// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
Atari Jaguar hardware
****************************************************************************
------------------------------------------------------------
TOM REGISTERS
------------------------------------------------------------
F00000-F0FFFF R/W xxxxxxxx xxxxxxxx Internal Registers
F00000 R/W -x-xx--- xxxxxxxx MEMCON1 - memory config reg 1
-x------ -------- (CPU32 - is the CPU 32bits?)
---xx--- -------- (IOSPEED - external I/O clock cycles)
-------- x------- (FASTROM - reduces ROM clock cycles)
-------- -xx----- (DRAMSPEED - sets RAM clock cycles)
-------- ---xx--- (ROMSPEED - sets ROM clock cycles)
-------- -----xx- (ROMWIDTH - sets width of ROM: 8,16,32,64 bits)
-------- -------x (ROMHI - controls ROM mapping)
F00002 R/W --xxxxxx xxxxxxxx MEMCON2 - memory config reg 2
--x----- -------- (HILO - image display bit order)
---x---- -------- (BIGEND - big endian addressing?)
----xxxx -------- (REFRATE - DRAM refresh rate)
-------- xx------ (DWIDTH1 - DRAM1 width: 8,16,32,64 bits)
-------- --xx---- (COLS1 - DRAM1 columns: 256,512,1024,2048)
-------- ----xx-- (DWIDTH0 - DRAM0 width: 8,16,32,64 bits)
-------- ------xx (COLS0 - DRAM0 columns: 256,512,1024,2048)
F00004 R/W -----xxx xxxxxxxx HC - horizontal count
-----x-- -------- (which half of the display)
------xx xxxxxxxx (10-bit counter)
F00006 R/W ----xxxx xxxxxxxx VC - vertical count
----x--- -------- (which field is being generated)
-----xxx xxxxxxxx (11-bit counter)
F00008 R -----xxx xxxxxxxx LPH - light pen horizontal position
F0000A R -----xxx xxxxxxxx LPV - light pen vertical position
F00010-F00017 R xxxxxxxx xxxxxxxx OB - current object code from the graphics processor
F00020-F00023 W xxxxxxxx xxxxxxxx OLP - start of the object list
F00026 W -------- -------x OBF - object processor flag
F00028 W ----xxxx xxxxxxxx VMODE - video mode
W ----xxx- -------- (PWIDTH1-8 - width of pixel in video clock cycles)
W -------x -------- (VARMOD - enable variable color resolution)
W -------- x------- (BGEN - clear line buffere to BG color)
W -------- -x------ (CSYNC - enable composite sync on VSYNC)
W -------- --x----- (BINC - local border color if INCEN)
W -------- ---x---- (INCEN - encrustation enable)
W -------- ----x--- (GENLOCK - enable genlock)
W -------- -----xx- (MODE - CRY16,RGB24,DIRECT16,RGB16)
W -------- -------x (VIDEN - enables video)
F0002A W xxxxxxxx xxxxxxxx BORD1 - border color (red/green)
F0002C W -------- xxxxxxxx BORD2 - border color (blue)
F0002E W ------xx xxxxxxxx HP - horizontal period
F00030 W -----xxx xxxxxxxx HBB - horizontal blanking begin
F00032 W -----xxx xxxxxxxx HBE - horizontal blanking end
F00034 W -----xxx xxxxxxxx HSYNC - horizontal sync
F00036 W ------xx xxxxxxxx HVS - horizontal vertical sync
F00038 W -----xxx xxxxxxxx HDB1 - horizontal display begin 1
F0003A W -----xxx xxxxxxxx HDB2 - horizontal display begin 2
F0003C W -----xxx xxxxxxxx HDE - horizontal display end
F0003E W -----xxx xxxxxxxx VP - vertical period
F00040 W -----xxx xxxxxxxx VBB - vertical blanking begin
F00042 W -----xxx xxxxxxxx VBE - vertical blanking end
F00044 W -----xxx xxxxxxxx VS - vertical sync
F00046 W -----xxx xxxxxxxx VDB - vertical display begin
