From 7ecf4901b486693e525d3daafc7d6e9c3a4abcd0 Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Tue, 10 Nov 2026 02:29:20 +0800
Subject: [mubios] Complete VGA text initialization and add VBE graphics
 services

Load the 8x16 font and VGA palette, restore text memory mapping, and synchronize BIOS cursor and page state with the hardware.

Allocate QEMU standard VGA PCI memory resources and expose VBE controller information, mode queries and switching, logical scanline lengths, and display start control.

Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
---
 mubios/drivers/vbe.c      | 433 ++++++++++++++++++++++++++++++++++++++++++++++
 mubios/drivers/vga.c      | 267 ++++++++++++++++++++++------
 mubios/drivers/vga_font.c | 350 +++++++++++++++++++++++++++++++++++++
 3 files changed, 994 insertions(+), 56 deletions(-)
 create mode 100644 mubios/drivers/vbe.c
 create mode 100644 mubios/drivers/vga_font.c

(limited to 'mubios/drivers')

diff --git a/mubios/drivers/vbe.c b/mubios/drivers/vbe.c
new file mode 100644
index 0000000..c85ecf5
--- /dev/null
+++ b/mubios/drivers/vbe.c
@@ -0,0 +1,433 @@
+/*
+ RCC-Project
+
+ Copyright (C) 2026 Richard Qin
+
+ This file is part of RCC-Project.
+
+ RCC-Project is free software; you can redistribute it and/or modify it under
+ the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at your option) any
+ later version.
+
+ RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ RCC-Project; see the file COPYING.  If not see
+ <http://www.gnu.org/licenses/>.
+ */
+
+#include "vbe.h"
+#include "io.h"
+#include "vga.h"
+
+#define PCI_CONFIG_ADDRESS 0x0CF8u
+#define PCI_CONFIG_DATA 0x0CFCu
+#define PCI_COMMAND 0x04u
+#define PCI_BAR0 0x10u
+#define PCI_BAR2 0x18u
+#define PCI_MEMORY_MASK 0xFFFFFFF0u
+#define QEMU_VGA_ID 0x11111234u
+/* Allocate below the platform's high MMIO/firmware area, never in RAM.
+   This is an allocation ceiling, not a framebuffer physical address. */
+#define PCI_MMIO_CEILING 0xF0000000u
+#define DISPI_INDEX 0x01CEu
+#define DISPI_DATA 0x01CFu
+#define DISPI_ID 0u
+#define DISPI_MEMORY_64K 0x0Au
+#define DISPI_ENABLED 0x01u
+#define DISPI_GETCAPS 0x02u
+#define DISPI_LINEAR 0x40u
+#define DISPI_PRESERVE 0x80u
+
+static const struct vbe_mode modes[VBE_MODE_COUNT]
+    = { { 0x111u, 640u, 480u, 16u },   { 0x112u, 640u, 480u, 24u },
+        { 0x142u, 640u, 480u, 32u },   { 0x114u, 800u, 600u, 16u },
+        { 0x115u, 800u, 600u, 24u },   { 0x143u, 800u, 600u, 32u },
+        { 0x117u, 1024u, 768u, 16u },  { 0x118u, 1024u, 768u, 24u },
+        { 0x144u, 1024u, 768u, 32u },  { 0x11Au, 1280u, 1024u, 16u },
+        { 0x11Bu, 1280u, 1024u, 24u }, { 0x145u, 1280u, 1024u, 32u },
+        { 0x11Eu, 1600u, 1200u, 16u }, { 0x11Fu, 1600u, 1200u, 24u },
+        { 0x147u, 1600u, 1200u, 32u } };
+
+struct vbe_state vbe;
+
+static u32
+pci_read (u16 devfn, u8 offset)
+{
+  io_out32 (PCI_CONFIG_ADDRESS,
+            0x80000000u | ((u32)devfn << 8) | (offset & 0xFCu));
+  return io_in32 (PCI_CONFIG_DATA);
+}
+
+static void
+pci_write (u16 devfn, u8 offset, u32 value)
+{
+  io_out32 (PCI_CONFIG_ADDRESS,
+            0x80000000u | ((u32)devfn << 8) | (offset & 0xFCu));
+  io_out32 (PCI_CONFIG_DATA, value);
+}
+
+static void
+pci_write_command (u16 devfn, u16 command)
+{
+  io_out32 (PCI_CONFIG_ADDRESS, 0x80000000u | ((u32)devfn << 8) | PCI_COMMAND);
+  /* Do not write back the write-one-to-clear PCI status word. */
+  io_out16 (PCI_CONFIG_DATA, command);
+}
+
+u16
+vbe_read (u16 index)
+{
+  io_out16 (DISPI_INDEX, index);
+  return io_in16 (DISPI_DATA);
+}
+
+void
+vbe_write (u16 index, u16 value)
+{
+  io_out16 (DISPI_INDEX, index);
+  io_out16 (DISPI_DATA, value);
+}
+
+static u32
+pci_ram_end (void)
+{
+  u16 units = (u16)cmos_read8 (0x34u) | ((u16)cmos_read8 (0x35u) << 8);
+  u16 kib;
+
