]> Git Repo - qemu.git/blobdiff - hw/tcx.c
PPC: E500: Remove unneeded CPU nodes
[qemu.git] / hw / tcx.c
index ed32c94242889cd692e8dd3918db3796871e3f61..309600d24c1fa5b19072d290783a9b833b593ac2 100644 (file)
--- a/hw/tcx.c
+++ b/hw/tcx.c
@@ -1,8 +1,8 @@
 /*
  * QEMU TCX Frame buffer
- * 
+ *
  * Copyright (c) 2003-2005 Fabrice Bellard
- * 
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
-#include "vl.h"
+
+#include "console.h"
+#include "pixel_ops.h"
+#include "sysbus.h"
+#include "qdev-addr.h"
 
 #define MAXX 1024
 #define MAXY 768
 #define TCX_DAC_NREGS 16
+#define TCX_THC_NREGS_8  0x081c
+#define TCX_THC_NREGS_24 0x1000
+#define TCX_TEC_NREGS    0x1000
 
 typedef struct TCXState {
-    uint32_t addr;
+    SysBusDevice busdev;
+    target_phys_addr_t addr;
     DisplayState *ds;
     uint8_t *vram;
-    ram_addr_t vram_offset;
-    uint16_t width, height;
+    uint32_t *vram24, *cplane;
+    ram_addr_t vram_offset, vram24_offset, cplane_offset;
+    uint32_t vram_size;
+    uint32_t palette[256];
     uint8_t r[256], g[256], b[256];
+    uint16_t width, height, depth;
     uint8_t dac_index, dac_state;
 } TCXState;
 
 static void tcx_screen_dump(void *opaque, const char *filename);
+static void tcx24_screen_dump(void *opaque, const char *filename);
+
+static void tcx_set_dirty(TCXState *s)
+{
+    unsigned int i;
+
+    for (i = 0; i < MAXX * MAXY; i += TARGET_PAGE_SIZE) {
+        cpu_physical_memory_set_dirty(s->vram_offset + i);
+    }
+}
 
-static void tcx_draw_line32(TCXState *s1, uint8_t *d, 
-                           const uint8_t *s, int width)
+static void tcx24_set_dirty(TCXState *s)
+{
+    unsigned int i;
+
+    for (i = 0; i < MAXX * MAXY * 4; i += TARGET_PAGE_SIZE) {
+        cpu_physical_memory_set_dirty(s->vram24_offset + i);
+        cpu_physical_memory_set_dirty(s->cplane_offset + i);
+    }
+}
+
+static void update_palette_entries(TCXState *s, int start, int end)
+{
+    int i;
+    for(i = start; i < end; i++) {
+        switch(ds_get_bits_per_pixel(s->ds)) {
+        default:
+        case 8:
+            s->palette[i] = rgb_to_pixel8(s->r[i], s->g[i], s->b[i]);
+            break;
+        case 15:
+            s->palette[i] = rgb_to_pixel15(s->r[i], s->g[i], s->b[i]);
+            break;
+        case 16:
+            s->palette[i] = rgb_to_pixel16(s->r[i], s->g[i], s->b[i]);
+            break;
+        case 32:
+            if (is_surface_bgr(s->ds->surface))
+                s->palette[i] = rgb_to_pixel32bgr(s->r[i], s->g[i], s->b[i]);
+            else
+                s->palette[i] = rgb_to_pixel32(s->r[i], s->g[i], s->b[i]);
+            break;
+        }
+    }
+    if (s->depth == 24) {
+        tcx24_set_dirty(s);
+    } else {
+        tcx_set_dirty(s);
+    }
+}
+
+static void tcx_draw_line32(TCXState *s1, uint8_t *d,
+                            const uint8_t *s, int width)
 {
     int x;
     uint8_t val;
+    uint32_t *p = (uint32_t *)d;
 
     for(x = 0; x < width; x++) {
-       val = *s++;
-       *d++ = s1->b[val];
-       *d++ = s1->g[val];
-       *d++ = s1->r[val];
-       d++;
+        val = *s++;
+        *p++ = s1->palette[val];
     }
 }
 
-static void tcx_draw_line24(TCXState *s1, uint8_t *d, 
-                           const uint8_t *s, int width)
+static void tcx_draw_line16(TCXState *s1, uint8_t *d,
+                            const uint8_t *s, int width)
 {
     int x;
     uint8_t val;
+    uint16_t *p = (uint16_t *)d;
 
     for(x = 0; x < width; x++) {
-       val = *s++;
-       *d++ = s1->b[val];
-       *d++ = s1->g[val];
-       *d++ = s1->r[val];
+        val = *s++;
+        *p++ = s1->palette[val];
     }
 }
 