F00048 W -----xxx xxxxxxxx VDE - vertical display end
F0004A W -----xxx xxxxxxxx VEB - vertical equalization begin
F0004C W -----xxx xxxxxxxx VEE - vertical equalization end
F0004E W -----xxx xxxxxxxx VI - vertical interrupt
F00050 W xxxxxxxx xxxxxxxx PIT0 - programmable interrupt timer 0
F00052 W xxxxxxxx xxxxxxxx PIT1 - programmable interrupt timer 1
F00054 W ------xx xxxxxxxx HEQ - horizontal equalization end
F00058 W xxxxxxxx xxxxxxxx BG - background color
F000E0 R/W ---xxxxx ---xxxxx INT1 - CPU interrupt control register
---x---- -------- (C_JERCLR - clear pending Jerry ints)
----x--- -------- (C_PITCLR - clear pending PIT ints)
-----x-- -------- (C_OPCLR - clear pending object processor ints)
------x- -------- (C_GPUCLR - clear pending graphics processor ints)
-------x -------- (C_VIDCLR - clear pending video timebase ints)
-------- ---x---- (C_JERENA - enable Jerry ints)
-------- ----x--- (C_PITENA - enable PIT ints)
-------- -----x-- (C_OPENA - enable object processor ints)
-------- ------x- (C_GPUENA - enable graphics processor ints)
-------- -------x (C_VIDENA - enable video timebase ints)
F000E2 W -------- -------- INT2 - CPU interrupt resume register
F00400-F005FF R/W xxxxxxxx xxxxxxxx CLUT - color lookup table A
F00600-F007FF R/W xxxxxxxx xxxxxxxx CLUT - color lookup table B
F00800-F00D9F R/W xxxxxxxx xxxxxxxx LBUF - line buffer A
F01000-F0159F R/W xxxxxxxx xxxxxxxx LBUF - line buffer B
F01800-F01D9F R/W xxxxxxxx xxxxxxxx LBUF - line buffer currently selected
------------------------------------------------------------
F02000-F021FF R/W xxxxxxxx xxxxxxxx GPU control registers
F02100 R/W xxxxxxxx xxxxxxxx G_FLAGS - GPU flags register
R/W x------- -------- (DMAEN - DMA enable)
R/W -x------ -------- (REGPAGE - register page)
W --x----- -------- (G_BLITCLR - clear blitter interrupt)
W ---x---- -------- (G_OPCLR - clear object processor int)
W ----x--- -------- (G_PITCLR - clear PIT interrupt)
W -----x-- -------- (G_JERCLR - clear Jerry interrupt)
W ------x- -------- (G_CPUCLR - clear CPU interrupt)
R/W -------x -------- (G_BLITENA - enable blitter interrupt)
R/W -------- x------- (G_OPENA - enable object processor int)
R/W -------- -x------ (G_PITENA - enable PIT interrupt)
R/W -------- --x----- (G_JERENA - enable Jerry interrupt)
R/W -------- ---x---- (G_CPUENA - enable CPU interrupt)
R/W -------- ----x--- (IMASK - interrupt mask)
R/W -------- -----x-- (NEGA_FLAG - ALU negative)
R/W -------- ------x- (CARRY_FLAG - ALU carry)
R/W -------- -------x (ZERO_FLAG - ALU zero)
F02104 W -------- ----xxxx G_MTXC - matrix control register
W -------- ----x--- (MATCOL - column/row major)
W -------- -----xxx (MATRIX3-15 - matrix width)
F02108 W ----xxxx xxxxxx-- G_MTXA - matrix address register
F0210C W -------- -----xxx G_END - data organization register
W -------- -----x-- (BIG_INST - big endian instruction fetch)
W -------- ------x- (BIG_PIX - big endian pixels)
W -------- -------x (BIG_IO - big endian I/O)
F02110 R/W xxxxxxxx xxxxxxxx G_PC - GPU program counter
F02114 R/W xxxxxxxx xx-xxxxx G_CTRL - GPU control/status register
R xxxx---- -------- (VERSION - GPU version code)
R/W ----x--- -------- (BUS_HOG - hog the bus!)