+  /* QEMU CMOS 34h/35h describes RAM above 16 MiB in 64 KiB units.
+     For smaller guests, 30h/31h describes RAM above 1 MiB in KiB. */
+  if (units != 0u)
+    return 0x01000000u + ((u32)units << 16);
+  kib = (u16)cmos_read8 (0x30u) | ((u16)cmos_read8 (0x31u) << 8);
+  return 0x00100000u + ((u32)kib << 10);
+}
+
+static u32
+pci_allocation_limit (u16 vga_devfn, u32 ram_end)
+{
+  u32 limit = PCI_MMIO_CEILING;
+  u32 value;
+  u32 base;
+  u16 devfn;
+  u8 header;
+  u8 offset;
+
+  /* The default QEMU pc VGA is on root bus 0. Allocate below all existing
+     root-bus memory resources, leaving their full ranges untouched. */
+  for (devfn = 0; devfn < 256u; ++devfn)
+    {
+      if (devfn == vga_devfn || (u16)pci_read (devfn, 0u) == 0xFFFFu)
+        continue;
+      header = (u8)(pci_read (devfn, 0x0Cu) >> 16) & 0x7Fu;
+      for (offset = 0x10u; offset < (header == 0u ? 0x28u : 0x18u);
+           offset += 4u)
+        {
+          value = pci_read (devfn, offset);
+          /* Bit 0 identifies I/O BARs; a 64-bit BAR has type bits 10b. */
+          if ((value & 1u) != 0u)
+            continue;
+          base = value & PCI_MEMORY_MASK;
+          if ((value & 6u) == 4u)
+            {
+              offset += 4u;
+              if (pci_read (devfn, offset) != 0u)
+                continue;
+            }
+          if (base >= ram_end && base < limit)
+            limit = base;
+        }
+      /* Bridge windows and PCI expansion ROMs also occupy address space. */
+      if (header == 1u)
+        {
+          base = (pci_read (devfn, 0x20u) & 0xFFF0u) << 16;
+          if (base >= ram_end && base < limit)
+            limit = base;
+          base = (pci_read (devfn, 0x24u) & 0xFFF0u) << 16;
+          if (pci_read (devfn, 0x28u) == 0u && base >= ram_end && base < limit)
+            limit = base;
+        }
+      value = pci_read (devfn, header == 1u ? 0x38u : 0x30u);
+      base = value & 0xFFFFF800u;
+      if (base >= ram_end && base < limit)
+        limit = base;
+    }
+  return limit;
+}
+
+static u32
+pci_bar_size (u16 devfn, u8 offset)
+{
+  u32 saved = pci_read (devfn, offset);
+  u32 mask;
+
+  /* PCI sizing is done with memory decoding disabled by the caller. */
+  pci_write (devfn, offset, 0xFFFFFFFFu);
+  mask = pci_read (devfn, offset);
+  pci_write (devfn, offset, saved);
+  /* This driver uses QEMU standard VGA's 32-bit memory BARs only. */
+  if ((mask & 7u) != 0u || (mask & PCI_MEMORY_MASK) == 0u)
+    return 0u;
+  return ~(mask & PCI_MEMORY_MASK) + 1u;
+}
+
+static int
+pci_configure_vga (u16 devfn)
+{
+  u16 command = (u16)pci_read (devfn, PCI_COMMAND);
+  u32 old_framebuffer = pci_read (devfn, PCI_BAR0);
+  u32 old_registers = pci_read (devfn, PCI_BAR2);
+  u32 ram_end = pci_ram_end ();
+  u32 limit = pci_allocation_limit (devfn, ram_end);
+  u32 framebuffer_size;
+  u32 registers_size;
+  u32 framebuffer;
+  u32 registers = 0u;
+
+  pci_write_command (devfn, (u16)(command & ~3u));
+  framebuffer_size = pci_bar_size (devfn, PCI_BAR0);
+  registers_size = pci_bar_size (devfn, PCI_BAR2);
+  /* PCI memory BARs must fit, aligned to their probed power-of-two size,
+     entirely above guest RAM and below the platform MMIO ceiling. */
+  if (framebuffer_size == 0u || framebuffer_size > limit)
+    goto fail;
+  framebuffer = (limit - framebuffer_size) & ~(framebuffer_size - 1u);
+  if (framebuffer < ram_end)
+    goto fail;
+  if (registers_size != 0u)
+    {
+      if (registers_size > framebuffer)
+        goto fail;
+      registers = (framebuffer - registers_size) & ~(registers_size - 1u);
+      if (registers < ram_end)
+        goto fail;
+    }
+
+  pci_write (devfn, PCI_BAR0, framebuffer | (old_framebuffer & 0xFu));
+  if (registers_size != 0u)
+    pci_write (devfn, PCI_BAR2, registers | (old_registers & 0xFu));
