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-rw-r--r--src/mame/video/light.cpp381
1 files changed, 381 insertions, 0 deletions
diff --git a/src/mame/video/light.cpp b/src/mame/video/light.cpp
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+++ b/src/mame/video/light.cpp
@@ -0,0 +1,381 @@
+// license:BSD-3-Clause
+// copyright-holders:Ryan Holtz, Tyson Smith
+/*
+ Silicon Graphics LG1 "Light" graphics board used as
+ entry level graphics in the Indigo and IRIS Crimson.
+*/
+
+#include "emu.h"
+#include "video/light.h"
+#include "screen.h"
+
+#define LOG_REX (1 << 0)
+#define LOG_ALL (LOG_REX)
+
+#define VERBOSE (0)
+#include "logmacro.h"
+
+enum
+{
+ REX15_PAGE0_SET = 0x00000000,
+ REX15_PAGE0_GO = 0x00000800,
+ REX15_PAGE1_SET = 0x00004790,
+ REX15_PAGE1_GO = 0x00004f90,
+
+ REX15_P0REG_COMMAND = 0x00000000,
+ REX15_P0REG_XSTARTI = 0x0000000c,
+ REX15_P0REG_YSTARTI = 0x0000001c,
+ REX15_P0REG_XYMOVE = 0x00000034,
+ REX15_P0REG_COLORREDI = 0x00000038,
+ REX15_P0REG_COLORGREENI = 0x00000040,
+ REX15_P0REG_COLORBLUEI = 0x00000048,
+ REX15_P0REG_COLORBACK = 0x0000005c,
+ REX15_P0REG_ZPATTERN = 0x00000060,
+ REX15_P0REG_XENDI = 0x00000084,
+ REX15_P0REG_YENDI = 0x00000088,
+
+ REX15_P1REG_WCLOCKREV = 0x00000054,
+ REX15_P1REG_CFGDATA = 0x00000058,
+ REX15_P1REG_CFGSEL = 0x0000005c,
+ REX15_P1REG_VC1_ADDRDATA = 0x00000060,
+ REX15_P1REG_CFGMODE = 0x00000068,
+ REX15_P1REG_XYOFFSET = 0x0000006c,
+
+ REX15_OP_NOP = 0x00000000,
+ REX15_OP_DRAW = 0x00000001,
+
+ REX15_OP_FLAG_BLOCK = 0x00000008,
+ REX15_OP_FLAG_LENGTH32 = 0x00000010,
+ REX15_OP_FLAG_QUADMODE = 0x00000020,
+ REX15_OP_FLAG_XYCONTINUE = 0x00000080,
+ REX15_OP_FLAG_STOPONX = 0x00000100,
+ REX15_OP_FLAG_STOPONY = 0x00000200,
+ REX15_OP_FLAG_ENZPATTERN = 0x00000400,
+ REX15_OP_FLAG_LOGICSRC = 0x00080000,
+ REX15_OP_FLAG_ZOPAQUE = 0x00800000,
+ REX15_OP_FLAG_ZCONTINUE = 0x01000000,
+
+ REX15_WRITE_ADDR = 0x00,
+ REX15_PALETTE_RAM = 0x01,
+ REX15_PIXEL_READ_MASK = 0x02,
+ REX15_CONTROL = 0x06
+};
+
+DEFINE_DEVICE_TYPE(LIGHT_VIDEO, light_video_device, "light_video", "SGI Light graphics board")
+
+
+light_video_device::light_video_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, LIGHT_VIDEO, tag, owner, clock)
+ , m_palette(*this, "palette")
+{
+}
+
+
+//-------------------------------------------------
+// device_add_mconfig - device-specific machine configuration
+//-------------------------------------------------
+
+void light_video_device::device_add_mconfig(machine_config &config)
+{
+ screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
+ screen.set_refresh_hz(60);
+ screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
+ screen.set_size(x_res, y_res);
+ screen.set_visarea(0, x_res-1, 0, y_res-1);