R/W -----x-- -------- (G_BLITLAT - blitter interrupt latch)
R/W ------x- -------- (G_OPLAT - object processor int latch)
R/W -------x -------- (G_PITLAT - PIT interrupt latch)
R/W -------- x------- (G_JERLAT - Jerry interrupt latch)
R/W -------- -x------ (G_CPULAT - CPU interrupt latch)
R/W -------- ---x---- (SINGLE_GO - single step one instruction)
R/W -------- ----x--- (SINGLE_STEP - single step mode)
R/W -------- -----x-- (FORCEINT0 - cause interrupt 0 on GPU)
R/W -------- ------x- (CPUINT - send GPU interrupt to CPU)
R/W -------- -------x (GPUGO - enable GPU execution)
F02118-F0211B R/W xxxxxxxx xxxxxxxx G_HIDATA - high data register
F0211C-F0211F R xxxxxxxx xxxxxxxx G_REMAIN - divide unit remainder
F0211C W -------- -------x G_DIVCTRL - divide unit control
W -------- -------x (DIV_OFFSET - 1=16.16 divide, 0=32-bit divide)
------------------------------------------------------------
****************************************************************************/
#include "emu.h"
#include "cpu/mips/mips1.h"
#include "cpu/m68000/m68000.h"
#include "includes/jaguar.h"
#include "jagblit.h"
#define ENABLE_BORDERS 0
#define LOG_BLITS 0
#define LOG_BAD_BLITS 0
#define LOG_BLITTER_STATS 0
#define LOG_BLITTER_WRITE 0
#define LOG_UNHANDLED_BLITS 0
// interrupts to main CPU:
// 0 = video (on the VI scanline)
// 1 = GPU (write from GPU coprocessor)
// 2 = object (stop object interrupt in display list)
// 3 = timer (from the PIT)
// 4 = jerry
/* GPU registers */
enum
{
MEMCON1, MEMCON2, HC, VC,
LPH, LPV, GPU0, GPU1,
OB_HH, OB_HL, OB_LH, OB_LL,
GPU2, GPU3, GPU4, GPU5,
OLP_L, OLP_H, GPU6, OBF,
VMODE, BORD1, BORD2, HP,
HBB, HBE, HSYNC, HVS,
HDB1, HDB2, HDE, VP,
VBB, VBE, VS, VDB,
VDE, VEB, VEE, VI,
PIT0, PIT1, HEQ, GPU7,
BG,
INT1 = 0xe0/2,
INT2,
GPU_REGS
};
/*************************************
*
* Prototypes
*
*************************************/
/*************************************
*
* Compute X/Y coordinates
*
*************************************/
inline void jaguar_state::get_crosshair_xy(int player, int &x, int &y)
{
const rectangle &visarea = m_screen->visible_area();
/* only 2 lightguns are connected */
x = visarea.left() + (((ioport(player ? "FAKE2_X" : "FAKE1_X")->read() & 0xff) * visarea.width()) >> 8);
y = visarea.top() + (((ioport(player ? "FAKE2_Y" : "FAKE1_Y")->read() & 0xff) * visarea.height()) >> 8);
}
/*************************************
*
* Horizontal display values
*
*************************************/
inline int jaguar_state::effective_hvalue(int value)
{
if (!(value & 0x400))
return value & 0x3ff;
else
return (value & 0x3ff) + (m_gpu_regs[HP] & 0x3ff) + 1;
}
/*************************************
*
* Object processor timer
*
*************************************/
inline bool jaguar_state::adjust_object_timer(int vc)
{
/* extract the display begin registers */
int hdbpix[2];
hdbpix[0] = (m_gpu_regs[HDB1] & 0x7ff) / 2;
hdbpix[1] = (m_gpu_regs[HDB2] & 0x7ff) / 2;
/* sort */
if (hdbpix[0] > hdbpix[1])
{
int temp = hdbpix[0];
hdbpix[0] = hdbpix[1];
hdbpix[1] = temp;
}
/* select the target one */
int hdb = hdbpix[vc % 2];
/* if setting the second one in a line, make sure we will ever actually hit it */
if (vc % 2 == 1 && (hdbpix[1] == hdbpix[0] || hdbpix[1] >= m_screen->width()))
return false;
/* adjust the timer */
m_object_timer->adjust(m_screen->time_until_pos(vc / 2, hdb), vc | (hdb << 16));
return true;
}
/*************************************
*
* Main CPU interrupts