+  /* A rejected BAR assignment must not be exposed as a usable framebuffer. */
+  if ((pci_read (devfn, PCI_BAR0) & PCI_MEMORY_MASK) != framebuffer
+      || (registers_size != 0u
+          && (pci_read (devfn, PCI_BAR2) & PCI_MEMORY_MASK) != registers))
+    goto fail;
+
+  pci_write_command (devfn, (u16)(command | 3u));
+  vbe.framebuffer = pci_read (devfn, PCI_BAR0) & PCI_MEMORY_MASK;
+  vbe.memory_size = (u32)vbe_read (DISPI_MEMORY_64K) << 16;
+  /* The CPU mapping must cover all advertised video memory. */
+  if (vbe.memory_size == 0u || vbe.memory_size > framebuffer_size)
+    goto fail;
+  return 1;
+
+fail:
+  pci_write_command (devfn, (u16)(command & ~3u));
+  pci_write (devfn, PCI_BAR0, old_framebuffer);
+  pci_write (devfn, PCI_BAR2, old_registers);
+  pci_write_command (devfn, command);
+  vbe.framebuffer = 0u;
+  vbe.memory_size = 0u;
+  return 0;
+}
+
+static int
+mode_supported (const struct vbe_mode *mode)
+{
+  /* Advertise only modes within DISPI capabilities and installed VRAM. */
+  return vbe.present && mode->width <= vbe.max_width
+         && mode->height <= vbe.max_height && mode->bpp <= vbe.max_bpp
+         && (u32)mode->width * mode->height * (mode->bpp / 8u)
+                <= vbe.memory_size;
+}
+
+const struct vbe_mode *
+vbe_find_mode (u16 number)
+{
+  u8 index;
+
+  for (index = 0; index < VBE_MODE_COUNT; ++index)
+    if (modes[index].number == number && mode_supported (&modes[index]))
+      return &modes[index];
+  return (const struct vbe_mode *)0;
+}
+
+void
+vbe_init (void)
+{
+  u16 devfn;
+  u16 enable;
+  u8 index;
+  u8 count = 0u;
+
+  vbe.current_mode = 0x03u;
+  for (devfn = 0; devfn < 256u; ++devfn)
+    if (pci_read (devfn, 0u) == QEMU_VGA_ID
+        && (pci_read (devfn, 0x08u) >> 16) == 0x0300u)
+      break;
+  /* Absence of the supported PCI device must leave text VGA available. */
+  if (devfn == 256u)
+    return;
+  vbe_write (DISPI_ID, 0xB0C5u);
+  if (vbe_read (DISPI_ID) != 0xB0C5u || !pci_configure_vga (devfn))
+    return;
+
+  enable = vbe_read (DISPI_ENABLE);
+  vbe_write (DISPI_ENABLE, (u16)(enable | DISPI_GETCAPS));
+  vbe.max_width = vbe_read (DISPI_XRES);
+  vbe.max_height = vbe_read (DISPI_YRES);
+  vbe.max_bpp = vbe_read (DISPI_BPP);
+  vbe_write (DISPI_ENABLE, enable);
+  vbe.present = 1u;
+  for (index = 0; index < VBE_MODE_COUNT; ++index)
+    if (mode_supported (&modes[index]))
+      vbe.mode_list[count++] = modes[index].number;
+  vbe.mode_list[count] = 0xFFFFu;
+}
+
+void
+vbe_leave_graphics (void)
+{
+  if (vbe.present)
+    vbe_write (DISPI_ENABLE, 0u);
+  vbe.current_mode = 0x03u;
+}
+
+static void
+graphics_registers (void)
+{
+  /* DISPI sets graphics timing; enable VGA planes and attribute output too. */
+  io_out8 (0x03C4u, 0x01u);
+  io_out8 (0x03C5u, 0x01u);
+  io_out8 (0x03C4u, 0x02u);
+  io_out8 (0x03C5u, 0x0Fu);
+  io_out8 (0x03C4u, 0x04u);
+  io_out8 (0x03C5u, 0x0Eu);
+  io_out8 (0x03CEu, 0x05u);
+  io_out8 (0x03CFu, 0x40u);
+  io_out8 (0x03CEu, 0x06u);
+  io_out8 (0x03CFu, 0x05u);
+  io_in8 (0x03DAu);
+  io_out8 (0x03C0u, 0x10u);
+  io_out8 (0x03C0u, 0x41u);
+  io_in8 (0x03DAu);
+  io_out8 (0x03C0u, 0x20u);
+}
+
+u16
+vbe_set_mode (u16 request)
+{
+  const struct vbe_mode *mode;
+  volatile u8 *bda = (volatile u8 *)MUBIOS_BDA_BASE;
+  u16 saved[10];
+  u16 index;
+  u16 enable;
+  u16 number = request & 0x3FFFu;
+  u8 old_video_ctl = bda[BDA_VIDEO_CTL];
+  volatile u32 *pixel;
+  u32 words;
+
+  if (number == 0x03u)
+    {
+      vga_text_mode_set ((u8)((request >> 8) & 0x80u));
+      return VBE_OK;
+    }
+  mode = vbe_find_mode (number);
+  /* Only LFB access is implemented. Bit 11 requests a VBE 3.0 CRTC block;
+     banked modes and custom timings are not supported or advertised. */
+  if (mode == (const struct vbe_mode *)0 || (request & VBE_MODE_LINEAR) == 0u)
+    return VBE_FAILED;
+