+ screen.set_screen_update(FUNC(light_video_device::screen_update));
+
+ PALETTE(config, m_palette).set_entries(256);
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void light_video_device::device_start()
+{
+ m_framebuffer = std::make_unique<uint8_t[]>(x_res*y_res);
+
+ save_item(NAME(m_lg1.m_config_sel));
+ save_item(NAME(m_lg1.m_write_addr));
+ save_item(NAME(m_lg1.m_control));
+ save_item(NAME(m_lg1.m_command));
+ save_item(NAME(m_lg1.m_x_start_i));
+ save_item(NAME(m_lg1.m_y_start_i));
+ save_item(NAME(m_lg1.m_xy_move));
+ save_item(NAME(m_lg1.m_color_red_i));
+ save_item(NAME(m_lg1.m_color_green_i));
+ save_item(NAME(m_lg1.m_color_blue_i));
+ save_item(NAME(m_lg1.m_color_back));
+ save_item(NAME(m_lg1.m_z_pattern));
+ save_item(NAME(m_lg1.m_x_end_i));
+ save_item(NAME(m_lg1.m_y_end_i));
+ save_item(NAME(m_lg1.m_x_curr_i));
+ save_item(NAME(m_lg1.m_y_curr_i));
+ save_item(NAME(m_lg1.m_palette_idx));
+ save_item(NAME(m_lg1.m_palette_channel));
+ save_item(NAME(m_lg1.m_palette_entry));
+ save_item(NAME(m_lg1.m_pix_read_mask));
+
+ save_pointer(NAME(&m_framebuffer[0]), x_res*y_res);
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void light_video_device::device_reset()
+{
+ memset(&m_lg1, 0, sizeof(lg1_t));
+ memset(&m_framebuffer[0], 0, x_res*y_res);
+}
+
+uint32_t light_video_device::screen_update(screen_device &device, bitmap_rgb32 &bitmap, const rectangle &cliprect)
+{
+ const rgb_t *pens = m_palette->palette()->entry_list_raw();
+ const uint8_t *src = &m_framebuffer[0];
+ for (uint32_t y = 0; y < y_res; y++) {
+ uint32_t *dst = &bitmap.pix32(y);
+ for (uint32_t x = 0; x < x_res; x++) {
+ *dst++ = pens[*src++];
+ }
+ }
+ return 0;
+}
+
+READ32_MEMBER(light_video_device::entry_r)
+{
+ uint32_t ret = 0;
+ switch (offset)
+ {
+ case REX15_PAGE0_GO/4:
+ LOGMASKED(LOG_REX, "%s: LG1 Read: Status(?) (Go) %08x = %08x & %08x\n", machine().describe_context(), 0x1f3f0000 + offset*4, ret, mem_mask);
+ do_rex_command();
+ break;
+ case 0x0014/4:
+ ret = 0x033c0000;
+ LOGMASKED(LOG_REX, "%s: LG1 Read: Presence Detect(?) %08x = %08x & %08x\n", machine().describe_context(), 0x1f3f0000 + offset*4, ret, mem_mask);
+ break;
+ default:
+ LOGMASKED(LOG_REX, "%s: Unknown LG1 Read: %08x = %08x & %08x\n", machine().describe_context(), 0x1f3f0000 + offset*4, ret, mem_mask);
+ break;
+ }
+ return ret;
+}
+
+WRITE32_MEMBER(light_video_device::entry_w)
+{
+ bool go = (offset >= REX15_PAGE1_GO/4) || (offset >= REX15_PAGE0_GO/4 && offset < REX15_PAGE1_SET/4);
+
+ switch (offset)
+ {
+ case (REX15_PAGE0_SET+REX15_P0REG_COMMAND)/4:
+ case (REX15_PAGE0_GO+REX15_P0REG_COMMAND)/4:
+ m_lg1.m_command = data;
+ LOGMASKED(LOG_REX, "%s: LG1 REX1.5 Command Write (%s) = %08x\n", machine().describe_context(), (offset & 0x200) ? "Go" : "Set", data);
+ if (go)
+ do_rex_command();
