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// license:BSD-3-Clause
// copyright-holders:AJR
/***************************************************************************
Skeleton driver for 6809-based mechanical games by National Sports
Games, Inc. (a division of Skee-Ball Inc.):
* Pitch Hitter - Baseball Challenge
* Super Shot (undumped)
* UB-QB - Football Challenge (undumped)
Memory map for "Universal Game PCB" in Super Shot schematics:
2K SRAM 8K SRAM
JP5-A JP6-B JP7-B JP5-B JP6-A JP7-A
*AUX3 $6000-$7FFF $6000-$7FFF
*AUX2 $2000-$3FFF $2000-$27FF
*AUX1 $4000-$5FFF $4000-$5FFF
*ASIC $1000-$17FF $3000-$37FF
*VIA $0800-$0FFF $2800-$2FFF
*SRAM $0000-$07FF $0000-$1FFF
DEADMAN $1E00-$1FFF $3E00-$3FFF
*IN-D $1E00-$1FFF $3E00-$3FFF
*OUT-C $1C00-$1DFF $3C00-$3DFF
*IN-C $1C00-$1DFF $3C00-$3DFF
*OUT-B $1A00-$1BFF $3A00-$3BFF
*IN-B $1A00-$1BFF $3A00-$3BFF
*OUT-A $1800-$19FF $3800-$39FF
*IN-A $1800-$19FF $3800-$39FF
"ASIC" is a rather odd thing to call a 6551...
***************************************************************************/
#include "emu.h"
#include "cpu/m6809/m6809.h"
#include "machine/6522via.h"
#include "machine/input_merger.h"
#include "machine/mos6551.h"
#include "machine/watchdog.h"
class nsg6809_state : public driver_device
{
public:
nsg6809_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu") {}
required_device<cpu_device> m_maincpu;
void pitchhit(machine_config &config);
void main_map(address_map &map);
};
ADDRESS_MAP_START(nsg6809_state::main_map)
AM_RANGE(0x0000, 0x1fff) AM_RAM
AM_RANGE(0x2800, 0x280f) AM_DEVREADWRITE("via", via6522_device, read, write)
AM_RANGE(0x3000, 0x3003) AM_DEVREADWRITE("acia", mos6551_device, read, write)
AM_RANGE(0x3e00, 0x3e00) AM_DEVWRITE("deadman", watchdog_timer_device, reset_w)
AM_RANGE(0x8000, 0xffff) AM_ROM AM_REGION("maincpu", 0)
ADDRESS_MAP_END
static INPUT_PORTS_START( pitchhit )
INPUT_PORTS_END
MACHINE_CONFIG_START(nsg6809_state::pitchhit)
MCFG_CPU_ADD("maincpu", MC6809, XTAL(4'000'000)) // clock buffered through 74HC4060
MCFG_CPU_PROGRAM_MAP(main_map)
MCFG_DEVICE_ADD("via", VIA6522, XTAL(4'000'000) / 4)
MCFG_VIA6522_IRQ_HANDLER(DEVWRITELINE("mainirq", input_merger_device, in_w<0>))
MCFG_DEVICE_ADD("acia", MOS6551, 0)
MCFG_MOS6551_XTAL(XTAL(1'843'200))
MCFG_MOS6551_IRQ_HANDLER(DEVWRITELINE("mainirq", input_merger_device, in_w<1>))
MCFG_WATCHDOG_ADD("deadman")
MCFG_INPUT_MERGER_ANY_HIGH("mainirq")
MCFG_INPUT_MERGER_OUTPUT_HANDLER(INPUTLINE("maincpu", M6809_IRQ_LINE))
MACHINE_CONFIG_END
/*
Pitch Hitter Eprom 27c256 by National Sports Games (aka Skeeball)
location U-14
IC label "PH101C" and "CK# $A790"
*/
ROM_START( pitchhit )
ROM_REGION( 0x8000, "maincpu", 0 )
ROM_LOAD( "PH101C__CK_A790.U14", 0x0000, 0x8000, CRC(1d306ab7) SHA1(13faf7c6dca8e5482672b2d09a99616896c4ae55) )
ROM_END
GAME(1993, pitchhit, 0, pitchhit, pitchhit, nsg6809_state, 0, ROT0, "National Sports Games", "Pitch Hitter - Baseball Challenge", MACHINE_IS_SKELETON_MECHANICAL )
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