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qix.c: Let's not regenerate the entire palette every time we do a partial update [Alex Jackson]

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This commit is contained in:
Alex W. Jackson 2014-02-02 12:48:01 +00:00
parent a2da57f494
commit 931027822a
2 changed files with 34 additions and 45 deletions
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19
src/mame/includes/qix.h
View File

@ -19,8 +19,6 @@
#define QIX_CHARACTER_CLOCK (20000000/2/16)
#define NUM_PENS (0x100)
class qix_state : public driver_device
{
public:
@ -30,6 +28,7 @@ public:
m_audiocpu(*this, "audiocpu"),
m_videocpu(*this, "videocpu"),
m_mcu(*this, "mcu"),
m_crtc(*this, "vid_u18"),
m_pia0(*this, "pia0"),
m_pia1(*this, "pia1"),
m_pia2(*this, "pia2"),
@ -38,14 +37,14 @@ public:
m_sndpia2(*this, "sndpia2"),
m_sn1 (*this, "sn1"),
m_sn2 (*this, "sn2"),
m_discrete(*this, "discrete"),
m_68705_port_out(*this, "68705_port_out"),
m_68705_ddr(*this, "68705_ddr"),
m_paletteram(*this, "paletteram"),
m_videoram(*this, "videoram"),
m_videoram_address(*this, "videoram_addr"),
m_videoram_mask(*this, "videoram_mask"),
m_paletteram(*this, "paletteram"),
m_scanline_latch(*this, "scanline_latch"),
m_discrete(*this, "discrete"),
m_bank0(*this, "bank0"),
m_bank1(*this, "bank1") { }
@ -54,6 +53,7 @@ public:
optional_device<cpu_device> m_audiocpu;
required_device<m6809_base_device> m_videocpu;
optional_device<cpu_device> m_mcu;
required_device<mc6845_device> m_crtc;
required_device<pia6821_device> m_pia0;
required_device<pia6821_device> m_pia1;
required_device<pia6821_device> m_pia2;
@ -62,6 +62,7 @@ public:
optional_device<pia6821_device> m_sndpia2;
optional_device<sn76489_device> m_sn1;
optional_device<sn76489_device> m_sn2;
optional_device<discrete_device> m_discrete;
/* machine state */
optional_shared_ptr<UINT8> m_68705_port_out;
@ -70,18 +71,18 @@ public:
UINT8 m_coinctrl;
/* video state */
required_shared_ptr<UINT8> m_paletteram;
optional_shared_ptr<UINT8> m_videoram;
required_shared_ptr<UINT8> m_videoram_address;
optional_shared_ptr<UINT8> m_videoram_mask;
required_shared_ptr<UINT8> m_paletteram;
required_shared_ptr<UINT8> m_scanline_latch;
UINT8 m_flip;
UINT8 m_palette_bank;
UINT8 m_leds;
required_shared_ptr<UINT8> m_scanline_latch;
optional_device<discrete_device> m_discrete;
optional_memory_bank m_bank0;
optional_memory_bank m_bank1;
pen_t m_pens[NUM_PENS];
pen_t m_pens[0x400];
DECLARE_WRITE8_MEMBER(zookeep_bankswitch_w);
DECLARE_WRITE8_MEMBER(qix_data_firq_w);
DECLARE_WRITE8_MEMBER(qix_data_firq_ack_w);
@ -132,7 +133,7 @@ public:
DECLARE_WRITE8_MEMBER(slither_coinctl_w);
DECLARE_WRITE_LINE_MEMBER(qix_pia_dint);
DECLARE_WRITE_LINE_MEMBER(qix_pia_sint);
void get_pens(pen_t *pens);
void set_pen(int offs);
int kram3_permut1(int idx, int value);
int kram3_permut2(int tbl_index, int idx, const UINT8 *xor_table);
int kram3_decrypt(int address, int value);