*
*************************************/
void jaguar_state::update_cpu_irq()
{
if ((m_cpu_irq_state & m_gpu_regs[INT1] & 0x1f) != 0)
m_maincpu->set_input_line(m_is_r3000 ? INPUT_LINE_IRQ4 : M68K_IRQ_6, ASSERT_LINE);
else
m_maincpu->set_input_line(m_is_r3000 ? INPUT_LINE_IRQ4 : M68K_IRQ_6, CLEAR_LINE);
}
WRITE_LINE_MEMBER( jaguar_state::gpu_cpu_int )
{
m_cpu_irq_state |= 2;
update_cpu_irq();
}
WRITE_LINE_MEMBER( jaguar_state::dsp_cpu_int )
{
m_cpu_irq_state |= 16;
update_cpu_irq();
}
/*************************************
*
* Palette init
*
*************************************/
void jaguar_state::jagpal_ycc(palette_device &palette) const
{
// construct YCC Color lookup
static const uint8_t red_lookup[256] =
{
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 19, 0,
68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 64, 43, 21, 0,
102,102,102,102,102,102,102,102,102,102,102, 95, 71, 47, 23, 0,
135,135,135,135,135,135,135,135,135,135,130,104, 78, 52, 26, 0,
169,169,169,169,169,169,169,169,169,170,141,113, 85, 56, 28, 0,
203,203,203,203,203,203,203,203,203,183,153,122, 91, 61, 30, 0,
237,237,237,237,237,237,237,237,230,197,164,131, 98, 65, 32, 0,
255,255,255,255,255,255,255,255,247,214,181,148,115, 82, 49, 17,
255,255,255,255,255,255,255,255,255,235,204,173,143,112, 81, 51,
255,255,255,255,255,255,255,255,255,255,227,198,170,141,113, 85,
255,255,255,255,255,255,255,255,255,255,249,223,197,171,145,119,
255,255,255,255,255,255,255,255,255,255,255,248,224,200,177,153,
255,255,255,255,255,255,255,255,255,255,255,255,252,230,208,187,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,240,221,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255
};
static const uint8_t grn_lookup[256] =
{
0, 17, 34, 51, 68, 85,102,119,136,153,170,187,204,221,238,255,
0, 19, 38, 57, 77, 96,115,134,154,173,182,211,231,250,255,255,
0, 21, 43, 64, 86,107,129,150,172,193,215,236,255,255,255,255,
0, 23, 47, 71, 96,119,142,166,190,214,238,255,255,255,255,255,
0, 26, 52, 78,104,130,156,182,208,234,255,255,255,255,255,255,
0, 28, 56, 85,113,141,170,198,226,255,255,255,255,255,255,255,
0, 30, 61, 91,122,153,183,214,244,255,255,255,255,255,255,255,
0, 32, 65, 98,131,164,197,230,255,255,255,255,255,255,255,255,
0, 32, 65, 98,131,164,197,230,255,255,255,255,255,255,255,255,
0, 30, 61, 91,122,153,183,214,244,255,255,255,255,255,255,255,
0, 28, 56, 85,113,141,170,198,226,255,255,255,255,255,255,255,
0, 26, 52, 78,104,130,156,182,208,234,255,255,255,255,255,255,
0, 23, 47, 71, 96,119,142,166,190,214,238,255,255,255,255,255,
0, 21, 43, 64, 86,107,129,150,172,193,215,236,255,255,255,255,
0, 19, 38, 57, 77, 96,115,134,154,173,182,211,231,250,255,255,
0, 17, 34, 51, 68, 85,102,119,136,153,170,187,204,221,238,255
};
static const uint8_t blu_lookup[256] =
{
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,240,221,
255,255,255,255,255,255,255,255,255,255,255,255,252,230,208,187,
255,255,255,255,255,255,255,255,255,255,255,248,224,200,177,153,
255,255,255,255,255,255,255,255,255,255,249,223,197,171,145,119,
255,255,255,255,255,255,255,255,255,255,227,198,170,141,113, 85,
255,255,255,255,255,255,255,255,255,235,204,173,143,112, 81, 51,
255,255,255,255,255,255,255,255,247,214,181,148,115, 82, 49, 17,
237,237,237,237,237,237,237,237,230,197,164,131, 98, 65, 32, 0,
203,203,203,203,203,203,203,203,203,183,153,122, 91, 61, 30, 0,
169,169,169,169,169,169,169,169,169,170,141,113, 85, 56, 28, 0,