-static void tcx_draw_line8(TCXState *s1, uint8_t *d, 
-                          const uint8_t *s, int width)
+static void tcx_draw_line8(TCXState *s1, uint8_t *d,
+                           const uint8_t *s, int width)
 {
     int x;
     uint8_t val;
 
     for(x = 0; x < width; x++) {
-       val = *s++;
-       /* XXX translate between palettes? */
-       *d++ = val;
+        val = *s++;
+        *d++ = s1->palette[val];
+    }
+}
+
+/*
+  XXX Could be much more optimal:
+  * detect if line/page/whole screen is in 24 bit mode
+  * if destination is also BGR, use memcpy
+  */
+static inline void tcx24_draw_line32(TCXState *s1, uint8_t *d,
+                                     const uint8_t *s, int width,
+                                     const uint32_t *cplane,
+                                     const uint32_t *s24)
+{
+    int x, bgr, r, g, b;
+    uint8_t val, *p8;
+    uint32_t *p = (uint32_t *)d;
+    uint32_t dval;
+
+    bgr = is_surface_bgr(s1->ds->surface);
+    for(x = 0; x < width; x++, s++, s24++) {
+        if ((be32_to_cpu(*cplane++) & 0xff000000) == 0x03000000) {
+            // 24-bit direct, BGR order
+            p8 = (uint8_t *)s24;
+            p8++;
+            b = *p8++;
+            g = *p8++;
+            r = *p8;
+            if (bgr)
+                dval = rgb_to_pixel32bgr(r, g, b);
+            else
+                dval = rgb_to_pixel32(r, g, b);
+        } else {
+            val = *s;
+            dval = s1->palette[val];
+        }
+        *p++ = dval;
+    }
+}
+
+static inline int check_dirty(ram_addr_t page, ram_addr_t page24,
+                              ram_addr_t cpage)
+{
+    int ret;
+    unsigned int off;
+
+    ret = cpu_physical_memory_get_dirty(page, VGA_DIRTY_FLAG);
+    for (off = 0; off < TARGET_PAGE_SIZE * 4; off += TARGET_PAGE_SIZE) {
+        ret |= cpu_physical_memory_get_dirty(page24 + off, VGA_DIRTY_FLAG);
+        ret |= cpu_physical_memory_get_dirty(cpage + off, VGA_DIRTY_FLAG);
     }
+    return ret;
+}
+
+static inline void reset_dirty(TCXState *ts, ram_addr_t page_min,
+                               ram_addr_t page_max, ram_addr_t page24,
+                              ram_addr_t cpage)
+{
+    cpu_physical_memory_reset_dirty(page_min, page_max + TARGET_PAGE_SIZE,
+                                    VGA_DIRTY_FLAG);
+    page_min -= ts->vram_offset;
+    page_max -= ts->vram_offset;
+    cpu_physical_memory_reset_dirty(page24 + page_min * 4,
+                                    page24 + page_max * 4 + TARGET_PAGE_SIZE,
+                                    VGA_DIRTY_FLAG);
+    cpu_physical_memory_reset_dirty(cpage + page_min * 4,
+                                    cpage + page_max * 4 + TARGET_PAGE_SIZE,
+                                    VGA_DIRTY_FLAG);
 }
 
 /* Fixed line length 1024 allows us to do nice tricks not possible on
@@ -89,133 +212,217 @@ static void tcx_update_display(void *opaque)
     ram_addr_t page, page_min, page_max;
     int y, y_start, dd, ds;
     uint8_t *d, *s;
-    void (*f)(TCXState *s1, uint8_t *d, const uint8_t *s, int width);
+    void (*f)(TCXState *s1, uint8_t *dst, const uint8_t *src, int width);
 
-    if (ts->ds->depth == 0)
-       return;
+    if (ds_get_bits_per_pixel(ts->ds) == 0)
+        return;
     page = ts->vram_offset;
     y_start = -1;
-    page_min = 0xffffffff;
+    page_min = -1;
     page_max = 0;
-    d = ts->ds->data;
+    d = ds_get_data(ts->ds);
     s = ts->vram;
-    dd = ts->ds->linesize;
+    dd = ds_get_linesize(ts->ds);
     ds = 1024;
 
