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amusco: Fix PIT IRQs; game speed is much better now

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pit8253: MSB-only counter writes need to lower outputs in mode 0
This commit is contained in:
AJR 2016-11-13 01:03:29 -05:00
parent 5ef3fe31e7
commit e86f303d26
2 changed files with 14 additions and 15 deletions
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6
src/devices/machine/pit8253.cpp
View File

@ -288,6 +288,7 @@ void pit8253_device::set_output(pit8253_timer *timer, int output)
if (output != timer->output)
{
timer->output = output;
LOG2(("set_output(): timer %d, %s\n", timer->index, output ? "low to high" : "high to low"));
switch (timer->index)
{
@ -1007,6 +1008,11 @@ WRITE8_MEMBER( pit8253_device::write )
load_count(timer, data << 8);
simulate2(timer, 0);
if (CTRL_MODE(timer->control) == 0)
{
set_output(timer, 0);
}
break;
case 3:

23
src/mame/drivers/amusco.cpp
View File

@ -77,6 +77,8 @@
#define CPU_CLOCK MASTER_CLOCK / 4 /* guess */
#define CRTC_CLOCK SECOND_CLOCK / 8 /* guess */
#define SND_CLOCK SECOND_CLOCK / 8 /* guess */
#define PIT_CLOCK0 SECOND_CLOCK / 8 /* guess */
#define PIT_CLOCK1 SECOND_CLOCK / 8 /* guess */
#include "emu.h"
#include "cpu/i86/i86.h"
@ -111,7 +113,6 @@ public:
virtual void machine_start() override;
DECLARE_READ8_MEMBER(hack_coin1_r);
DECLARE_READ8_MEMBER(hack_coin2_r);
DECLARE_READ8_MEMBER(hack_908_r);
DECLARE_READ8_MEMBER(mc6845_r);
DECLARE_WRITE8_MEMBER(mc6845_w);
DECLARE_WRITE8_MEMBER(output_a_w);
@ -191,12 +192,6 @@ READ8_MEMBER(amusco_state::hack_coin2_r)
return BIT(ioport("IN2")->read(), 2) ? 1 : 0;
}
READ8_MEMBER(amusco_state::hack_908_r)
{
// IRQ4 and other routines wait for bits of this to be set by IRQ2
return 0xff;
}
/*************************
* Memory Map Information *
*************************/
@ -204,7 +199,6 @@ READ8_MEMBER(amusco_state::hack_908_r)
static ADDRESS_MAP_START( amusco_mem_map, AS_PROGRAM, 8, amusco_state )
AM_RANGE(0x006a6, 0x006a6) AM_READ(hack_coin1_r)
AM_RANGE(0x006a8, 0x006a8) AM_READ(hack_coin2_r)
AM_RANGE(0x00908, 0x00908) AM_READ(hack_908_r)
AM_RANGE(0x00000, 0x0ffff) AM_RAM
AM_RANGE(0xec000, 0xecfff) AM_RAM AM_SHARE("videoram") // placeholder
AM_RANGE(0xf8000, 0xfffff) AM_ROM
@ -372,7 +366,7 @@ static INPUT_PORTS_START( amusco )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_POKER_HOLD4 ) // move down in service mode
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_POKER_HOLD3 ) // move up in service mode
PORT_START("IN2")
PORT_START("IN2") // TO DO: enabling IRQ4 produces COIN ERROR message
PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_COIN1 ) //PORT_WRITE_LINE_DEVICE_MEMBER("pic8259", pic8259_device, ir4_w)
PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_COIN2 ) //PORT_WRITE_LINE_DEVICE_MEMBER("pic8259", pic8259_device, ir4_w)
PORT_BIT( 0xf9, IP_ACTIVE_HIGH, IPT_UNUSED )
@ -435,10 +429,10 @@ static MACHINE_CONFIG_START( amusco, amusco_state )
MCFG_PIC8259_ADD("pic8259", INPUTLINE("maincpu", 0), VCC, NOOP)
MCFG_DEVICE_ADD("pit8253", PIT8253, 0)
//MCFG_PIT8253_CLK0(nnn)
//MCFG_PIT8253_OUT0_HANDLER(DEVWRITELINE("pic8259", pic8259_device, ir0_w))
//MCFG_PIT8253_CLK1(nnn)
//MCFG_PIT8253_OUT1_HANDLER(DEVWRITELINE("pic8259", pic8259_device, ir2_w))
MCFG_PIT8253_CLK0(PIT_CLOCK0)
MCFG_PIT8253_OUT0_HANDLER(DEVWRITELINE("pic8259", pic8259_device, ir0_w))
MCFG_PIT8253_CLK1(PIT_CLOCK1)
MCFG_PIT8253_OUT1_HANDLER(DEVWRITELINE("pic8259", pic8259_device, ir2_w))
MCFG_DEVICE_ADD("ppi_outputs", I8255, 0)
MCFG_I8255_OUT_PORTA_CB(WRITE8(amusco_state, output_a_w))
@ -479,7 +473,6 @@ static MACHINE_CONFIG_START( amusco, amusco_state )
MCFG_MC6845_CHAR_WIDTH(8)
MCFG_MC6845_ADDR_CHANGED_CB(amusco_state, crtc_addr)
MCFG_MC6845_OUT_DE_CB(DEVWRITELINE("pic8259", pic8259_device, ir1_w)) // IRQ1 sets 0x918 bit 3
MCFG_MC6845_OUT_VSYNC_CB(DEVWRITELINE("pic8259", pic8259_device, ir0_w)) // IRQ0 sets 0x665 to 0xff
MCFG_MC6845_UPDATE_ROW_CB(amusco_state, update_row)
/* sound hardware */
@ -537,5 +530,5 @@ ROM_END
*************************/
/* YEAR NAME PARENT MACHINE INPUT STATE INIT ROT COMPANY FULLNAME FLAGS LAYOUT */
GAMEL( 1987, amusco, 0, amusco, amusco, driver_device, 0, ROT0, "Amusco", "American Music Poker (V1.4)", MACHINE_IMPERFECT_COLORS | MACHINE_NODEVICE_PRINTER, layout_amusco ) // runs much too fast; palette totally wrong
GAMEL( 1987, amusco, 0, amusco, amusco, driver_device, 0, ROT0, "Amusco", "American Music Poker (V1.4)", MACHINE_IMPERFECT_COLORS | MACHINE_NODEVICE_PRINTER, layout_amusco ) // palette totally wrong
GAME( 1988, draw88pkr, 0, amusco, amusco, driver_device, 0, ROT0, "BTE, Inc.", "Draw 88 Poker (V2.0)", MACHINE_NOT_WORKING | MACHINE_IMPERFECT_COLORS | MACHINE_NODEVICE_PRINTER )