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wheelfir: Use ADC0808 device

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Remove 'pcb linking suspicious code' comment - it's just the ADC
reading.
This commit is contained in:
Dirk Best 2018-04-02 12:01:53 +02:00
parent 69bdb2d308
commit 1ab055980a
1 changed files with 31 additions and 49 deletions
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80
src/mame/drivers/wheelfir.cpp
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@ -164,50 +164,11 @@ BIT M - ( DATA1 != 0) ? 1 : 0 (or DATA1 MSB)
BIT N - ( scale < 50% ) ? 1 : 0
pcb linking
-----------
suspicious code:
(write/read (exchange data))
0A535C: 48E7 6080 movem.l D1-D2/A0, -(A7)
0A5360: 41F9 0078 0000 lea $780000.l, A0
0A5366: D040 add.w D0, D0
0A5368: 3181 0000 move.w D1, (A0,D0.w) ; write data
0A536C: 3239 007E 0000 move.w $7e0000.l, D1
0A5372: 0801 000D btst #$d, D1
0A5376: 67F4 beq $a536c
0A5378: 3230 0000 move.w (A0,D0.w), D1 ; read data
0A537C: 0241 00FF andi.w #$ff, D1
(unk., maybe sync or config ?)
0A53C2: 2F08 move.l A0, -(A7)
0A53C4: 3F01 move.w D1, -(A7)
0A53C6: 41F9 0078 0000 lea $780000.l, A0
0A53CC: D040 add.w D0, D0
0A53CE: 3180 0000 move.w D0, (A0,D0.w) ; write offset
0A53D2: 3180 0000 move.w D0, (A0,D0.w) ; again
0A53D6: 3239 007E 0000 move.w $7e0000.l, D1
0A53DC: 0801 000D btst #$d, D1 ; flag test
0A53E0: 67F4 beq $a53d6
0A53E2: 3030 0000 move.w (A0,D0.w), D0
0A53E6: 0240 00FF andi.w #$ff, D0
0A53EA: 321F move.w (A7)+, D1
0A53EC: 205F movea.l (A7)+, A0
0A53EE: 4E75 rts
*/
#include "emu.h"
#include "cpu/m68000/m68000.h"
#include "machine/adc0808.h"
#include "machine/eepromser.h"
#include "machine/gen_latch.h"
#include "machine/timer.h"
@ -240,8 +201,18 @@ public:
m_subcpu(*this, "subcpu"),
m_eeprom(*this, "eeprom"),
m_screen(*this, "screen"),
m_palette(*this, "palette") { }
m_palette(*this, "palette"),
m_adc_eoc(0)
{ }
void wheelfir(machine_config &config);
DECLARE_READ_LINE_MEMBER(adc_eoc_r);
protected:
virtual void machine_start() override;
virtual void video_start() override;
private:
required_device<cpu_device> m_maincpu;
required_device<cpu_device> m_subcpu;
required_device<eeprom_serial_93cxx_device> m_eeprom;
@ -283,15 +254,14 @@ public:
DECLARE_WRITE16_MEMBER(wheelfir_snd_w);
DECLARE_READ16_MEMBER(wheelfir_snd_r);
DECLARE_WRITE16_MEMBER(coin_cnt_w);
virtual void machine_start() override;
virtual void video_start() override;
DECLARE_WRITE_LINE_MEMBER(adc_eoc_w);
uint32_t screen_update_wheelfir(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
DECLARE_WRITE_LINE_MEMBER(screen_vblank_wheelfir);
TIMER_DEVICE_CALLBACK_MEMBER(scanline_timer_callback);
void wheelfir(machine_config &config);
void ramdac_map(address_map &map);
void wheelfir_main(address_map &map);
void wheelfir_sub(address_map &map);
int m_adc_eoc;
};
@ -620,10 +590,7 @@ void wheelfir_state::wheelfir_main(address_map &map)
map(0x720005, 0x720005).w("ramdac", FUNC(ramdac_device::mask_w)); // word write?
map(0x740000, 0x740001).w("soundlatch", FUNC(generic_latch_16_device::write));
map(0x760000, 0x760001).w(this, FUNC(wheelfir_state::coin_cnt_w));
map(0x780000, 0x780005).nopw(); // Start ADC0808 conversion
map(0x780000, 0x780001).portr("STEERING");
map(0x780002, 0x780003).portr("ACCELERATOR");
map(0x780004, 0x780005).portr("BRAKE");
map(0x780000, 0x78000f).rw("adc", FUNC(adc0808_device::data_r), FUNC(adc0808_device::address_offset_start_w)).umask16(0x00ff);
map(0x7a0000, 0x7a0001).w(this, FUNC(wheelfir_state::wheelfir_scanline_cnt_w));
map(0x7c0000, 0x7c0001).rw(this, FUNC(wheelfir_state::wheelfir_7c0000_r), FUNC(wheelfir_state::wheelfir_7c0000_w));
map(0x7e0000, 0x7e0001).portr("P1");
@ -658,7 +625,7 @@ static INPUT_PORTS_START( wheelfir )
PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_COIN1 )
PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_COIN2 )
PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_SERVICE ) PORT_NAME( "Test" )
PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_UNUSED ) /* net comm flag ? */
PORT_BIT( 0x2000, IP_ACTIVE_HIGH, IPT_OTHER ) PORT_READ_LINE_DEVICE_MEMBER(DEVICE_SELF, wheelfir_state, adc_eoc_r)
PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_UNUSED )
@ -683,6 +650,16 @@ static INPUT_PORTS_START( wheelfir )
PORT_BIT(0xff, 0x00, IPT_PEDAL2) PORT_INVERT PORT_SENSITIVITY(100) PORT_KEYDELTA(10) PORT_NAME("Brake Pedal") PORT_MINMAX(0x00, 0xff) PORT_REVERSE
INPUT_PORTS_END
READ_LINE_MEMBER( wheelfir_state::adc_eoc_r )
{
return m_adc_eoc;
}
WRITE_LINE_MEMBER( wheelfir_state::adc_eoc_w )
{
m_adc_eoc = state;
}
TIMER_DEVICE_CALLBACK_MEMBER(wheelfir_state::scanline_timer_callback)
{
if(param<NUM_SCANLINES)
@ -764,6 +741,11 @@ MACHINE_CONFIG_START(wheelfir_state::wheelfir)
//MCFG_QUANTUM_TIME(attotime::from_hz(12000))
MCFG_DEVICE_ADD("adc", ADC0808, 500000) // unknown clock
MCFG_ADC0808_EOC_FF_CB(WRITELINE(wheelfir_state, adc_eoc_w))
MCFG_ADC0808_IN0_CB(IOPORT("STEERING"))
MCFG_ADC0808_IN1_CB(IOPORT("ACCELERATOR"))
MCFG_ADC0808_IN2_CB(IOPORT("BRAKE"))
MCFG_TIMER_DRIVER_ADD_SCANLINE("scan_timer", wheelfir_state, scanline_timer_callback, "screen", 0, 1)