135,135,135,135,135,135,135,135,135,135,130,104, 78, 52, 26, 0,
102,102,102,102,102,102,102,102,102,102,102, 95, 71, 47, 23, 0,
68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 68, 64, 43, 21, 0,
34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 19, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
for (int i = 0; i < 65536; i++)
{
const u8 r = (red_lookup[i >> 8] * (i & 0xff)) / 0xff;
const u8 g = (grn_lookup[i >> 8] * (i & 0xff)) / 0xff;
const u8 b = (blu_lookup[i >> 8] * (i & 0xff)) / 0xff;
palette.set_pen_color(i, rgb_t(r, g, b));
}
}
void jaguar_state::set_palette(uint16_t vmode)
{
int i;
/* switch off the mode */
switch (vmode & 0x106)
{
/* YCC full */
case 0x000:
/* RGB24 */
case 0x002:
for (i = 0; i < 65536; i++)
m_pen_table[i] = m_palette->pen(i);
break;
/* YCC VARMOD */
case 0x100:
for (i = 0; i < 65536; i++)
{
/* if the low bit is set, treat it as 5-5-5 RGB instead */
if (i & 1)
m_pen_table[i] = rgb_t(pal5bit(i >> 11), pal5bit(i >> 1), pal5bit(i >> 6));
else
m_pen_table[i] = m_palette->pen((i & ~0xff) | pal7bit(i >> 1));
}
break;
/* RGB VARMOD */
case 0x106:
for (i = 0; i < 65536; i++)
{
if (i & 1) // FIXME: controls RGB 5-5-5 / 5-6-5 format or it's just ignored? Used by UBI Soft logo in Rayman
m_pen_table[i] = rgb_t(pal5bit(i >> 11), pal5bit(i >> 1), pal5bit(i >> 6));
else
m_pen_table[i] = rgb_t(pal5bit(i >> 11), pal6bit(i >> 0), pal5bit(i >> 6));
}
break;
/* RGB full */
case 0x006:
for (i = 0; i < 65536; i++)
m_pen_table[i] = rgb_t(pal5bit(i >> 11), pal6bit(i >> 0), pal5bit(i >> 6));
break;
/* others */
default:
logerror("Can't handle mode %X\n", vmode);
fprintf(stderr, "Can't handle mode %X\n", vmode);
break;
}
}
/*************************************
*
* 32-bit access to the blitter
*
*************************************/
void jaguar_state::blitter_run()
{
uint32_t command = m_blitter_regs[B_CMD] & STATIC_COMMAND_MASK;
uint32_t a1flags = m_blitter_regs[A1_FLAGS] & STATIC_FLAGS_MASK;
uint32_t a2flags = m_blitter_regs[A2_FLAGS] & STATIC_FLAGS_MASK;
g_profiler.start(PROFILER_USER1);
if (a1flags == a2flags)
{
if (command == 0x09800001 && a1flags == 0x010020)
{
blitter_09800001_010020_010020(m_blitter_regs[B_CMD], m_blitter_regs[A1_FLAGS], m_blitter_regs[A2_FLAGS]);
return;
}
if (command == 0x09800009 && a1flags == 0x000020)
{
blitter_09800009_000020_000020(m_blitter_regs[B_CMD], m_blitter_regs[A1_FLAGS], m_blitter_regs[A2_FLAGS]);
return;
}
if (command == 0x01800009 && a1flags == 0x000028)
{
blitter_01800009_000028_000028(m_blitter_regs[B_CMD], m_blitter_regs[A1_FLAGS], m_blitter_regs[A2_FLAGS]);
return;
}
if (command == 0x01800001 && a1flags == 0x000018)
{
blitter_01800001_000018_000018(m_blitter_regs[B_CMD], m_blitter_regs[A1_FLAGS], m_blitter_regs[A2_FLAGS]);
return;
}
if (command == 0x01c00001 && a1flags == 0x000018)
{
blitter_01c00001_000018_000018(m_blitter_regs[B_CMD], m_blitter_regs[A1_FLAGS], m_blitter_regs[A2_FLAGS]);
return;
}
}
if (command == 0x00010000)
{
blitter_00010000_xxxxxx_xxxxxx(m_blitter_regs[B_CMD], m_blitter_regs[A1_FLAGS], m_blitter_regs[A2_FLAGS]);
return;
}
if (command == 0x01800001)
{
blitter_01800001_xxxxxx_xxxxxx(m_blitter_regs[B_CMD], m_blitter_regs[A1_FLAGS], m_blitter_regs[A2_FLAGS]);
return;
}
if ((command & 0x0ffff0ff) == 0x01800001)
{
blitter_x1800x01_xxxxxx_xxxxxx(m_blitter_regs[B_CMD], m_blitter_regs[A1_FLAGS], m_blitter_regs[A2_FLAGS]);
return;
}
if (LOG_BLITTER_STATS)
{
static uint32_t blitter_stats[1000][4];