-    switch (ts->ds->depth) {
+    switch (ds_get_bits_per_pixel(ts->ds)) {
     case 32:
-       f = tcx_draw_line32;
-       break;
-    case 24:
-       f = tcx_draw_line24;
-       break;
+        f = tcx_draw_line32;
+        break;
+    case 15:
+    case 16:
+        f = tcx_draw_line16;
+        break;
     default:
     case 8:
-       f = tcx_draw_line8;
-       break;
+        f = tcx_draw_line8;
+        break;
     case 0:
-       return;
+        return;
     }
-    
+
     for(y = 0; y < ts->height; y += 4, page += TARGET_PAGE_SIZE) {
-       if (cpu_physical_memory_get_dirty(page, VGA_DIRTY_FLAG)) {
-           if (y_start < 0)
+        if (cpu_physical_memory_get_dirty(page, VGA_DIRTY_FLAG)) {
+            if (y_start < 0)
                 y_start = y;
             if (page < page_min)
                 page_min = page;
             if (page > page_max)
                 page_max = page;
-           f(ts, d, s, ts->width);
-           d += dd;
-           s += ds;
-           f(ts, d, s, ts->width);
-           d += dd;
-           s += ds;
-           f(ts, d, s, ts->width);
-           d += dd;
-           s += ds;
-           f(ts, d, s, ts->width);
-           d += dd;
-           s += ds;
-       } else {
+            f(ts, d, s, ts->width);
+            d += dd;
+            s += ds;
+            f(ts, d, s, ts->width);
+            d += dd;
+            s += ds;
+            f(ts, d, s, ts->width);
+            d += dd;
+            s += ds;
+            f(ts, d, s, ts->width);
+            d += dd;
+            s += ds;
+        } else {
             if (y_start >= 0) {
                 /* flush to display */
-                dpy_update(ts->ds, 0, y_start, 
+                dpy_update(ts->ds, 0, y_start,
                            ts->width, y - y_start);
                 y_start = -1;
             }
-           d += dd * 4;
-           s += ds * 4;
-       }
+            d += dd * 4;
+            s += ds * 4;
+        }
     }
     if (y_start >= 0) {
-       /* flush to display */
-       dpy_update(ts->ds, 0, y_start, 
-                  ts->width, y - y_start);
+        /* flush to display */
+        dpy_update(ts->ds, 0, y_start,
+                   ts->width, y - y_start);
     }
     /* reset modified pages */
-    if (page_min <= page_max) {
+    if (page_max >= page_min) {
         cpu_physical_memory_reset_dirty(page_min, page_max + TARGET_PAGE_SIZE,
                                         VGA_DIRTY_FLAG);
     }
 }
 
+static void tcx24_update_display(void *opaque)
+{
+    TCXState *ts = opaque;
+    ram_addr_t page, page_min, page_max, cpage, page24;
+    int y, y_start, dd, ds;
+    uint8_t *d, *s;
+    uint32_t *cptr, *s24;
+
+    if (ds_get_bits_per_pixel(ts->ds) != 32)
+            return;
+    page = ts->vram_offset;
+    page24 = ts->vram24_offset;
+    cpage = ts->cplane_offset;
+    y_start = -1;
+    page_min = -1;
+    page_max = 0;
+    d = ds_get_data(ts->ds);
+    s = ts->vram;
+    s24 = ts->vram24;
+    cptr = ts->cplane;
+    dd = ds_get_linesize(ts->ds);
+    ds = 1024;
+
+    for(y = 0; y < ts->height; y += 4, page += TARGET_PAGE_SIZE,
+            page24 += TARGET_PAGE_SIZE, cpage += TARGET_PAGE_SIZE) {
+        if (check_dirty(page, page24, cpage)) {
+            if (y_start < 0)
+                y_start = y;
+            if (page < page_min)
+                page_min = page;
+            if (page > page_max)
+                page_max = page;
+            tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
+            d += dd;
+            s += ds;
+            cptr += ds;
+            s24 += ds;
+            tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
+            d += dd;
+            s += ds;
+            cptr += ds;
+            s24 += ds;
+            tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
+            d += dd;
+            s += ds;
+            cptr += ds;
+            s24 += ds;
+            tcx24_draw_line32(ts, d, s, ts->width, cptr, s24);
+            d += dd;
+            s += ds;
+            cptr += ds;
+            s24 += ds;
+        } else {
+            if (y_start >= 0) {
+                /* flush to display */
+                dpy_update(ts->ds, 0, y_start,
+                           ts->width, y - y_start);
+                y_start = -1;
+            }
+            d += dd * 4;
+            s += ds * 4;
+            cptr += ds * 4;
+            s24 += ds * 4;
+        }
+    }
+    if (y_start >= 0) {
+        /* flush to display */
+        dpy_update(ts->ds, 0, y_start,
+                   ts->width, y - y_start);
+    }
+    /* reset modified pages */
+    if (page_max >= page_min) {
+        reset_dirty(ts, page_min, page_max, page24, cpage);
+    }
+}
+
 static void tcx_invalidate_display(void *opaque)
 {
     TCXState *s = opaque;
-    int i;
 