60
src/mame/video/qix.c
View File

@ -13,16 +13,6 @@
/*************************************
*
* Device tag
*
*************************************/
#define MC6845_TAG ("vid_u18")
/*************************************
*
* Static function prototypes
@ -46,6 +36,10 @@ VIDEO_START_MEMBER(qix_state,qix)
/* allocate memory for the full video RAM */
m_videoram.allocate(256 * 256);
/* initialize the palette */
for (int x = 0; x < 0x400; x++)
set_pen(x);
/* set up save states */
save_item(NAME(m_flip));
save_item(NAME(m_palette_bank));
@ -65,8 +59,8 @@ WRITE_LINE_MEMBER(qix_state::display_enable_changed)
/* on the rising edge, latch the scanline */
if (state)
{
UINT16 ma = downcast<mc6845_device *>(machine().device(MC6845_TAG))->get_ma();
UINT8 ra = downcast<mc6845_device *>(machine().device(MC6845_TAG))->get_ra();
UINT16 ma = m_crtc->get_ma();
UINT8 ra = m_crtc->get_ra();
/* RA0-RA2 goes to D0-D2 and MA5-MA9 goes to D3-D7 */
*m_scanline_latch = ((ma >> 2) & 0xf8) | (ra & 0x07);
@ -208,6 +202,8 @@ WRITE8_MEMBER(qix_state::qix_paletteram_w)
if (((offset >> 8) == m_palette_bank) &&
(old_data != data))
m_screen->update_now();
set_pen(offset);
}
@ -225,10 +221,8 @@ WRITE8_MEMBER(qix_state::qix_palettebank_w)
}
void qix_state::get_pens( pen_t *pens)
void qix_state::set_pen(int offs)
{
offs_t offs;
/* this conversion table should be about right. It gives a reasonable */
/* gray scale in the test screen, and the red, green and blue squares */
/* in the same screen are barely visible, as the manual requires. */
@ -252,24 +246,21 @@ void qix_state::get_pens( pen_t *pens)
0xff /* value = 3, intensity = 3 */
};
for (offs = m_palette_bank << 8; offs < (m_palette_bank << 8) + NUM_PENS; offs++)
{
int bits, intensity, r, g, b;
int bits, intensity, r, g, b;
UINT8 data = m_paletteram[offs];
UINT8 data = m_paletteram[offs];
/* compute R, G, B from the table */
intensity = (data >> 0) & 0x03;
bits = (data >> 6) & 0x03;
r = table[(bits << 2) | intensity];
bits = (data >> 4) & 0x03;
g = table[(bits << 2) | intensity];
bits = (data >> 2) & 0x03;
b = table[(bits << 2) | intensity];
/* compute R, G, B from the table */
intensity = (data >> 0) & 0x03;
bits = (data >> 6) & 0x03;
r = table[(bits << 2) | intensity];
bits = (data >> 4) & 0x03;
g = table[(bits << 2) | intensity];
bits = (data >> 2) & 0x03;
b = table[(bits << 2) | intensity];
/* update the palette */
pens[offs & 0xff] = MAKE_RGB(r, g, b);
}
/* update the palette */
m_pens[offs] = MAKE_RGB(r, g, b);
}
@ -290,10 +281,7 @@ static MC6845_BEGIN_UPDATE( begin_update )
popmessage("self test leds: %d%d %d%d%d%d",BIT(leds,7),BIT(leds,5),BIT(leds,6),BIT(leds,4),BIT(leds,2),BIT(leds,3));
#endif
/* create the pens */
state->get_pens(state->m_pens);
return state->m_pens;
return &(state->m_pens)[state->m_palette_bank << 8];
}
@ -421,11 +409,11 @@ MACHINE_CONFIG_FRAGMENT( qix_video )
MCFG_VIDEO_START_OVERRIDE(qix_state,qix)
MCFG_MC6845_ADD(MC6845_TAG, MC6845, "screen", QIX_CHARACTER_CLOCK, mc6845_intf)
MCFG_MC6845_ADD("vid_u18", MC6845, "screen", QIX_CHARACTER_CLOCK, mc6845_intf)
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_RAW_PARAMS(QIX_CHARACTER_CLOCK*8, 0x148, 0, 0x100, 0x111, 0, 0x100) /* from CRTC */
MCFG_SCREEN_UPDATE_DEVICE(MC6845_TAG, mc6845_device, screen_update)
MCFG_SCREEN_UPDATE_DEVICE("vid_u18", mc6845_device, screen_update)
MACHINE_CONFIG_END