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avt : added notes from the remnants of the schematic (nw)

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Robbbert 2017-10-19 12:00:34 +11:00
parent aef651f228
commit 5421be9747
1 changed files with 26 additions and 19 deletions
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45
src/mame/drivers/avt.cpp
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@ -420,7 +420,7 @@
#include "machine/nvram.h"
#include "sound/ay8910.h"
#include "video/mc6845.h"
//#include "machine/z80ctc.h"
#include "machine/z80ctc.h"
#include "machine/z80pio.h"
#include "screen.h"
#include "speaker.h"
@ -438,7 +438,7 @@ public:
: driver_device(mconfig, type, tag)
, m_maincpu(*this,"maincpu")
, m_crtc(*this, "crtc")
, m_pio1(*this, "pio1")
, m_pio0(*this, "pio0")
, m_videoram(*this, "videoram")
, m_colorram(*this, "colorram")
, m_gfxdecode(*this, "gfxdecode")
@ -461,7 +461,7 @@ private:
virtual void video_start() override;
required_device<cpu_device> m_maincpu;
required_device<mc6845_device> m_crtc;
required_device<z80pio_device> m_pio1;
required_device<z80pio_device> m_pio0;
required_shared_ptr<uint8_t> m_videoram;
required_shared_ptr<uint8_t> m_colorram;
required_device<gfxdecode_device> m_gfxdecode;
@ -647,13 +647,8 @@ ADDRESS_MAP_END
static ADDRESS_MAP_START( avt_portmap, AS_IO, 8, avt_state )
ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE(0x00, 0x03) AM_DEVREADWRITE("pio1", z80pio_device, read_alt, write_alt)
// AM_RANGE(0x00, 0x00) AM_READ_PORT("DSW1")
// AM_RANGE(0x01, 0x01) AM_READ_PORT("IN1")
// AM_RANGE(0x02, 0x02) AM_READ_PORT("IN0")
AM_RANGE(0x08, 0x0b) AM_DEVREADWRITE("pio2", z80pio_device, read_alt, write_alt)
// AM_RANGE(0x08, 0x08) AM_READ_PORT("IN2")
// AM_RANGE(0x09, 0x09) AM_READ_PORT("IN3")
AM_RANGE(0x00, 0x03) AM_DEVREADWRITE("pio0", z80pio_device, read_alt, write_alt)
AM_RANGE(0x08, 0x0b) AM_DEVREADWRITE("pio1", z80pio_device, read_alt, write_alt)
AM_RANGE(0x21, 0x21) AM_DEVWRITE("aysnd", ay8910_device, data_w) /* AY8910 data */
AM_RANGE(0x23, 0x23) AM_DEVWRITE("aysnd", ay8910_device, address_w) /* AY8910 control */
AM_RANGE(0x28, 0x28) AM_WRITE(avt_6845_address_w)
@ -663,7 +658,7 @@ ADDRESS_MAP_END
/* I/O byte R/W
(from avtbingo)
inputs are throusg port 02h, masked with 0x3F & 0x40.
inputs are through port 02h, masked with 0x3F & 0x40.
02C3: DB 02 in a,($02)
02C5: 2F cpl
@ -687,6 +682,7 @@ ADDRESS_MAP_END
1ACE: CD B6 2D call $2DB6 ----> nothing there!!!
This changes which lamps are lit depending on which ones are lit now..
poll the port 00h and compare with 0x03
1379: 0E 00 ld c,$00
@ -901,7 +897,7 @@ static INPUT_PORTS_START( avtbingo )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_COIN1 ) PORT_IMPULSE(2)
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_POKER_HOLD5 ) PORT_NAME("Column 5 UP")
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_POKER_HOLD4 ) PORT_NAME("Column 4 UP")
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_7) PORT_NAME("IN0-7") // Used. Masked 0x40. See code at PC=0338.
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_OTHER ) PORT_CODE(KEYCODE_7) PORT_NAME("IN0-7") // Used. Masked 0x40. See code at PC=0338. (SW2 to enter setup)
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )
INPUT_PORTS_END
@ -938,19 +934,18 @@ GFXDECODE_END
// our pio cannot detect a static interrupt, so we push the current switch state in, then it will work
INTERRUPT_GEN_MEMBER(avt_state::avt_vblank_irq)
{
m_pio1->port_b_write(ioport("IN0")->read());
m_pio0->port_b_write(ioport("IN0")->read());
}
static const z80_daisy_config daisy_chain[] =
{
//{ "ctc0" },
{ "pio1" },
{ "pio2" },
//{ "ctc" },
{ "pio0" },
{ nullptr }
};
static MACHINE_CONFIG_START( avt )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", Z80, CPU_CLOCK) /* guess */
MCFG_Z80_DAISY_CHAIN(daisy_chain)
@ -966,7 +961,6 @@ static MACHINE_CONFIG_START( avt )
MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 0*8, 32*8-1) /* 240x224 (through CRTC) */
MCFG_SCREEN_UPDATE_DRIVER(avt_state, screen_update_avt)
MCFG_SCREEN_PALETTE("palette")
MCFG_GFXDECODE_ADD("gfxdecode", "palette", avt)
MCFG_PALETTE_ADD("palette", 8*16)
@ -975,18 +969,31 @@ static MACHINE_CONFIG_START( avt )
MCFG_MC6845_ADD("crtc", MC6845, "screen", CRTC_CLOCK) /* guess */
MCFG_MC6845_SHOW_BORDER_AREA(false)
MCFG_MC6845_CHAR_WIDTH(8)
MCFG_MC6845_OUT_VSYNC_CB(DEVWRITELINE("ctc0", z80ctc_device, trg3))
/* sound hardware */
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_ADD("aysnd", AY8910, CPU_CLOCK/2) /* 1.25 MHz.?? */
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
MCFG_DEVICE_ADD("pio1", Z80PIO, CPU_CLOCK)
// device never addressed by cpu
MCFG_DEVICE_ADD("ctc0", Z80CTC, CPU_CLOCK) // U27
MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
MCFG_Z80CTC_ZC0_CB(DEVWRITELINE("ctc0", z80ctc_device, trg1))
// ZC1 not connected
// TRG2 to TP18; ZC2 to TP9; TRG3 to VSYNC; TRG0 to cpu_clock/4
MCFG_DEVICE_ADD("pio0", Z80PIO, CPU_CLOCK) // U23
MCFG_Z80PIO_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
MCFG_Z80PIO_IN_PB_CB(IOPORT("IN0"))
// PORT A appears to be lamp drivers
// PORT B d0-d5 = muxed inputs; d6 = SW2 pushbutton; d7 = ?
MCFG_DEVICE_ADD("pio2", Z80PIO, CPU_CLOCK)
MCFG_DEVICE_ADD("pio1", Z80PIO, CPU_CLOCK) // U22
MCFG_Z80PIO_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
// PORT A d0-d7 = TP13,TP12,TP11,TP10,TP8,TP7,TP5,TP3
// PORT B d0-d7 = "Player2", DCOM, CCOM, BCOM, ACOM, LOCKOUT/TP6, TP4, 50/60HZ (held high, jumper on JP13 grounds it)
// DCOM,CCOM,BCOM,ACOM appear to be muxes
MACHINE_CONFIG_END