-    for (i = 0; i < MAXX*MAXY; i += TARGET_PAGE_SIZE) {
-       cpu_physical_memory_set_dirty(s->vram_offset + i);
-    }
+    tcx_set_dirty(s);
+    qemu_console_resize(s->ds, s->width, s->height);
 }
 
-static void tcx_save(QEMUFile *f, void *opaque)
+static void tcx24_invalidate_display(void *opaque)
 {
     TCXState *s = opaque;
-    
-    qemu_put_be32s(f, (uint32_t *)&s->addr);
-    qemu_put_be32s(f, (uint32_t *)&s->vram);
-    qemu_put_be16s(f, (uint16_t *)&s->height);
-    qemu_put_be16s(f, (uint16_t *)&s->width);
-    qemu_put_buffer(f, s->r, 256);
-    qemu_put_buffer(f, s->g, 256);
-    qemu_put_buffer(f, s->b, 256);
-    qemu_put_8s(f, &s->dac_index);
-    qemu_put_8s(f, &s->dac_state);
+
+    tcx_set_dirty(s);
+    tcx24_set_dirty(s);
+    qemu_console_resize(s->ds, s->width, s->height);
 }
 
-static int tcx_load(QEMUFile *f, void *opaque, int version_id)
+static int vmstate_tcx_post_load(void *opaque, int version_id)
 {
     TCXState *s = opaque;
-    
-    if (version_id != 1)
-        return -EINVAL;
-
-    qemu_get_be32s(f, (uint32_t *)&s->addr);
-    qemu_get_be32s(f, (uint32_t *)&s->vram);
-    qemu_get_be16s(f, (uint16_t *)&s->height);
-    qemu_get_be16s(f, (uint16_t *)&s->width);
-    qemu_get_buffer(f, s->r, 256);
-    qemu_get_buffer(f, s->g, 256);
-    qemu_get_buffer(f, s->b, 256);
-    qemu_get_8s(f, &s->dac_index);
-    qemu_get_8s(f, &s->dac_state);
+
+    update_palette_entries(s, 0, 256);
+    if (s->depth == 24) {
+        tcx24_set_dirty(s);
+    } else {
+        tcx_set_dirty(s);
+    }
+
     return 0;
 }
 
-static void tcx_reset(void *opaque)
+static const VMStateDescription vmstate_tcx = {
+    .name ="tcx",
+    .version_id = 4,
+    .minimum_version_id = 4,
+    .minimum_version_id_old = 4,
+    .post_load = vmstate_tcx_post_load,
+    .fields      = (VMStateField []) {
+        VMSTATE_UINT16(height, TCXState),
+        VMSTATE_UINT16(width, TCXState),
+        VMSTATE_UINT16(depth, TCXState),
+        VMSTATE_BUFFER(r, TCXState),
+        VMSTATE_BUFFER(g, TCXState),
+        VMSTATE_BUFFER(b, TCXState),
+        VMSTATE_UINT8(dac_index, TCXState),
+        VMSTATE_UINT8(dac_state, TCXState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static void tcx_reset(DeviceState *d)
 {
-    TCXState *s = opaque;
+    TCXState *s = container_of(d, TCXState, busdev.qdev);
 
     /* Initialize palette */
     memset(s->r, 0, 256);
     memset(s->g, 0, 256);
     memset(s->b, 0, 256);
     s->r[255] = s->g[255] = s->b[255] = 255;
+    update_palette_entries(s, 0, 256);
     memset(s->vram, 0, MAXX*MAXY);
-    cpu_physical_memory_reset_dirty(s->vram_offset, s->vram_offset + MAXX*MAXY,
-                                    VGA_DIRTY_FLAG);
+    cpu_physical_memory_reset_dirty(s->vram_offset, s->vram_offset +
+                                    MAXX * MAXY * (1 + 4 + 4), VGA_DIRTY_FLAG);
     s->dac_index = 0;
     s->dac_state = 0;
 }
@@ -228,75 +435,133 @@ static uint32_t tcx_dac_readl(void *opaque, target_phys_addr_t addr)
 static void tcx_dac_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
 {
     TCXState *s = opaque;
-    uint32_t saddr;
 