+ break;
+ case (REX15_PAGE0_SET+REX15_P0REG_XSTARTI)/4:
+ case (REX15_PAGE0_GO+REX15_P0REG_XSTARTI)/4:
+ m_lg1.m_x_start_i = data;
+ m_lg1.m_x_curr_i = m_lg1.m_x_start_i;
+ LOGMASKED(LOG_REX, "%s: LG1 REX1.5 XStartI Write (%s) = %08x\n", machine().describe_context(), (offset & 0x200) ? "Go" : "Set", data);
+ break;
+ case (REX15_PAGE0_SET+REX15_P0REG_YSTARTI)/4:
+ case (REX15_PAGE0_GO+REX15_P0REG_YSTARTI)/4:
+ m_lg1.m_y_start_i = data;
+ m_lg1.m_y_curr_i = m_lg1.m_y_start_i;
+ LOGMASKED(LOG_REX, "%s: LG1 REX1.5 YStartI Write (%s) = %08x\n", machine().describe_context(), (offset & 0x200) ? "Go" : "Set", data);
+ break;
+ case (REX15_PAGE0_SET+REX15_P0REG_XYMOVE)/4:
+ case (REX15_PAGE0_GO+REX15_P0REG_XYMOVE)/4:
+ m_lg1.m_xy_move = data;
+ LOGMASKED(LOG_REX, "%s: LG1 REX1.5 XYMove Write (%s) = %08x\n", machine().describe_context(), (offset & 0x200) ? "Go" : "Set", data);
+ if (go)
+ do_rex_command();
+ break;
+ case (REX15_PAGE0_SET+REX15_P0REG_COLORREDI)/4:
+ case (REX15_PAGE0_GO+REX15_P0REG_COLORREDI)/4:
+ m_lg1.m_color_red_i = data;
+ LOGMASKED(LOG_REX, "%s: LG1 REX1.5 ColorRedI Write (%s) = %08x\n", machine().describe_context(), (offset & 0x200) ? "Go" : "Set", data);
+ break;
+ case (REX15_PAGE0_SET+REX15_P0REG_COLORGREENI)/4:
+ case (REX15_PAGE0_GO+REX15_P0REG_COLORGREENI)/4:
+ m_lg1.m_color_green_i = data;
+ LOGMASKED(LOG_REX, "%s: LG1 REX1.5 ColorGreenI Write (%s) = %08x\n", machine().describe_context(), (offset & 0x200) ? "Go" : "Set", data);
+ break;
+ case (REX15_PAGE0_SET+REX15_P0REG_COLORBLUEI)/4:
+ case (REX15_PAGE0_GO+REX15_P0REG_COLORBLUEI)/4:
+ m_lg1.m_color_blue_i = data;
+ LOGMASKED(LOG_REX, "%s: LG1 REX1.5 ColorBlueI Write (%s) = %08x\n", machine().describe_context(), (offset & 0x200) ? "Go" : "Set", data);
+ break;
+ case (REX15_PAGE0_SET+REX15_P0REG_COLORBACK)/4:
+ case (REX15_PAGE0_GO+REX15_P0REG_COLORBACK)/4:
+ m_lg1.m_color_back = data;
+ LOGMASKED(LOG_REX, "%s: LG1 REX1.5 ColorBlueI Write (%s) = %08x\n", machine().describe_context(), (offset & 0x200) ? "Go" : "Set", data);
+ break;
+ case (REX15_PAGE0_SET+REX15_P0REG_ZPATTERN)/4:
+ case (REX15_PAGE0_GO+REX15_P0REG_ZPATTERN)/4:
+ m_lg1.m_z_pattern = data;
+ LOGMASKED(LOG_REX, "%s: LG1 REX1.5 ZPattern Write (%s) = %08x\n", machine().describe_context(), (offset & 0x200) ? "Go" : "Set", data);
+ if (go)
+ do_rex_command();
+ break;
+ case (REX15_PAGE0_SET+REX15_P0REG_XENDI)/4:
+ case (REX15_PAGE0_GO+REX15_P0REG_XENDI)/4:
+ m_lg1.m_x_end_i = data;
+ LOGMASKED(LOG_REX, "%s: LG1 REX1.5 XEndI Write (%s) = %08x\n", machine().describe_context(), (offset & 0x200) ? "Go" : "Set", data);
+ break;
+ case (REX15_PAGE0_SET+REX15_P0REG_YENDI)/4:
+ case (REX15_PAGE0_GO+REX15_P0REG_YENDI)/4:
+ m_lg1.m_y_end_i = data;
