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improve trench colors in space encounters and simulate screen flash

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effect.
This commit is contained in:
qwijibo 2016-04-30 16:30:09 -05:00
parent 97e2520a6a
commit cdfb62795a
3 changed files with 57 additions and 30 deletions
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31
src/mame/drivers/mw8080bw.cpp
View File

@ -58,7 +58,6 @@
"Extra Inning" as "Ball Park II".
Known issues/to-do's:
* Space Encounters: verify trench colors
* Space Encounters: verify strobe light frequency
* Phantom II: cloud generator is implemented according to the schematics,
but it doesn't look right. Cloud color mixing to be verified as well
@ -2119,28 +2118,12 @@ MACHINE_START_MEMBER(mw8080bw_state,spcenctr)
save_item(NAME(m_spcenctr_trench_width));
save_item(NAME(m_spcenctr_trench_center));
save_item(NAME(m_spcenctr_trench_slope));
save_item(NAME(m_spcenctr_bright_control));
save_item(NAME(m_spcenctr_brightness));
MACHINE_START_CALL_MEMBER(mw8080bw);
}
#if 0
UINT8 mw8080bw_state::spcenctr_get_trench_width()
{
return m_spcenctr_trench_width;
}
UINT8 mw8080bw_state::spcenctr_get_trench_center()
{
return m_spcenctr_trench_center;
}
UINT8 mw8080bw_state::spcenctr_get_trench_slope(UINT8 addr )
{
return m_spcenctr_trench_slope[addr & 0x0f];
}
#endif
WRITE8_MEMBER(mw8080bw_state::spcenctr_io_w)
{ /* A7 A6 A5 A4 A3 A2 A1 A0 */
@ -2166,7 +2149,15 @@ WRITE8_MEMBER(mw8080bw_state::spcenctr_io_w)
m_spcenctr_trench_center = data; /* - - - - - 1 0 0 */
else if ((offset & 0x07) == 0x07)
m_spcenctr_trench_width = data; /* - - - - - 1 1 1 */
m_spcenctr_trench_width = data; /* - - - - - 1 1 1 */
else if ((offset & 0x07) == 0x00)
// hex flip-flop B5
// bit 3: /BRITE
// bit 2: /NO_PLANET
// bit 1: /SET_WSL
// bit 0: COIN_COUNTER
m_spcenctr_bright_control = ~data & 0x08; /* - - - - - 0 0 0 */
else
logerror("%04x: Unmapped I/O port write to %02x = %02x\n", space.device().safe_pc(), offset, data);

2
src/mame/includes/mw8080bw.h
View File

@ -82,6 +82,8 @@ public:
UINT8 m_spcenctr_trench_width;
UINT8 m_spcenctr_trench_center;
UINT8 m_spcenctr_trench_slope[16]; /* 16x4 bit RAM */
UINT8 m_spcenctr_bright_control;
UINT8 m_spcenctr_brightness;
/* timer */
emu_timer *m_interrupt_timer;

