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hook up i8156

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This commit is contained in:
Michaël Banaan Ananas 2012-04-02 23:57:37 +00:00
parent 169a624770
commit 03c583747e
1 changed files with 26 additions and 14 deletions
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40
src/mame/drivers/sbugger.c
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@ -99,12 +99,10 @@ Sound PCB
#include "emu.h"
#include "cpu/i8085/i8085.h"
#include "machine/i8155.h"
#include "sound/sn76496.h"
#include "includes/sbugger.h"
//arbitrary
#define NUM_INTS_FRAME 24
/* memory maps */
@ -112,22 +110,17 @@ static ADDRESS_MAP_START( sbugger_map, AS_PROGRAM, 8, sbugger_state )
AM_RANGE(0x0000, 0x37ff) AM_ROM
AM_RANGE(0xc800, 0xcbff) AM_RAM_WRITE_LEGACY(sbugger_videoram_attr_w) AM_BASE(m_videoram_attr)
AM_RANGE(0xcc00, 0xcfff) AM_RAM_WRITE_LEGACY(sbugger_videoram_w) AM_BASE(m_videoram)
AM_RANGE(0xe000, 0xe0ff) AM_RAM /* sp is set to e0ff */
AM_RANGE(0xe000, 0xe0ff) AM_DEVREADWRITE("i8156", i8155_device, memory_r, memory_w) /* sp is set to e0ff */
AM_RANGE(0xf400, 0xffff) AM_RAM
ADDRESS_MAP_END
static ADDRESS_MAP_START( sbugger_io_map, AS_IO, 8, sbugger_state )
AM_RANGE(0xe0, 0xe0) AM_WRITENOP // 8156 command/status reg (write c0 = command START = (start of timer)
AM_RANGE(0xe1, 0xe1) AM_READ_PORT("INPUTS") // 8156 PA
AM_RANGE(0xe2, 0xe2) AM_READ_PORT("DSW1") // 8156 PB
AM_RANGE(0xe3, 0xe3) AM_READ_PORT("DSW2") // 8156 PC = 6 bit ! //2 bits tested af f4c6
AM_RANGE(0xe4, 0xe4) AM_WRITENOP // 8156 timer reg1 (write 7f = CNT length)
AM_RANGE(0xe5, 0xe5) AM_WRITENOP // 8156 timer reg2 (write c0 = timer mode - automatic reload, i.e. single pulse every time TC is reached)
AM_RANGE(0xe0, 0xe7) AM_DEVREADWRITE("i8156", i8155_device, io_r, io_w)
AM_RANGE(0xe8, 0xe8) AM_DEVWRITE_LEGACY("sn76489.1", sn76496_w)
AM_RANGE(0xe9, 0xe9) AM_DEVWRITE_LEGACY("sn76489.2", sn76496_w)
ADDRESS_MAP_END
/* gfx decode */
static const gfx_layout char16layout =
@ -147,6 +140,7 @@ static GFXDECODE_START( sbugger )
GFXDECODE_ENTRY( "gfx1", 0, char16layout, 0, 1 )
GFXDECODE_END
/* input ports */
static INPUT_PORTS_START( sbugger )
@ -209,18 +203,35 @@ static INPUT_PORTS_START( sbugger )
PORT_BIT( 0xc0, IP_ACTIVE_HIGH, IPT_UNUSED )
INPUT_PORTS_END
/* machine driver */
static WRITE_LINE_DEVICE_HANDLER(sbugger_interrupt)
{
cputag_set_input_line(device->machine(), "maincpu", I8085_RST75_LINE, state ? CLEAR_LINE : ASSERT_LINE );
}
static I8156_INTERFACE(i8156_intf)
{
// all ports set to input
DEVCB_INPUT_PORT("INPUTS"),
DEVCB_NULL,
DEVCB_INPUT_PORT("DSW1"),
DEVCB_NULL,
DEVCB_INPUT_PORT("DSW2"),
DEVCB_NULL,
DEVCB_LINE(sbugger_interrupt)
};
static MACHINE_CONFIG_START( sbugger, sbugger_state )
MCFG_CPU_ADD("maincpu", I8085A, 6000000) /* 3.00 MHz??? */
MCFG_CPU_PROGRAM_MAP(sbugger_map)
MCFG_CPU_IO_MAP(sbugger_io_map)
MCFG_CPU_PERIODIC_INT(irq3_line_hold,NUM_INTS_FRAME*60)
MCFG_I8156_ADD("i8156", 200000, i8156_intf) /* freq is an approximation */
MCFG_GFXDECODE(sbugger)
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
@ -244,6 +255,7 @@ static MACHINE_CONFIG_START( sbugger, sbugger_state )
MACHINE_CONFIG_END
/* rom loading */
ROM_START( sbugger )
@ -275,5 +287,5 @@ ROM_START( sbuggera )
ROM_LOAD( "spbugger.gfx", 0x0000, 0x1000, CRC(d3f345b5) SHA1(a5082ffc3043352e9b731af95770bdd62fb928bf) )
ROM_END
GAME( 1981, sbugger, 0, sbugger, sbugger, 0, ROT270, "Game-A-Tron", "Space Bugger (set 1)", GAME_NOT_WORKING )
GAME( 1981, sbugger, 0, sbugger, sbugger, 0, ROT270, "Game-A-Tron", "Space Bugger (set 1)", GAME_NOT_WORKING | GAME_IMPERFECT_COLORS )
GAME( 1981, sbuggera, sbugger, sbugger, sbugger, 0, ROT270, "Game-A-Tron", "Space Bugger (set 2)", GAME_IMPERFECT_COLORS )