+  for (index = 0; index < 10u; ++index)
+    saved[index] = vbe_read (index);
+  vbe_write (DISPI_ENABLE, 0u);
+  vbe_write (DISPI_BPP, mode->bpp);
+  vbe_write (DISPI_XRES, mode->width);
+  vbe_write (DISPI_YRES, mode->height);
+  vbe_write (DISPI_BANK, 0u);
+  /* Delay clearing until the actual programmed mode has been verified. */
+  enable = DISPI_ENABLED | DISPI_LINEAR | DISPI_PRESERVE;
+  vbe_write (DISPI_ENABLE, enable);
+  if (vbe_read (DISPI_XRES) != mode->width
+      || vbe_read (DISPI_YRES) != mode->height
+      || vbe_read (DISPI_BPP) != mode->bpp
+      || vbe_read (DISPI_VIRT_WIDTH) != mode->width
+      || (vbe_read (DISPI_ENABLE) & (DISPI_ENABLED | DISPI_LINEAR))
+             != (DISPI_ENABLED | DISPI_LINEAR))
+    {
+      /* Restore the prior hardware state on a rejected mode request. */
+      vbe_write (DISPI_ENABLE, 0u);
+      for (index = 1u; index <= DISPI_BPP; ++index)
+        vbe_write (index, saved[index]);
+      vbe_write (DISPI_ENABLE, saved[DISPI_ENABLE] | DISPI_PRESERVE);
+      vbe_write (DISPI_BANK, saved[DISPI_BANK]);
+      vbe_write (DISPI_VIRT_WIDTH, saved[DISPI_VIRT_WIDTH]);
+      vbe_write (DISPI_X_OFFSET, saved[DISPI_X_OFFSET]);
+      vbe_write (DISPI_Y_OFFSET, saved[DISPI_Y_OFFSET]);
+      vbe_write (DISPI_ENABLE, saved[DISPI_ENABLE]);
+      /* Disabling DISPI alone does not restore text CRTC/graphics registers.
+       */
+      if ((saved[DISPI_ENABLE] & DISPI_ENABLED) == 0u)
+        {
+          vga_text_mode_set (0x80u);
+          bda[BDA_VIDEO_CTL] = old_video_ctl;
+          vbe.current_mode
+              = (u16)(0x03u | ((u16)(old_video_ctl & 0x80u) << 8));
+        }
+      return VBE_FAILED;
+    }
+
+  graphics_registers ();
+  if ((request & VBE_MODE_PRESERVE) == 0u)
+    {
+      pixel = (volatile u32 *)vbe.framebuffer;
+      words = vbe.memory_size / sizeof (*pixel);
+      while (words-- != 0u)
+        *pixel++ = 0u;
+      enable &= (u16)~DISPI_PRESERVE;
+      vbe_write (DISPI_ENABLE, enable);
+    }
+  vbe.current_mode = request;
+  /* FFh denotes a non-legacy video mode; no mode-03h geometry is claimed. */
+  bda[BDA_VIDEO_MODE] = 0xFFu;
+  *(volatile u16 *)(bda + BDA_VIDEO_COLUMNS) = mode->width / 8u;
+  *(volatile u16 *)(bda + BDA_VIDEO_PAGE_SIZE) = 0u;
+  *(volatile u16 *)(bda + BDA_VIDEO_PAGE_START) = 0u;
+  bda[BDA_VIDEO_PAGE] = 0u;
+  for (index = 0u; index < VGA_PAGE_COUNT; ++index)
+    *(volatile u16 *)(bda + BDA_CURSOR_BASE + index * 2u) = 0u;
+  *(volatile u16 *)(bda + BDA_CURSOR_SHAPE) = 0u;
+  bda[BDA_VIDEO_ROWS] = (u8)(mode->height / VGA_FONT_HEIGHT - 1u);
+  *(volatile u16 *)(bda + BDA_VIDEO_HEIGHT) = VGA_FONT_HEIGHT;
+  bda[BDA_VIDEO_CTL] = (u8)(0x60u | ((request >> 8) & 0x80u));
+  return VBE_OK;
+}
+
+u16
+vbe_get_mode (u16 *number)
+{
+  u8 index;
+  u16 enable = vbe_read (DISPI_ENABLE);
+
+  /* GRUB's native Bochs driver may program DISPI without calling INT 10h.
+     Query hardware instead of returning a stale BIOS mode number. */
+  if ((enable & DISPI_ENABLED) == 0u)
+    {
+      *number = (u16)(0x03u | (vbe.current_mode & VBE_MODE_PRESERVE));
+      return VBE_OK;
+    }
+  for (index = 0; index < VBE_MODE_COUNT; ++index)
+    if (mode_supported (&modes[index])
+        && modes[index].width == vbe_read (DISPI_XRES)
+        && modes[index].height == vbe_read (DISPI_YRES)
+        && modes[index].bpp == vbe_read (DISPI_BPP))
+      {
+        *number = modes[index].number
+                  | ((enable & DISPI_LINEAR) != 0u ? VBE_MODE_LINEAR : 0u)
+                  | ((enable & DISPI_PRESERVE) != 0u ? VBE_MODE_PRESERVE : 0u);
+        return VBE_OK;
+      }
+  return VBE_FAILED;
+}
diff --git a/mubios/drivers/vga.c b/mubios/drivers/vga.c
index 16f88e5..4bd14b1 100644
--- a/mubios/drivers/vga.c
+++ b/mubios/drivers/vga.c
@@ -6,83 +6,211 @@
  This file is part of RCC-Project.
 
