Gerold55
/
mame
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

maxrpm: Add ADC0844 (nw)

master
AJR 2017-11-07 20:14:34 -05:00
parent 5c2ab4e053
commit 805d5427ba
2 changed files with 19 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
src/mame/drivers/mcr3.cpp
View File

@ -233,8 +233,8 @@ READ8_MEMBER(mcr3_state::maxrpm_ip2_r)
WRITE8_MEMBER(mcr3_state::maxrpm_op5_w)
{
/* latch the low 4 bits as input to the ADC0844 */
m_maxrpm_adc_control = data & 0x0f;
/* latch bits 1-4 as input to the ADC0844 */
m_maxrpm_adc_control = (data >> 1) & 0x0f;
/* remaining bits go to standard connections */
mcrmono_control_port_w(space, offset, data);
@ -243,12 +243,12 @@ WRITE8_MEMBER(mcr3_state::maxrpm_op5_w)
WRITE8_MEMBER(mcr3_state::maxrpm_op6_w)
{
static const char *const inputs[] = { "MONO.IP1", "MONO.IP1.ALT1", "MONO.IP1.ALT2", "MONO.IP1.ALT3" };
/*
Reflective Sensor Control:
4 bits of input from OP5 are routed to a transceiver at U2, and
ultimately on to the low 4 I/O pins of the ADC0844. The /EN on
the transceiver is directly connected to J2-2.
the transceiver is directly connected to J2-2. Note that two bits
get swapped in the process: OP53 = MA3 and OP54 = MA2.
In order to perform a read or a write to the ADC0844, the /RD and
/WR signals are directly controlled via J2-8 and J2-7 respectively.
@ -264,13 +264,11 @@ WRITE8_MEMBER(mcr3_state::maxrpm_op6_w)
/* when the read is toggled is when the ADC value is latched */
if (!(data & 0x80))
m_latched_input = ioport(inputs[m_maxrpm_adc_select])->read();
m_latched_input = m_maxrpm_adc->read(space, 0);
/* when both the write and the enable are low, it's a write to the ADC0844 */
/* unfortunately the behavior below doesn't match up with the inputs on the */
/* schematics and wiring diagrams, so they must be wrong */
if (!(data & 0x40) && !(data & 0x20))
m_maxrpm_adc_select = (m_maxrpm_adc_control >> 1) & 3;
m_maxrpm_adc->write(space, 0, BITSWAP8(m_maxrpm_adc_control, 7, 6, 5, 4, 2, 3, 1, 0));
/* low 5 bits control the turbo CS */
m_turbo_cheap_squeak->write(space, offset, data);
@ -1136,6 +1134,14 @@ static MACHINE_CONFIG_DERIVED( mono_tcs, mcrmono )
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 1.0)
MACHINE_CONFIG_END
static MACHINE_CONFIG_DERIVED( maxrpm, mono_tcs )
MCFG_ADC0844_ADD("adc")
MCFG_ADC0844_CH1_CB(IOPORT("MONO.IP1"))
MCFG_ADC0844_CH2_CB(IOPORT("MONO.IP1.ALT1"))
MCFG_ADC0844_CH3_CB(IOPORT("MONO.IP1.ALT2"))
MCFG_ADC0844_CH4_CB(IOPORT("MONO.IP1.ALT3"))
MACHINE_CONFIG_END
/* Rampage/Power Drive/Star Guards = MCR monoboard with Sounds Good */
static MACHINE_CONFIG_DERIVED( mono_sg, mcrmono )
@ -1581,7 +1587,6 @@ DRIVER_INIT_MEMBER(mcr3_state,maxrpm)
m_maincpu->space(AS_IO).install_write_handler(0x06, 0x06, write8_delegate(FUNC(mcr3_state::maxrpm_op6_w),this));
save_item(NAME(m_maxrpm_adc_control));
save_item(NAME(m_maxrpm_adc_select));
save_item(NAME(m_maxrpm_last_shift));
save_item(NAME(m_maxrpm_p1_shift));
save_item(NAME(m_maxrpm_p2_shift));
@ -1664,7 +1669,7 @@ DRIVER_INIT_MEMBER(mcr3_state,turbotag)
/* MCR monoboard games */
GAME( 1984, demoderm, demoderb, mono_tcs, demoderm, mcr3_state, demoderm, ROT0, "Bally Midway", "Demolition Derby (MCR-3 Mono Board Version)", MACHINE_SUPPORTS_SAVE )
GAME( 1985, sarge, 0, mono_tcs, sarge, mcr3_state, sarge, ROT0, "Bally Midway", "Sarge", MACHINE_SUPPORTS_SAVE )
GAME( 1986, maxrpm, 0, mono_tcs, maxrpm, mcr3_state, maxrpm, ROT0, "Bally Midway", "Max RPM (ver 2)", MACHINE_SUPPORTS_SAVE )
GAME( 1986, maxrpm, 0, maxrpm, maxrpm, mcr3_state, maxrpm, ROT0, "Bally Midway", "Max RPM (ver 2)", MACHINE_SUPPORTS_SAVE )
GAME( 1986, rampage, 0, mono_sg, rampage, mcr3_state, rampage, ROT0, "Bally Midway", "Rampage (Rev 3, 8/27/86)", MACHINE_SUPPORTS_SAVE )
GAME( 1986, rampage2, rampage, mono_sg, rampage, mcr3_state, rampage, ROT0, "Bally Midway", "Rampage (Rev 2, 8/4/86)", MACHINE_SUPPORTS_SAVE )
GAME( 1986, powerdrv, 0, mono_sg, powerdrv, mcr3_state, powerdrv, ROT0, "Bally Midway", "Power Drive", MACHINE_SUPPORTS_SAVE )

5
src/mame/includes/mcr3.h
View File

@ -5,6 +5,8 @@
Midway MCR-3 system
**************************************************************************/
#include "machine/adc0844.h"
#include "screen.h"
class mcr3_state : public mcr_state
@ -13,17 +15,18 @@ public:
mcr3_state(const machine_config &mconfig, device_type type, const char *tag)
: mcr_state(mconfig, type, tag),
m_spyhunt_alpharam(*this, "spyhunt_alpha"),
m_maxrpm_adc(*this, "adc"),
m_screen(*this, "screen")
{ }
optional_shared_ptr<uint8_t> m_spyhunt_alpharam;
optional_device<adc0844_device> m_maxrpm_adc;
required_device<screen_device> m_screen;
uint8_t m_input_mux;
uint8_t m_latched_input;
uint8_t m_last_op4;
uint8_t m_maxrpm_adc_control;
uint8_t m_maxrpm_adc_select;
uint8_t m_maxrpm_last_shift;
int8_t m_maxrpm_p1_shift;
int8_t m_maxrpm_p2_shift;