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upscope: Hook up PPI

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This commit is contained in:
Dirk Best 2017-04-30 04:09:27 +02:00
parent 42521609d9
commit 48a49a40bd
1 changed files with 33 additions and 30 deletions
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63
src/mame/drivers/upscope.cpp
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@ -28,6 +28,7 @@
#include "emu.h"
#include "includes/amiga.h"
#include "cpu/m68000/m68000.h"
#include "machine/i8255.h"
#include "machine/nvram.h"
#include "machine/amigafdc.h"
#include "speaker.h"
@ -39,7 +40,8 @@ public:
upscope_state(const machine_config &mconfig, device_type type, const char *tag)
: amiga_state(mconfig, type, tag),
m_prev_cia1_porta(0xff),
m_parallel_data(0xff)
m_parallel_data(0xff),
m_ppi(*this, "ppi")
{ }
uint8_t m_nvram[0x100];
@ -53,10 +55,16 @@ public:
DECLARE_READ8_MEMBER(upscope_cia_1_porta_r);
DECLARE_WRITE8_MEMBER(upscope_cia_1_porta_w);
DECLARE_WRITE8_MEMBER(lamps_w);
DECLARE_WRITE8_MEMBER(coin_counter_w);
DECLARE_DRIVER_INIT(upscope);
protected:
virtual void machine_reset() override;
private:
required_device<i8255_device> m_ppi;
};
@ -132,34 +140,7 @@ WRITE8_MEMBER( upscope_state::upscope_cia_1_porta_w )
/* if SEL == 1 && BUSY == 1, we write data to internal registers */
else if ((data & 5) == 5)
{
switch (m_nvram_address_latch)
{
case 0x01:
/* lamps:
01 = Enemy Right
02 = Enemy Left
04 = Torpedo 1
08 = Torpedo 2
10 = Torpedo 3
20 = Torpedo 4
40 = Sight
80 = Bubble Light
*/
break;
case 0x02:
/* coin counter */
machine().bookkeeping().coin_counter_w(0, data & 1);
break;
case 0x03:
/* Written $98 at startup and nothing afterwards */
break;
default:
logerror("Internal register (%d) = %02X\n", m_nvram_address_latch, m_parallel_data);
break;
}
m_ppi->write(space, m_nvram_address_latch & 0x03, m_parallel_data);
}
/* if SEL == 0 && BUSY == 1, we write data to NVRAM */
@ -183,7 +164,7 @@ WRITE8_MEMBER( upscope_state::upscope_cia_1_porta_w )
if (data & 4)
{
if (LOG_IO) logerror("Internal register (%d) read\n", m_nvram_address_latch);
m_nvram_data_latch = (m_nvram_address_latch == 0) ? ioport("IO0")->read() : 0xff;
m_nvram_data_latch = m_ppi->read(space, m_nvram_address_latch & 0x03);
}
/* if SEL == 0, we read NVRAM */
@ -198,6 +179,22 @@ WRITE8_MEMBER( upscope_state::upscope_cia_1_porta_w )
m_prev_cia1_porta = data;
}
WRITE8_MEMBER( upscope_state::lamps_w )
{
// 7------- bubble light
// -6------ sight
// --5----- torpedo 4
// ---4---- torpedo 3
// ----3--- torpedo 2
// -----2-- torpedo 1
// ------1- enemy left
// -------0 enemy right
}
WRITE8_MEMBER( upscope_state::coin_counter_w )
{
machine().bookkeeping().coin_counter_w(0, data & 1);
}
/*************************************
@ -307,6 +304,12 @@ static MACHINE_CONFIG_START( upscope, upscope_state )
/* fdc */
MCFG_DEVICE_ADD("fdc", AMIGA_FDC, amiga_state::CLK_7M_NTSC)
MCFG_AMIGA_FDC_INDEX_CALLBACK(DEVWRITELINE("cia_1", mos8520_device, flag_w))
// i/o extension
MCFG_DEVICE_ADD("ppi", I8255, 0)
MCFG_I8255_IN_PORTA_CB(IOPORT("IO0"))
MCFG_I8255_OUT_PORTB_CB(WRITE8(upscope_state, lamps_w))
MCFG_I8255_OUT_PORTC_CB(WRITE8(upscope_state, coin_counter_w))
MACHINE_CONFIG_END