54
src/mame/video/mw8080bw.cpp
View File

@ -68,13 +68,31 @@ UINT32 mw8080bw_state::screen_update_mw8080bw(screen_device &screen, bitmap_rgb3
*
*************************************/
/* video signals mixed via R2 open collector nand gates and 'brite' RC circuit
#define PHANTOM2_BOTTOM_TRENCH_DARK_RGB32_PEN rgb_t::black
#define PHANTOM2_BOTTOM_TRENCH_LIGHT_RGB32_PEN rgb_t(0x5a, 0x5a, 0x5a)
#define PHANTOM2_TOP_TRENCH_DARK_RGB32_PEN rgb_t::black
#define PHANTOM2_TOP_TRENCH_LIGHT_RGB32_PEN rgb_t::white
#define PHANTOM2_SIDE_TRENCH_DARK_RGB32_PEN rgb_t::black
#define PHANTOM2_SIDE_TRENCH_LIGHT_RGB32_PEN rgb_t(0x72, 0x72, 0x72)
* when /BRITE lo, cap C23 discharge rapidly, disabling Q2, overpowering all other video signals
* when /BRITE hi, cap C23 charge through 10k res, brite voltage decrease to 0 over approx 0.4 sec
* inverted video data is fed into R2 nand gates:
* when /VIDEO lo, all gates open for max brightness
* max V = (5 - 0.7) * 470 / (470 + 100) = 3.5 V
* when /video hi, pin 5 always gnd, max = 3 V, min = 1 V
* (guess) pin 11 state controls trench color
* (guess) pin 3 low for trench side
* (guess) pin 8 low for trench floor
* thus, trench side: 1.4 or 2.2 V
* trench floor: 1.3 or 2.0 V
* trech top: 1.8 or 3 V
* scaled to 3.2 V = 255, 1.2 V = 0 (arbitrary values chosen to match video)
*/
#define SPCENCTR_TOP_TRENCH_DARK_RGB32_PEN rgb_t(0x4d, 0x4d, 0x4d)
#define SPCENCTR_TOP_TRENCH_LIGHT_RGB32_PEN rgb_t(0xe6, 0xe6, 0xe6)
#define SPCENCTR_SIDE_TRENCH_DARK_RGB32_PEN rgb_t(0x1a, 0x1a, 0x1a)
#define SPCENCTR_SIDE_TRENCH_LIGHT_RGB32_PEN rgb_t(0x80, 0x80, 0x80)
#define SPCENCTR_BOTTOM_TRENCH_DARK_RGB32_PEN rgb_t(0x0d, 0x0d, 0x0d)
#define SPCENCTR_BOTTOM_TRENCH_LIGHT_RGB32_PEN rgb_t(0x66, 0x66, 0x66)
#define SPCENCTR_BRIGHTNESS_DECAY 10
UINT32 mw8080bw_state::screen_update_spcenctr(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
@ -93,6 +111,13 @@ UINT32 mw8080bw_state::screen_update_spcenctr(screen_device &screen, bitmap_rgb3
memset(line_buf, 0, 256);
if(m_spcenctr_bright_control)
m_spcenctr_brightness = 255;
else if(m_spcenctr_brightness > SPCENCTR_BRIGHTNESS_DECAY)
m_spcenctr_brightness -= SPCENCTR_BRIGHTNESS_DECAY;
else
m_spcenctr_brightness = 0;
while (1)
{
/* plot the current pixel */
@ -105,13 +130,13 @@ UINT32 mw8080bw_state::screen_update_spcenctr(screen_device &screen, bitmap_rgb3
line_buf[x] = draw_line;
if (!bit)
pen = draw_line ? PHANTOM2_TOP_TRENCH_LIGHT_RGB32_PEN : PHANTOM2_TOP_TRENCH_DARK_RGB32_PEN;
pen = draw_line ? SPCENCTR_TOP_TRENCH_LIGHT_RGB32_PEN : SPCENCTR_TOP_TRENCH_DARK_RGB32_PEN;
}
/* sides of trench? */
else if (!(floor_width & 0x80) && (draw_trench || draw_floor))
{
if (!bit)
pen = line_buf[x] ? PHANTOM2_SIDE_TRENCH_LIGHT_RGB32_PEN : PHANTOM2_SIDE_TRENCH_DARK_RGB32_PEN;
pen = line_buf[x] ? SPCENCTR_SIDE_TRENCH_LIGHT_RGB32_PEN : SPCENCTR_SIDE_TRENCH_DARK_RGB32_PEN;
}
/* bottom of trench? */
else if (draw_floor)
@ -119,9 +144,12 @@ UINT32 mw8080bw_state::screen_update_spcenctr(screen_device &screen, bitmap_rgb3
line_buf[x] = line_buf[x - 1];
if (!bit)
pen = line_buf[x] ? PHANTOM2_BOTTOM_TRENCH_LIGHT_RGB32_PEN : PHANTOM2_BOTTOM_TRENCH_DARK_RGB32_PEN;
pen = line_buf[x] ? SPCENCTR_BOTTOM_TRENCH_LIGHT_RGB32_PEN : SPCENCTR_BOTTOM_TRENCH_DARK_RGB32_PEN;
}
if(m_spcenctr_brightness > (pen & 0xff))
pen = rgb_t(m_spcenctr_brightness, m_spcenctr_brightness, m_spcenctr_brightness);
bitmap.pix32(y - MW8080BW_VCOUNTER_START_NO_VBLANK, x) = pen;
center = center + 1;
@ -143,7 +171,13 @@ UINT32 mw8080bw_state::screen_update_spcenctr(screen_device &screen, bitmap_rgb3
for (i = 0; i < 4; i++)
{
pen = (video_data & 0x01) ? rgb_t::white : rgb_t::black;
if(video_data & 0x01)
pen = rgb_t::white;
else if(m_spcenctr_brightness)
pen = rgb_t(m_spcenctr_brightness, m_spcenctr_brightness, m_spcenctr_brightness);
else
pen = rgb_t::black;
bitmap.pix32(y - MW8080BW_VCOUNTER_START_NO_VBLANK, 256 + i) = pen;
video_data = video_data >> 1;