static uint64_t blitter_pixels[1000];
static int blitter_count = 0;
static int reps = 0;
int i;
for (i = 0; i < blitter_count; i++)
if (blitter_stats[i][0] == (m_blitter_regs[B_CMD] & STATIC_COMMAND_MASK) &&
blitter_stats[i][1] == (m_blitter_regs[A1_FLAGS] & STATIC_FLAGS_MASK) &&
blitter_stats[i][2] == (m_blitter_regs[A2_FLAGS] & STATIC_FLAGS_MASK))
break;
if (i == blitter_count)
{
blitter_stats[i][0] = m_blitter_regs[B_CMD] & STATIC_COMMAND_MASK;
blitter_stats[i][1] = m_blitter_regs[A1_FLAGS] & STATIC_FLAGS_MASK;
blitter_stats[i][2] = m_blitter_regs[A2_FLAGS] & STATIC_FLAGS_MASK;
blitter_stats[i][3] = 0;
blitter_pixels[i] = 0;
blitter_count++;
}
blitter_stats[i][3]++;
blitter_pixels[i] += (m_blitter_regs[B_COUNT] & 0xffff) * (m_blitter_regs[B_COUNT] >> 16);
if (++reps % 100 == 99)
{
osd_printf_debug("---\nBlitter stats:\n");
for (i = 0; i < blitter_count; i++)
osd_printf_debug(" CMD=%08X A1=%08X A2=%08X %6d times, %016X pixels\n",
blitter_stats[i][0], blitter_stats[i][1], blitter_stats[i][2],
blitter_stats[i][3], blitter_pixels[i]);
osd_printf_debug("---\n");
}
}
generic_blitter(m_blitter_regs[B_CMD], m_blitter_regs[A1_FLAGS], m_blitter_regs[A2_FLAGS]);
g_profiler.stop();
}
READ32_MEMBER( jaguar_state::blitter_r )
{
switch (offset)
{
case B_CMD: /* B_CMD */
return m_blitter_status & 3;
default:
logerror("%s:Blitter read register @ F022%02X\n", machine().describe_context(), offset * 4);
return 0;
}
}
WRITE32_MEMBER( jaguar_state::blitter_w )
{
COMBINE_DATA(&m_blitter_regs[offset]);
if ((offset == B_CMD) && ACCESSING_BITS_0_15)
{
m_blitter_status = 0;
int inner_count = m_blitter_regs[B_COUNT] & 0xffff;
int outer_count = m_blitter_regs[B_COUNT] >> 16;
timer_set(attotime::from_ticks(inner_count * outer_count, m_gpu->clock()), TID_BLITTER_DONE);
blitter_run();
}
if (LOG_BLITTER_WRITE)
logerror("%s:Blitter write register @ F022%02X = %08X\n", machine().describe_context(), offset * 4, data);
}
/*************************************
*
* 16-bit TOM register access
*
*************************************/
READ16_MEMBER( jaguar_state::tom_regs_r )
{
if (offset != INT1 && offset != INT2 && offset != HC && offset != VC)
logerror("%s:TOM read register @ F00%03X\n", machine().describe_context(), offset * 2);
switch (offset)
{
case INT1:
return m_cpu_irq_state;
case HC:
return m_screen->hpos() % (m_screen->width() / 2);
case VC:
{
uint8_t half_line;
if(m_screen->hpos() >= (m_screen->width() / 2))
half_line = 1;
else
half_line = 0;
return m_screen->vpos() * 2 + half_line;
}
}
return m_gpu_regs[offset];
}
WRITE16_MEMBER( jaguar_state::tom_regs_w )
{
uint32_t reg_store = m_gpu_regs[offset];
attotime sample_period;
if (offset < GPU_REGS)
{
COMBINE_DATA(&m_gpu_regs[offset]);
switch (offset)
{
case MEMCON1:
if((m_gpu_regs[offset] & 1) == 0)
printf("Warning: ROMHI = 0!\n");
break;
case PIT0:
case PIT1:
if (m_gpu_regs[PIT0] && m_gpu_regs[PIT0] != 0xffff) //FIXME: avoid too much small timers for now
{
sample_period = attotime::from_ticks((1+m_gpu_regs[PIT0]) * (1+m_gpu_regs[PIT1]), m_gpu->clock()/2);
timer_set(sample_period, TID_PIT);
}
break;
case INT1:
m_cpu_irq_state &= ~(m_gpu_regs[INT1] >> 8);
update_cpu_irq();
break;
case VMODE:
if (reg_store != m_gpu_regs[offset])
set_palette(m_gpu_regs[VMODE]);
break;
case OBF: /* clear GPU interrupt */
m_cpu_irq_state &= 0xfd;
update_cpu_irq();
break;
case HP:
case HBB:
case HBE:
case HDB1:
case HDB2:
case HDE:
case VP:
case VBB:
case VBE:
case VDB:
case VDE:
{