+ LOGMASKED(LOG_REX, "%s: LG1 REX1.5 YEndI Write (%s) = %08x\n", machine().describe_context(), (offset & 0x200) ? "Go" : "Set", data);
+ break;
+
+ case (REX15_PAGE1_SET+REX15_P1REG_CFGSEL)/4:
+ case (REX15_PAGE1_GO+REX15_P1REG_CFGSEL)/4:
+ m_lg1.m_config_sel = data;
+ switch (data)
+ {
+ case REX15_WRITE_ADDR:
+ LOGMASKED(LOG_REX, "%s: LG1 ConfigSel Write = %08x (Write Addr)\n", machine().describe_context(), data);
+ break;
+ case REX15_PALETTE_RAM:
+ LOGMASKED(LOG_REX, "%s: LG1 ConfigSel Write = %08x (Palette RAM)\n", machine().describe_context(), data);
+ break;
+ case REX15_CONTROL:
+ LOGMASKED(LOG_REX, "%s: LG1 ConfigSel Write = %08x (Control)\n", machine().describe_context(), data);
+ break;
+ case REX15_PIXEL_READ_MASK:
+ LOGMASKED(LOG_REX, "%s: LG1 ConfigSel Write = %08x (Pixel Read Mask)\n", machine().describe_context(), data);
+ break;
+ default:
+ LOGMASKED(LOG_REX, "%s: LG1 ConfigSel Write = %08x (Unknown)\n", machine().describe_context(), data);
+ break;
+ }
+ break;
+ case (REX15_PAGE1_SET+REX15_P1REG_CFGDATA)/4:
+ case (REX15_PAGE1_GO+REX15_P1REG_CFGDATA)/4:
+ if (go) // Ignore 'Go' writes for now, unsure what they do
+ break;
+ switch (m_lg1.m_config_sel)
+ {
+ case REX15_WRITE_ADDR:
+ LOGMASKED(LOG_REX, "%s: LG1 ConfigSel Write: Setting WriteAddr to %08x\n", machine().describe_context(), data);
+ m_lg1.m_write_addr = data;
+ if (m_lg1.m_control == 0xf)
+ {
+ LOGMASKED(LOG_REX, "%s: LG1 about to set palette entry %02x\n", machine().describe_context(), (uint8_t)data);
+ m_lg1.m_palette_idx = (uint8_t)data;
+ m_lg1.m_palette_channel = 0;
+ }
+ break;
+ case REX15_PALETTE_RAM:
+ LOGMASKED(LOG_REX, "%s: LG1 ConfigSel Write: Setting Palette RAM %02x entry %d to %02x\n", machine().describe_context(),
+ m_lg1.m_palette_idx, m_lg1.m_palette_channel, (uint8_t)data);
+ m_lg1.m_palette_entry[m_lg1.m_palette_channel++] = (uint8_t)data;
+ if (m_lg1.m_palette_channel == 3)
+ {
+ m_palette->set_pen_color(m_lg1.m_palette_idx, m_lg1.m_palette_entry[0], m_lg1.m_palette_entry[1], m_lg1.m_palette_entry[2]);
+ }
+ break;
+ case REX15_CONTROL:
+ LOGMASKED(LOG_REX, "%s: LG1 ConfigSel Write: Setting Control to %08x\n", machine().describe_context(), data);
+ m_lg1.m_control = data;
+ break;
+ case REX15_PIXEL_READ_MASK:
+ LOGMASKED(LOG_REX, "%s: LG1 ConfigSel Write = %08x (Pixel Read Mask, entry %02x)\n", machine().describe_context(), data, m_lg1.m_palette_idx);
+ m_lg1.m_pix_read_mask[m_lg1.m_palette_idx] = (uint8_t)data;
+ break;
+ default:
+ LOGMASKED(LOG_REX, "%s: LG1 Unknown ConfigData Write = %08x\n", machine().describe_context(), data);
+ break;
+ }
+ break;
+ default:
+ LOGMASKED(LOG_REX, "%s: Unknown LG1 Write: %08x = %08x & %08x\n", machine().describe_context(), 0x1f3f0000 + offset*4, data, mem_mask);
+ break;
+ }
+}
+
+void light_video_device::do_rex_command()