  RCC-Project is free software; you can redistribute it and/or modify it under
- the terms of the GNU General Public License as published by the Free Software
- Foundation; either version 3 of the License, or (at your option) any later
- version.
- */
+ the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at your option) any
+ later version.
 
-#include "bios.h"
-#include "io.h"
+ RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 
-#define VGA_TEXT_BASE 0x000B8000u
-#define VGA_TEXT_CELLS 2000u
+ You should have received a copy of the GNU General Public License along with
+ RCC-Project; see the file COPYING.  If not see
+ <http://www.gnu.org/licenses/>.
+ */
 
-#define BDA_VIDEO_MODE 0x0049u
-#define BDA_VIDEO_COLUMNS 0x004Au
-#define BDA_VIDEO_PAGE_SIZE 0x004Cu
-#define BDA_VIDEO_PAGE 0x0062u
-#define BDA_CURSOR_BASE 0x0450u
-#define BDA_CURSOR_SHAPE 0x0460u
+#include "vga.h"
+#include "io.h"
+#include "vbe.h"
 
 #define VGA_MISC_OUTPUT_WRITE 0x03C2u
 #define VGA_SEQ_INDEX 0x03C4u
-#define VGA_SEQ_DATA 0x03C5u
 #define VGA_CRTC_INDEX 0x03D4u
-#define VGA_CRTC_DATA 0x03D5u
 #define VGA_GC_INDEX 0x03CEu
-#define VGA_GC_DATA 0x03CFu
 #define VGA_INPUT_STATUS 0x03DAu
 #define VGA_ATTR_INDEX_DATA 0x03C0u
+#define VGA_PEL_MASK 0x03C6u
+#define VGA_DAC_WRITE_INDEX 0x03C8u
+#define VGA_DAC_DATA 0x03C9u
+#define VGA_FONT_BASE 0x000A0000u
+
+static void
+vga_write_register (u16 port, u8 index, u8 value)
+{
+  io_out8 (port, index);
+  io_out8 ((u16)(port + 1u), value);
+}
 
 static void
-vga_write_registers (u16 index_port, u16 data_port, const u8 *values, u8 count)
+vga_write_registers (u16 port, const u8 *values, u8 count)
 {
   u8 index;
 
   for (index = 0; index < count; ++index)
+    vga_write_register (port, index, values[index]);
+}
+
+static void
+vga_load_font (void)
+{
+  volatile u8 *plane = (volatile u8 *)VGA_FONT_BASE;
+  u16 character;
+  u8 line;
+
+  /* Select plane 2 and disable odd/even addressing while writing glyphs. */
+  vga_write_register (VGA_SEQ_INDEX, 0x00u, 0x01u);
+  vga_write_register (VGA_SEQ_INDEX, 0x02u, 0x04u);
+  vga_write_register (VGA_SEQ_INDEX, 0x04u, 0x07u);
+  vga_write_register (VGA_SEQ_INDEX, 0x00u, 0x03u);
+  vga_write_register (VGA_GC_INDEX, 0x04u, 0x02u);
+  vga_write_register (VGA_GC_INDEX, 0x05u, 0x00u);
+  vga_write_register (VGA_GC_INDEX, 0x06u, 0x04u);
+
+  for (character = 0; character < 256u; ++character)
     {
-      io_out8 (index_port, index);
-      io_out8 (data_port, values[index]);
+      for (line = 0; line < VGA_FONT_HEIGHT; ++line)
+        plane[character * 32u + line]
+            = vga_font_8x16[character * VGA_FONT_HEIGHT + line];
+      for (; line < 32u; ++line)
+        plane[character * 32u + line] = 0u;
+    }
+
+  /* Restore the B8000 text aperture and character/attribute plane mapping. */
+  vga_write_register (VGA_SEQ_INDEX, 0x00u, 0x01u);
+  vga_write_register (VGA_SEQ_INDEX, 0x02u, 0x03u);
+  vga_write_register (VGA_SEQ_INDEX, 0x03u, 0x00u);
+  vga_write_register (VGA_SEQ_INDEX, 0x04u, 0x03u);
+  vga_write_register (VGA_SEQ_INDEX, 0x00u, 0x03u);
+  vga_write_register (VGA_GC_INDEX, 0x06u, 0x0Eu);
+  vga_write_register (VGA_GC_INDEX, 0x04u, 0x00u);
+  vga_write_register (VGA_GC_INDEX, 0x05u, 0x10u);
+}
+
+static void
+vga_load_palette (void)
+{
+  u16 index;
+
+  io_out8 (VGA_PEL_MASK, 0xFFu);
+  io_out8 (VGA_DAC_WRITE_INDEX, 0u);
+  /* Mode 03h uses the 64 EGA colors, each DAC component is six bits. */
+  for (index = 0; index < 64u; ++index)
+    {
+      io_out8 (VGA_DAC_DATA, (u8)(((index >> 2) & 1u) * 0x2Au
+                                  + ((index >> 5) & 1u) * 0x15u));
+      io_out8 (VGA_DAC_DATA, (u8)(((index >> 1) & 1u) * 0x2Au
+                                  + ((index >> 4) & 1u) * 0x15u));
+      io_out8 (VGA_DAC_DATA,
+               (u8)((index & 1u) * 0x2Au + ((index >> 3) & 1u) * 0x15u));
+    }
+  for (; index < 256u; ++index)
+    {
+      io_out8 (VGA_DAC_DATA, 0u);
+      io_out8 (VGA_DAC_DATA, 0u);
+      io_out8 (VGA_DAC_DATA, 0u);
     }
 }
 