-    saddr = (addr & (TCX_DAC_NREGS - 1)) >> 2;
-    switch (saddr) {
+    switch (addr) {
     case 0:
-       s->dac_index = val >> 24;
-       s->dac_state = 0;
-       break;
-    case 1:
-       switch (s->dac_state) {
-       case 0:
-           s->r[s->dac_index] = val >> 24;
-           s->dac_state++;
-           break;
-       case 1:
-           s->g[s->dac_index] = val >> 24;
-           s->dac_state++;
-           break;
-       case 2:
-           s->b[s->dac_index] = val >> 24;
-       default:
-           s->dac_state = 0;
-           break;
-       }
-       break;
+        s->dac_index = val >> 24;
+        s->dac_state = 0;
+        break;
+    case 4:
+        switch (s->dac_state) {
+        case 0:
+            s->r[s->dac_index] = val >> 24;
+            update_palette_entries(s, s->dac_index, s->dac_index + 1);
+            s->dac_state++;
+            break;
+        case 1:
+            s->g[s->dac_index] = val >> 24;
+            update_palette_entries(s, s->dac_index, s->dac_index + 1);
+            s->dac_state++;
+            break;
+        case 2:
+            s->b[s->dac_index] = val >> 24;
+            update_palette_entries(s, s->dac_index, s->dac_index + 1);
+            s->dac_index = (s->dac_index + 1) & 255; // Index autoincrement
+        default:
+            s->dac_state = 0;
+            break;
+        }
+        break;
     default:
-       break;
+        break;
     }
     return;
 }
 
-static CPUReadMemoryFunc *tcx_dac_read[3] = {
-    tcx_dac_readl,
-    tcx_dac_readl,
+static CPUReadMemoryFunc * const tcx_dac_read[3] = {
+    NULL,
+    NULL,
     tcx_dac_readl,
 };
 
-static CPUWriteMemoryFunc *tcx_dac_write[3] = {
-    tcx_dac_writel,
-    tcx_dac_writel,
+static CPUWriteMemoryFunc * const tcx_dac_write[3] = {
+    NULL,
+    NULL,
     tcx_dac_writel,
 };
 
-void tcx_init(DisplayState *ds, uint32_t addr, uint8_t *vram_base,
-             unsigned long vram_offset, int vram_size, int width, int height)
+static uint32_t tcx_dummy_readl(void *opaque, target_phys_addr_t addr)
 {
-    TCXState *s;
-    int io_memory;
+    return 0;
+}
 