+{
+ if (m_lg1.m_command == 0)
+ {
+ return;
+ }
+ if (m_lg1.m_command == 0x30080329)
+ {
+ bool xycontinue = (m_lg1.m_command & REX15_OP_FLAG_XYCONTINUE);
+ bool copy = (m_lg1.m_command & REX15_OP_FLAG_LOGICSRC);
+ const uint32_t start_x = xycontinue ? m_lg1.m_x_curr_i : m_lg1.m_x_start_i;
+ const uint32_t start_y = xycontinue ? m_lg1.m_y_curr_i : m_lg1.m_y_start_i;
+ const uint32_t end_x = m_lg1.m_x_end_i;
+ const uint32_t end_y = m_lg1.m_y_end_i;
+ const uint32_t src_start_x = start_x + (m_lg1.m_xy_move >> 16);
+ const uint32_t src_start_y = start_y + (uint16_t)m_lg1.m_xy_move;;
+
+ LOGMASKED(LOG_REX, "LG1: Command %08x: Block copy from %d,%d-%d,%d inclusive.\n", m_lg1.m_command, start_x, start_y, end_x, end_y);
+ if (copy)
+ {
+ for (uint32_t y = start_y, src_y = src_start_y; y <= end_y; y++, src_y++)
+ for (uint32_t x = start_x, src_x = src_start_x; x <= end_x; x++, src_x++)
+ m_framebuffer[y*x_res + x] = m_framebuffer[src_y*x_res + src_x];
+ }
+ else
+ {
+ for (uint32_t y = start_y; y <= end_y; y++)
+ for (uint32_t x = start_x; x <= end_x; x++)
+ m_framebuffer[y*x_res + x] = m_lg1.m_color_red_i;
+ }
+ }
+ else if (m_lg1.m_command == 0x30000329)
+ {
+ bool xycontinue = (m_lg1.m_command & REX15_OP_FLAG_XYCONTINUE);
+ uint32_t start_x = xycontinue ? m_lg1.m_x_curr_i : m_lg1.m_x_start_i;
+ uint32_t start_y = xycontinue ? m_lg1.m_y_curr_i : m_lg1.m_y_start_i;
+ uint32_t end_x = m_lg1.m_x_end_i;
+ uint32_t end_y = m_lg1.m_y_end_i;
+
+ LOGMASKED(LOG_REX, "LG1: Command %08x: Block draw from %d,%d-%d,%d inclusive.\n", m_lg1.m_command, start_x, start_y, end_x, end_y);
+ for (uint32_t y = start_y; y <= end_y; y++)
+ {
+ for (uint32_t x = start_x; x <= end_x; x++)
+ {
+ m_framebuffer[y*x_res + x] = m_lg1.m_color_red_i;
+ }
+ }
+ }
+ else if (m_lg1.m_command == 0x300005a1 ||
+ m_lg1.m_command == 0x300005a9 ||
+ m_lg1.m_command == 0x300005b9)
+ {
+ bool xycontinue = (m_lg1.m_command & REX15_OP_FLAG_XYCONTINUE);
+ uint32_t start_x = xycontinue ? m_lg1.m_x_curr_i : m_lg1.m_x_start_i;
+ uint32_t start_y = xycontinue ? m_lg1.m_y_curr_i : m_lg1.m_y_start_i;
+ uint32_t end_x = m_lg1.m_x_end_i;
+ LOGMASKED(LOG_REX, "LG1: Command %08x: Pattern draw from %d-%d at %d\n", m_lg1.m_command, start_x, end_x, start_y);
+ for (uint32_t x = start_x; x <= end_x && x < (start_x + 32); x++)
+ {
+ if (BIT(m_lg1.m_z_pattern, 31 - (x - start_x)))
+ {
+ m_framebuffer[start_y*x_res + x] = m_lg1.m_color_red_i;
+ }
+ m_lg1.m_x_curr_i++;
+ }
+
+ if (m_lg1.m_command & REX15_OP_FLAG_BLOCK)
+ {
+ if (m_lg1.m_x_curr_i > m_lg1.m_x_end_i)
+ {
+ m_lg1.m_y_curr_i--;
+ m_lg1.m_x_curr_i = m_lg1.m_x_start_i;
+ }
+ }
+ }
+ else
+ {
+ LOGMASKED(LOG_REX, "%s: Unknown LG1 command: %08x\n", machine().describe_context(), m_lg1.m_command);
+ }
+}