 void
-vga_text_mode_init (void)
+vga_set_cursor_shape (u16 shape)
+{
+  volatile u8 *bda = (volatile u8 *)MUBIOS_BDA_BASE;
+  u8 start = (u8)((shape >> 8) & 0x3Fu);
+  u8 end = (u8)(shape & 0x1Fu);
+  u16 height = *(volatile u16 *)(bda + BDA_VIDEO_HEIGHT);
+
+  *(volatile u16 *)(bda + BDA_CURSOR_SHAPE) = shape;
+  /* VGA BIOS scales an eight-scanline cursor unless emulation is disabled.
+     Start bit 5 disables the cursor and must not be scaled. */
+  if ((bda[BDA_VIDEO_CTL] & 1u) == 0u && height > 8u && end < 8u
+      && start < 0x20u)
+    {
+      if (end != start + 1u)
+        start = (u8)(((start + 1u) * height / 8u) - 1u);
+      else
+        start = (u8)(((end + 1u) * height / 8u) - 2u);
+      end = (u8)(((end + 1u) * height / 8u) - 1u);
+    }
+  vga_write_register (VGA_CRTC_INDEX, 0x0Au, start);
+  vga_write_register (VGA_CRTC_INDEX, 0x0Bu, end);
+}
+
+void
+vga_set_cursor_position (u8 page, u16 position)
+{
+  volatile u8 *bda = (volatile u8 *)MUBIOS_BDA_BASE;
+  u16 address;
+
+  /* INT 10h exposes eight text pages. */
+  if (page >= VGA_PAGE_COUNT)
+    return;
+
+  *(volatile u16 *)(bda + BDA_CURSOR_BASE + page * 2u) = position;
+  if (page != bda[BDA_VIDEO_PAGE])
+    return;
+
+  address = (u16)(page * (VGA_PAGE_SIZE / 2u) + (position >> 8) * VGA_COLUMNS
+                  + (position & 0xFFu));
+  vga_write_register (VGA_CRTC_INDEX, 0x0Eu, (u8)(address >> 8));
+  vga_write_register (VGA_CRTC_INDEX, 0x0Fu, (u8)address);
+}
+
+void
+vga_set_active_page (u8 page)
 {
-  static const u8 sequencer[] = { 0x00u, 0x00u, 0x03u, 0x00u, 0x02u };
+  volatile u8 *bda = (volatile u8 *)MUBIOS_BDA_BASE;
+  u16 offset;
+
+  /* Each page occupies 4 KiB within the 32 KiB text aperture. */
+  if (page >= VGA_PAGE_COUNT)
+    return;
+
+  offset = (u16)(page * VGA_PAGE_SIZE);
+  bda[BDA_VIDEO_PAGE] = page;
+  *(volatile u16 *)(bda + BDA_VIDEO_PAGE_START) = offset;
+  vga_write_register (VGA_CRTC_INDEX, 0x0Cu, (u8)((offset / 2u) >> 8));
+  vga_write_register (VGA_CRTC_INDEX, 0x0Du, (u8)(offset / 2u));
+  vga_set_cursor_position (
+      page, *(volatile u16 *)(bda + BDA_CURSOR_BASE + page * 2u));
+}
+
+void
+vga_text_mode_set (u8 preserve)
+{
+  /* Standard VGA 80x25, 720x400 mode 03h values, as used by SeaVGABIOS. */
+  static const u8 sequencer[] = { 0x01u, 0x00u, 0x03u, 0x00u, 0x02u };
   static const u8 crtc[]
       = { 0x5Fu, 0x4Fu, 0x50u, 0x82u, 0x55u, 0x81u, 0xBFu, 0x1Fu, 0x00u,
           0x4Fu, 0x0Du, 0x0Eu, 0x00u, 0x00u, 0x00u, 0x00u, 0x9Cu, 0x8Eu,
           0x8Fu, 0x28u, 0x1Fu, 0x96u, 0xB9u, 0xA3u, 0xFFu };
   static const u8 graphics[]
-      = { 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x10u, 0x0Fu, 0x00u, 0xFFu };
+      = { 0x00u, 0x00u, 0x00u, 0x00u, 0x00u, 0x10u, 0x0Eu, 0x0Fu, 0xFFu };
   static const u8 attributes[]
-      = { 0x00u, 0x01u, 0x02u, 0x03u, 0x04u, 0x05u, 0x06u,
-          0x07u, 0x08u, 0x09u, 0x0Au, 0x0Bu, 0x0Cu, 0x0Du,
-          0x0Eu, 0x0Fu, 0x0Cu, 0x00u, 0x0Fu, 0x08u, 0x00u };
-  volatile u16 *video;
-  volatile u8 *bda;
+      = { 0x00u, 0x01u, 0x02u, 0x03u, 0x04u, 0x05u, 0x14u,
+          0x07u, 0x38u, 0x39u, 0x3Au, 0x3Bu, 0x3Cu, 0x3Du,
+          0x3Eu, 0x3Fu, 0x0Cu, 0x00u, 0x0Fu, 0x08u, 0x00u };
+  volatile u16 *video = (volatile u16 *)VGA_TEXT_BASE;
+  volatile u8 *bda = (volatile u8 *)MUBIOS_BDA_BASE;
+  u32 font_address = (u32)vga_font_8x16;
+  volatile u16 *font_vector = (volatile u16 *)(0x43u * 4u);
   u16 cell;
   u8 index;
 
-  io_out8 (VGA_MISC_OUTPUT_WRITE, 0x67u);
+  vbe_leave_graphics ();
 