-    s = qemu_mallocz(sizeof(TCXState));
-    if (!s)
-        return;
-    s->ds = ds;
-    s->addr = addr;
-    s->vram = vram_base;
+static void tcx_dummy_writel(void *opaque, target_phys_addr_t addr,
+                             uint32_t val)
+{
+}
+
+static CPUReadMemoryFunc * const tcx_dummy_read[3] = {
+    NULL,
+    NULL,
+    tcx_dummy_readl,
+};
+
+static CPUWriteMemoryFunc * const tcx_dummy_write[3] = {
+    NULL,
+    NULL,
+    tcx_dummy_writel,
+};
+
+static int tcx_init1(SysBusDevice *dev)
+{
+    TCXState *s = FROM_SYSBUS(TCXState, dev);
+    int io_memory, dummy_memory;
+    ram_addr_t vram_offset;
+    int size;
+    uint8_t *vram_base;
+
+    vram_offset = qemu_ram_alloc(NULL, "tcx.vram", s->vram_size * (1 + 4 + 4));
+    vram_base = qemu_get_ram_ptr(vram_offset);
     s->vram_offset = vram_offset;
-    s->width = width;
-    s->height = height;
-
-    cpu_register_physical_memory(addr + 0x800000, vram_size, vram_offset);
-    io_memory = cpu_register_io_memory(0, tcx_dac_read, tcx_dac_write, s);
-    cpu_register_physical_memory(addr + 0x200000, TCX_DAC_NREGS, io_memory);
-
-    graphic_console_init(s->ds, tcx_update_display, tcx_invalidate_display,
-                         tcx_screen_dump, s);
-    register_savevm("tcx", addr, 1, tcx_save, tcx_load, s);
-    qemu_register_reset(tcx_reset, s);
-    tcx_reset(s);
-    dpy_resize(s->ds, width, height);
+
+    /* 8-bit plane */
+    s->vram = vram_base;
+    size = s->vram_size;
+    sysbus_init_mmio(dev, size, s->vram_offset);
+    vram_offset += size;
+    vram_base += size;
+
+    /* DAC */
+    io_memory = cpu_register_io_memory(tcx_dac_read, tcx_dac_write, s,
+                                       DEVICE_NATIVE_ENDIAN);
+    sysbus_init_mmio(dev, TCX_DAC_NREGS, io_memory);
+
+    /* TEC (dummy) */
+    dummy_memory = cpu_register_io_memory(tcx_dummy_read, tcx_dummy_write,
+                                          s, DEVICE_NATIVE_ENDIAN);
+    sysbus_init_mmio(dev, TCX_TEC_NREGS, dummy_memory);
+    /* THC: NetBSD writes here even with 8-bit display: dummy */
+    sysbus_init_mmio(dev, TCX_THC_NREGS_24, dummy_memory);
+
+    if (s->depth == 24) {
+        /* 24-bit plane */
+        size = s->vram_size * 4;
+        s->vram24 = (uint32_t *)vram_base;
+        s->vram24_offset = vram_offset;
+        sysbus_init_mmio(dev, size, vram_offset);
+        vram_offset += size;
+        vram_base += size;
+
+        /* Control plane */
+        size = s->vram_size * 4;
+        s->cplane = (uint32_t *)vram_base;
+        s->cplane_offset = vram_offset;
+        sysbus_init_mmio(dev, size, vram_offset);
+
+        s->ds = graphic_console_init(tcx24_update_display,
+                                     tcx24_invalidate_display,
+                                     tcx24_screen_dump, NULL, s);
+    } else {
+        /* THC 8 bit (dummy) */
+        sysbus_init_mmio(dev, TCX_THC_NREGS_8, dummy_memory);
+
+        s->ds = graphic_console_init(tcx_update_display,
+                                     tcx_invalidate_display,
+                                     tcx_screen_dump, NULL, s);
+    }
+
+    qemu_console_resize(s->ds, s->width, s->height);
+    return 0;
 }
 
 static void tcx_screen_dump(void *opaque, const char *filename)
@@ -326,5 +591,61 @@ static void tcx_screen_dump(void *opaque, const char *filename)
     return;
 }
 
+static void tcx24_screen_dump(void *opaque, const char *filename)
+{
+    TCXState *s = opaque;
+    FILE *f;
+    uint8_t *d, *d1, v;
+    uint32_t *s24, *cptr, dval;
+    int y, x;
+
+    f = fopen(filename, "wb");
+    if (!f)
+        return;
+    fprintf(f, "P6\n%d %d\n%d\n", s->width, s->height, 255);
+    d1 = s->vram;
+    s24 = s->vram24;
+    cptr = s->cplane;
+    for(y = 0; y < s->height; y++) {
+        d = d1;
+        for(x = 0; x < s->width; x++, d++, s24++) {
+            if ((*cptr++ & 0xff000000) == 0x03000000) { // 24-bit direct
+                dval = *s24 & 0x00ffffff;
+                fputc((dval >> 16) & 0xff, f);
+                fputc((dval >> 8) & 0xff, f);
+                fputc(dval & 0xff, f);
+            } else {
+                v = *d;
+                fputc(s->r[v], f);
+                fputc(s->g[v], f);
+                fputc(s->b[v], f);
+            }
+        }
+        d1 += MAXX;
+    }
+    fclose(f);
+    return;
+}
+
+static SysBusDeviceInfo tcx_info = {
+    .init = tcx_init1,
+    .qdev.name  = "SUNW,tcx",
+    .qdev.size  = sizeof(TCXState),
+    .qdev.reset = tcx_reset,
+    .qdev.vmsd  = &vmstate_tcx,
+    .qdev.props = (Property[]) {
+        DEFINE_PROP_TADDR("addr",      TCXState, addr,      -1),
+        DEFINE_PROP_HEX32("vram_size", TCXState, vram_size, -1),
+        DEFINE_PROP_UINT16("width",    TCXState, width,     -1),
+        DEFINE_PROP_UINT16("height",   TCXState, height,    -1),
+        DEFINE_PROP_UINT16("depth",    TCXState, depth,     -1),
+        DEFINE_PROP_END_OF_LIST(),
+    }
+};
 
+static void tcx_register_devices(void)
+{
+    sysbus_register_withprop(&tcx_info);
+}
 
+device_init(tcx_register_devices)
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