if (reg_store != m_gpu_regs[offset])
{
int hperiod = 2 * ((m_gpu_regs[HP] & 0x3ff) + 1);
int hbend = effective_hvalue(ENABLE_BORDERS ? m_gpu_regs[HBE] : std::min(m_gpu_regs[HDB1], m_gpu_regs[HDB2]));
int hbstart = effective_hvalue(m_gpu_regs[ENABLE_BORDERS ? HBB : HDE]);
int vperiod = (m_gpu_regs[VP] & 0x7ff) + 1;
int vbend = std::max(m_gpu_regs[VBE],m_gpu_regs[VDB]) & 0x7ff;
int vbstart = m_gpu_regs[VBB] & 0x7ff;
/* adjust for the half-lines */
if (hperiod != 0 && vperiod != 0 && hbend < hbstart && vbend < vbstart && hbstart < hperiod)
{
rectangle visarea(hbend / 2, hbstart / 2 - 1, vbend / 2, vbstart / 2 - 1);
m_screen->configure(hperiod / 2, vperiod / 2, visarea, HZ_TO_ATTOSECONDS(double(m_pixel_clock) * 2 / hperiod / vperiod));
}
}
break;
}
}
}
if (offset != INT2 && offset != VI && offset != INT1)
logerror("%s:TOM write register @ F00%03X = %04X\n", machine().describe_context(), offset * 2, data);
}
/*************************************
*
* Gun input
*
*************************************/
READ32_MEMBER( jaguar_state::cojag_gun_input_r )
{
int beamx, beamy;
switch (offset)
{
case 0:
get_crosshair_xy(1, beamx, beamy);
return (beamy << 16) | (beamx ^ 0x1ff);
case 1:
get_crosshair_xy(0, beamx, beamy);
return (beamy << 16) | (beamx ^ 0x1ff);
case 2:
return ioport("IN3")->read();
}
return 0;
}
/*************************************
*
* Video system start
*
*************************************/
void jaguar_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{
switch (id)
{
case TID_SCANLINE:
scanline_update(param);
break;
case TID_BLITTER_DONE:
m_blitter_status = 1;
break;
case TID_PIT:
if (m_gpu_regs[INT1] & 0x8)
{
m_cpu_irq_state |= 8;
update_cpu_irq();
}
if (m_gpu_regs[PIT0] != 0)
{
attotime sample_period = attotime::from_ticks((1+m_gpu_regs[PIT0]) * (1+m_gpu_regs[PIT1]), m_gpu->clock()/2);
timer_set(sample_period, TID_PIT);
}
break;
case TID_SERIAL:
serial_update();
break;
case TID_GPU_SYNC:
// if a command is still pending, and we haven't maxed out our timer, set a new one
if (m_gpu_command_pending && param < 1000)
timer_set(attotime::from_usec(50), TID_GPU_SYNC, ++param);
break;
}
}
void jaguar_state::scanline_update(int param)
{
int vc = param & 0xffff;
int hdb = param >> 16;
const rectangle &visarea = m_screen->visible_area();
/* only run if video is enabled and we are past the "display begin" */
if ((m_gpu_regs[VMODE] & 1) && vc >= (m_gpu_regs[VDB] & 0x7ff))
{
uint32_t *dest = &m_screen_bitmap.pix32(vc >> 1);
int maxx = visarea.right();
int hde = effective_hvalue(m_gpu_regs[HDE]) >> 1;
uint16_t x,scanline[760];
uint8_t y,pixel_width = ((m_gpu_regs[VMODE]>>10)&3)+1;
/* if we are first on this scanline, clear to the border color */
if (ENABLE_BORDERS && vc % 2 == 0)
{
rgb_t border = rgb_t(m_gpu_regs[BORD1] & 0xff, m_gpu_regs[BORD1] >> 8, m_gpu_regs[BORD2] & 0xff);
for (x = visarea.left(); x <= visarea.right(); x++)
dest[x] = border;
}
/* process the object list for this counter value */
process_object_list(vc, scanline);
/* copy the data to the target, clipping */
if ((m_gpu_regs[VMODE] & 0x106) == 0x002) /* RGB24 */
{
for (x = 0; x < 760 && hdb <= maxx && hdb < hde; x+=2)
for (y = 0; y < pixel_width; y++)
{
uint8_t r = m_pen_table[(scanline[x]&0xff)|256];
uint8_t g = m_pen_table[(scanline[x]>>8)|512];
uint8_t b = m_pen_table[scanline[x+1]&0xff];
dest[hdb++] = rgb_t(r, g, b);
}
}
else
{
for (x = 0; x < 760 && hdb <= maxx && hdb < hde; x++)
for (y = 0; y < pixel_width; y++)