-  io_out8 (VGA_SEQ_INDEX, 0x00u);
-  io_out8 (VGA_SEQ_DATA, 0x01u);
-  for (index = 1; index < 5u; ++index)
-    {
-      io_out8 (VGA_SEQ_INDEX, index);
-      io_out8 (VGA_SEQ_DATA, sequencer[index]);
-    }
-  io_out8 (VGA_SEQ_INDEX, 0x00u);
-  io_out8 (VGA_SEQ_DATA, 0x03u);
-
-  io_out8 (VGA_CRTC_INDEX, 0x11u);
-  io_out8 (VGA_CRTC_DATA, 0x00u);
-  vga_write_registers (VGA_CRTC_INDEX, VGA_CRTC_DATA, crtc, 25);
-
-  vga_write_registers (VGA_GC_INDEX, VGA_GC_DATA, graphics, 9);
+  /* Keep attribute-controller output blank until registers and RAM are ready.
+   */
+  io_in8 (VGA_INPUT_STATUS);
+  io_out8 (VGA_ATTR_INDEX_DATA, 0x00u);
+  vga_write_register (VGA_SEQ_INDEX, 0x00u, 0x01u);
+  io_out8 (VGA_MISC_OUTPUT_WRITE, 0x67u);
+  vga_write_registers (VGA_SEQ_INDEX, sequencer, 5u);
+  vga_write_register (VGA_SEQ_INDEX, 0x00u, 0x03u);
 
+  /* Clear CRTC write protection before programming timing registers. */
+  vga_write_register (VGA_CRTC_INDEX, 0x11u, 0x00u);
+  vga_write_registers (VGA_CRTC_INDEX, crtc, 25u);
+  vga_write_registers (VGA_GC_INDEX, graphics, 9u);
   for (index = 0; index < 21u; ++index)
     {
       io_in8 (VGA_INPUT_STATUS);
@@ -90,20 +218,47 @@ vga_text_mode_init (void)
       io_out8 (VGA_ATTR_INDEX_DATA, attributes[index]);
     }
 
+  vga_load_palette ();
+  vga_load_font ();
+
+  /* AL bit 7 requests a mode change without clearing text video memory. */
+  if (preserve == 0u)
+    for (cell = 0; cell < VGA_PAGE_COUNT * VGA_PAGE_SIZE / 2u; ++cell)
+      video[cell] = 0x0720u;
+
+  bda[BDA_VIDEO_MODE] = 0x03u;
+  *(volatile u16 *)(bda + BDA_VIDEO_COLUMNS) = VGA_COLUMNS;
+  *(volatile u16 *)(bda + BDA_VIDEO_PAGE_SIZE) = VGA_PAGE_SIZE;
+  for (index = 0; index < VGA_PAGE_COUNT; ++index)
+    *(volatile u16 *)(bda + BDA_CURSOR_BASE + index * 2u) = 0u;
+  *(volatile u16 *)(bda + BDA_VIDEO_CRTC) = VGA_CRTC_INDEX;
+  bda[BDA_VIDEO_MSR] = 0x29u;
+  bda[BDA_VIDEO_PALETTE] = 0u;
+  bda[BDA_VIDEO_ROWS] = VGA_ROWS - 1u;
+  *(volatile u16 *)(bda + BDA_VIDEO_HEIGHT) = VGA_FONT_HEIGHT;
+  bda[BDA_VIDEO_CTL] = (u8)(0x60u | (preserve & 0x80u));
+  vbe.current_mode = (u16)(0x03u | ((u16)(preserve & 0x80u) << 8));
+  bda[BDA_VIDEO_SWITCHES] = 0xF9u;
+  bda[BDA_VIDEO_MODESET_CTL] &= 0x7Fu;
+  bda[BDA_VIDEO_DCC] = 0x08u;
+
+  /* INT 43h identifies the ROM font through a real-mode segment:offset. */
+  font_vector[0] = (u16)(font_address & 0x0Fu);
+  font_vector[1] = (u16)(font_address >> 4);
+  vga_set_cursor_shape (0x0607u);
+  vga_set_active_page (0u);
+
   io_in8 (VGA_INPUT_STATUS);
   io_out8 (VGA_ATTR_INDEX_DATA, 0x20u);
+}
 
-  video = (volatile u16 *)VGA_TEXT_BASE;
-  for (cell = 0; cell < VGA_TEXT_CELLS; ++cell)
-    video[cell] = 0x0720u;
+void
+vga_text_mode_init (void)
+{
+  volatile u8 *bda = (volatile u8 *)MUBIOS_BDA_BASE;
 
