlier and later romset
// there is an optional european and APL rom which goes from 2800-2fff, undumped.
ROM_END
//**************************************************************************
// GAME DRIVERS
//**************************************************************************
/* YEAR NAME PARENT COMPAT MACHINE STATE INPUT INIT COMPANY FULLNAME FLAGS */
GAME( 1978, la120, 0, la120, 0, driver_device, 0, 0, "Digital Equipment Corporation", "DECwriter III (LA120)", MACHINE_NO_SOUND | MACHINE_IS_SKELETON | MACHINE_NOT_WORKING )