dest[hdb++] = m_pen_table[scanline[x]];
}
}
/* adjust the timer in a loop, to handle missed cases */
do
{
/* handle vertical interrupts */
if (vc == m_gpu_regs[VI])
{
m_cpu_irq_state |= 1;
update_cpu_irq();
}
/* point to the next counter value */
if (++vc / 2 >= m_screen->height())
vc = 0;
} while (!adjust_object_timer(vc));
}
void jaguar_state::video_start()
{
memset(&m_blitter_regs, 0, sizeof(m_blitter_regs));
memset(&m_gpu_regs, 0, sizeof(m_gpu_regs));
m_cpu_irq_state = 0;
m_object_timer = timer_alloc(TID_SCANLINE);
adjust_object_timer(0);
m_screen_bitmap.allocate(760, 512);
jagobj_init();
save_item(NAME(m_pen_table));
save_item(NAME(m_blitter_regs));
save_item(NAME(m_gpu_regs));
save_item(NAME(m_cpu_irq_state));
m_pixel_clock = m_is_cojag ? COJAG_PIXEL_CLOCK.value() : JAGUAR_CLOCK.value();
}
void jaguar_state::device_postload()
{
update_cpu_irq();
}
/*************************************
*
* Main refresh
*
*************************************/
uint32_t jaguar_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
/* if not enabled, just blank */
if (!(m_gpu_regs[VMODE] & 1))
{
bitmap.fill(0, cliprect);
return 0;
}
/* render the object list */
copybitmap(bitmap, m_screen_bitmap, 0, 0, 0, 0, cliprect);
return 0;
}
/*************************************
*
* Object processor
*
*************************************/
#define INCLUDE_OBJECT_PROCESSOR
#include "jagobj.hxx"
/*************************************
*
* Blitter macros
*
*************************************/
/* generic blitters */
#define FUNCNAME generic_blitter
#define COMMAND command
#define A1FIXED a1flags
#define A2FIXED a2flags
#include "jagblit.hxx"
#undef A2FIXED
#undef A1FIXED
#undef COMMAND
#undef FUNCNAME
/* optimized common blitters */
#define FUNCNAME blitter_09800001_010020_010020
#define COMMAND 0x09800001
#define A1FIXED 0x010020
#define A2FIXED 0x010020
#include "jagblit.hxx"
#undef A2FIXED
#undef A1FIXED
#undef COMMAND
#undef FUNCNAME
#define FUNCNAME blitter_09800009_000020_000020
#define COMMAND 0x09800009
#define A1FIXED 0x000020
#define A2FIXED 0x000020
#include "jagblit.hxx"
#undef A2FIXED
#undef A1FIXED
#undef COMMAND
#undef FUNCNAME
#define FUNCNAME blitter_01800009_000028_000028
#define COMMAND 0x01800009
#define A1FIXED 0x000028
#define A2FIXED 0x000028
#include "jagblit.hxx"
#undef A2FIXED
#undef A1FIXED
#undef COMMAND
#undef FUNCNAME
#define FUNCNAME blitter_01800001_000018_000018
#define COMMAND 0x01800001
#define A1FIXED 0x000018
#define A2FIXED 0x000018
#include "jagblit.hxx"
#undef A2FIXED
#undef A1FIXED
#undef COMMAND
#undef FUNCNAME
#define FUNCNAME blitter_01c00001_000018_000018
#define COMMAND 0x01c00001
#define A1FIXED 0x000018
#define A2FIXED 0x000018
#include "jagblit.hxx"
#undef A2FIXED
#undef A1FIXED
#undef COMMAND
#undef FUNCNAME
#define FUNCNAME blitter_00010000_xxxxxx_xxxxxx
#define COMMAND 0x00010000
#define A1FIXED a1flags
#define A2FIXED a2flags
#include "jagblit.hxx"
#undef A2FIXED
#undef A1FIXED
#undef COMMAND
#undef FUNCNAME
#define FUNCNAME blitter_01800001_xxxxxx_xxxxxx
#define COMMAND 0x01800001
#define A1FIXED a1flags
#define A2FIXED a2flags
#include "jagblit.hxx"
#undef A2FIXED
#undef A1FIXED
#undef COMMAND
#undef FUNCNAME
#define FUNCNAME blitter_x1800x01_xxxxxx_xxxxxx
#define COMMAND ((command & 0xf0000f00) | 0x01800001)
#define A1FIXED a1flags
#define A2FIXED a2flags
#include "jagblit.hxx"
#undef A2FIXED
#undef A1FIXED
#undef COMMAND
#undef FUNCNAME