-  bda = (volatile u8 *)MUBIOS_BDA_BASE;
-  bda[BDA_VIDEO_MODE] = 0x03u;
-  bda[BDA_VIDEO_PAGE] = 0x00u;
-  bda[BDA_VIDEO_COLUMNS] = 80u;
-  bda[BDA_VIDEO_COLUMNS + 1u] = 0u;
-  bda[BDA_VIDEO_PAGE_SIZE] = 0x00u;
-  bda[BDA_VIDEO_PAGE_SIZE + 1u] = 0x10u;
-  *(volatile u16 *)(bda + BDA_CURSOR_BASE) = 0u;
-  *(volatile u16 *)(bda + BDA_CURSOR_SHAPE) = 0x0607u;
+  /* VGA is present, with a color display and the default 400-line timing. */
+  bda[BDA_VIDEO_MODESET_CTL] = 0x51u;
+  vbe_init ();
+  vga_text_mode_set (0u);
 }
diff --git a/mubios/drivers/vga_font.c b/mubios/drivers/vga_font.c
new file mode 100644
index 0000000..09d0ae0
--- /dev/null
+++ b/mubios/drivers/vga_font.c
@@ -0,0 +1,350 @@
+/*
+ RCC-Project
+
+ Copyright (C) 2026 Richard Qin
+
+ This file is part of RCC-Project.
+
+ RCC-Project is free software; you can redistribute it and/or modify it under
+ the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at your option) any
+ later version.
+
+ RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ RCC-Project; see the file COPYING.  If not see
+ <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * 8x16 font from SeaBIOS vgasrc/vgafonts.c:
+ * https://github.com/coreboot/seabios/blob/master/vgasrc/vgafonts.c
+ *
+ * The font collection fntcol16.zip is copyright Joseph Gil.
+ * The individual fonts are public domain.
+ */
+
+#include "vga.h"
+
+const u8 vga_font_8x16[256 * VGA_FONT_HEIGHT] = {
+
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0x81, 0xa5, 0x81, 0x81, 0xbd, 0x99, 0x81,
+  0x81, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0xff, 0xdb, 0xff, 0xff,
+  0xc3, 0xe7, 0xff, 0xff, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x6c, 0xfe, 0xfe, 0xfe, 0xfe, 0x7c, 0x38, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x10, 0x38, 0x7c, 0xfe, 0x7c, 0x38, 0x10, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x3c, 0x3c, 0xe7, 0xe7, 0xe7, 0x18, 0x18,
+  0x3c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x3c, 0x7e, 0xff, 0xff,
+  0x7e, 0x18, 0x18, 0x3c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x18, 0x3c, 0x3c, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
+  0xff, 0xff, 0xff, 0xff, 0xe7, 0xc3, 0xc3, 0xe7, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x66, 0x42, 0x42, 0x66, 0x3c, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc3, 0x99, 0xbd, 0xbd,
+  0x99, 0xc3, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x1e, 0x0e, 0x1a, 0x32,
+  0x78, 0xcc, 0xcc, 0xcc, 0xcc, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
+  0x66, 0x66, 0x66, 0x66, 0x3c, 0x18, 0x7e, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x3f, 0x33, 0x3f, 0x30, 0x30, 0x30, 0x30, 0x70, 0xf0, 0xe0, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0x63, 0x7f, 0x63, 0x63, 0x63, 0x63, 0x67,
+  0xe7, 0xe6, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0xdb, 0x3c,
+  0xe7, 0x3c, 0xdb, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0xe0,
+  0xf0, 0xf8, 0xfe, 0xf8, 0xf0, 0xe0, 0xc0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x02, 0x06, 0x0e, 0x1e, 0x3e, 0xfe, 0x3e, 0x1e, 0x0e, 0x06, 0x02, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x18, 0x3c, 0x7e, 0x18, 0x18, 0x18, 0x7e, 0x3c, 0x18,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66,
+  0x66, 0x00, 0x66, 0x66, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xdb, 0xdb,
+  0xdb, 0x7b, 0x1b, 0x1b, 0x1b, 0x1b, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7c,
+  0xc6, 0x60, 0x38, 0x6c, 0xc6, 0xc6, 0x6c, 0x38, 0x0c, 0xc6, 0x7c, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0xfe, 0xfe, 0xfe,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x3c, 0x7e, 0x18, 0x18, 0x18, 0x7e,
+  0x3c, 0x18, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x3c, 0x7e, 0x18,
+  0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18,
+  0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x7e, 0x3c, 0x18, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x0c, 0xfe, 0x0c, 0x18, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x60, 0xfe, 0x60, 0x30,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0,
+  0xc0, 0xc0, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x24, 0x66, 0xff, 0x66, 0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x10, 0x38, 0x38, 0x7c, 0x7c, 0xfe, 0xfe, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0xfe, 0x7c, 0x7c, 0x38, 0x38, 0x10,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x3c, 0x3c,
+  0x3c, 0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x66,
+  0x66, 0x66, 0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x6c, 0x6c, 0xfe, 0x6c, 0x6c, 0x6c, 0xfe, 0x6c, 0x6c,
+  0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x7c, 0xc6, 0xc2, 0xc0, 0x7c, 0x06, 0x06,
+  0x86, 0xc6, 0x7c, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc2, 0xc6,
+  0x0c, 0x18, 0x30, 0x60, 0xc6, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x38,
+  0x6c, 0x6c, 0x38, 0x76, 0xdc, 0xcc, 0xcc, 0xcc, 0x76, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x30, 0x30, 0x30, 0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x18, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30,
+  0x18, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x18, 0x0c, 0x0c, 0x0c,
+  0x0c, 0x0c, 0x0c, 0x18, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x66, 0x3c, 0xff, 0x3c, 0x66, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x7e, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18,
+  0x18, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x02, 0x06, 0x0c, 0x18, 0x30, 0x60, 0xc0, 0x80, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x3c, 0x66, 0xc3, 0xc3, 0xdb, 0xdb, 0xc3, 0xc3, 0x66, 0x3c,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x38, 0x78, 0x18, 0x18, 0x18, 0x18,
+  0x18, 0x18, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7c, 0xc6, 0x06, 0x0c,
+  0x18, 0x30, 0x60, 0xc0, 0xc6, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7c,
+  0xc6, 0x06, 0x06, 0x3c, 0x06, 0x06, 0x06, 0xc6, 0x7c, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x0c, 0x1c, 0x3c, 0x6c, 0xcc, 0xfe, 0x0c, 0x0c, 0x0c, 0x1e, 0x00,
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+  0x00
+};
-- 
cgit v1.2.3