vgabios: Move vbe code from vgabios.c to new file vbe.c.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

3 files changed, 304 insertions, 289 deletions

diff --git a/vgasrc/vbe.c b/vgasrc/vbe.c
new file mode 100644
index 0000000..f598921
--- /dev/null
+++ b/vgasrc/vbe.c
@@ -0,0 +1,301 @@
+// Video Bios Extensions handlers
+//
+// Copyright (C) 2009  Kevin O'Connor <kevin@koconnor.net>
+// Copyright (C) 2001-2008 the LGPL VGABios developers Team
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+
+#include "vgabios.h" // handle_104f
+#include "config.h" // CONFIG_*
+#include "bregs.h" // struct bregs
+#include "vbe.h" // struct vbe_info
+#include "util.h" // dprintf
+#include "biosvar.h" // get_global_set
+#include "bochsvga.h" // bochsvga_set_mode
+
+static void
+vbe_104f00(struct bregs *regs)
+{
+    u16 seg = regs->es;
+    struct vbe_info *info = (void*)(regs->di+0);
+
+    if (GET_FARVAR(seg, info->signature) == VBE2_SIGNATURE) {
+        dprintf(4, "Get VBE Controller: VBE2 Signature found\n");
+    } else if (GET_FARVAR(seg, info->signature) == VESA_SIGNATURE) {
+        dprintf(4, "Get VBE Controller: VESA Signature found\n");
+    } else {
+        dprintf(4, "Get VBE Controller: Invalid Signature\n");
+    }
+
+    memset_far(seg, info, 0, sizeof(*info));
+
+    SET_FARVAR(seg, info->signature, VESA_SIGNATURE);
+
+    SET_FARVAR(seg, info->version, 0x0200);
+
+    SET_FARVAR(seg, info->oem_string,
+            SEGOFF(get_global_seg(), (u32)VBE_OEM_STRING));
+    SET_FARVAR(seg, info->capabilities, 0x1); /* 8BIT DAC */
+
+    /* We generate our mode list in the reserved field of the info block */
+    SET_FARVAR(seg, info->video_mode, SEGOFF(seg, regs->di + 34));
+
+    /* Total memory (in 64 blocks) */
+    SET_FARVAR(seg, info->total_memory, bochsvga_total_mem());
+
+    SET_FARVAR(seg, info->oem_vendor_string,
+            SEGOFF(get_global_seg(), (u32)VBE_VENDOR_STRING));
+    SET_FARVAR(seg, info->oem_product_string,
+            SEGOFF(get_global_seg(), (u32)VBE_PRODUCT_STRING));
+    SET_FARVAR(seg, info->oem_revision_string,
+            SEGOFF(get_global_seg(), (u32)VBE_REVISION_STRING));
+
+    /* Fill list of modes */
+    bochsvga_list_modes(seg, regs->di + 32);
+
+    regs->al = regs->ah; /* 0x4F, Function supported */
+    regs->ah = 0x0; /* 0x0, Function call successful */
+}
+
+static void
+vbe_104f01(struct bregs *regs)
+{
+    u16 seg = regs->es;
+    struct vbe_mode_info *info = (void*)(regs->di+0);
+    u16 mode = regs->cx;
+    struct vbe_modeinfo modeinfo;
+    int rc;
+
+    dprintf(1, "VBE mode info request: %x\n", mode);
+
+    rc = bochsvga_mode_info(mode, &modeinfo);
+    if (rc) {
+        dprintf(1, "VBE mode %x not found\n", mode);
+        regs->ax = 0x100;
+        return;
+    }
+
+    u16 mode_attr = VBE_MODE_ATTRIBUTE_SUPPORTED |
+                    VBE_MODE_ATTRIBUTE_EXTENDED_INFORMATION_AVAILABLE |
+                    VBE_MODE_ATTRIBUTE_COLOR_MODE |
+                    VBE_MODE_ATTRIBUTE_GRAPHICS_MODE;
+    if (modeinfo.depth == 4)
+        mode_attr |= VBE_MODE_ATTRIBUTE_TTY_BIOS_SUPPORT;
+    else
+        mode_attr |= VBE_MODE_ATTRIBUTE_LINEAR_FRAME_BUFFER_MODE;
+    SET_FARVAR(seg, info->mode_attributes, mode_attr);
+    SET_FARVAR(seg, info->winA_attributes,
+               VBE_WINDOW_ATTRIBUTE_RELOCATABLE |
+               VBE_WINDOW_ATTRIBUTE_READABLE |
+               VBE_WINDOW_ATTRIBUTE_WRITEABLE);
+    SET_FARVAR(seg, info->winB_attributes, 0);
+    SET_FARVAR(seg, info->win_granularity, 64); /* Bank size 64K */
+    SET_FARVAR(seg, info->win_size, 64); /* Bank size 64K */
+    SET_FARVAR(seg, info->winA_seg, 0xA000);
+    SET_FARVAR(seg, info->winB_seg, 0x0);
+    SET_FARVAR(seg, info->win_func_ptr.segoff, 0x0);
+    SET_FARVAR(seg, info->bytes_per_scanline, modeinfo.linesize);
+    SET_FARVAR(seg, info->xres, modeinfo.width);
+    SET_FARVAR(seg, info->yres, modeinfo.height);
+    SET_FARVAR(seg, info->xcharsize, 8);
+    SET_FARVAR(seg, info->ycharsize, 16);
+    if (modeinfo.depth == 4)
+        SET_FARVAR(seg, info->planes, 4);
+    else
+        SET_FARVAR(seg, info->planes, 1);
+    SET_FARVAR(seg, info->bits_per_pixel, modeinfo.depth);
+    SET_FARVAR(seg, info->banks,
+            (modeinfo.linesize * modeinfo.height + 65535) / 65536);
+    if (modeinfo.depth == 4)
+        SET_FARVAR(seg, info->mem_model, VBE_MEMORYMODEL_PLANAR);
+    else if (modeinfo.depth == 8)
+        SET_FARVAR(seg, info->mem_model, VBE_MEMORYMODEL_PACKED_PIXEL);
+    else
+        SET_FARVAR(seg, info->mem_model, VBE_MEMORYMODEL_DIRECT_COLOR);
+    SET_FARVAR(seg, info->bank_size, 0);
+    u32 pages = modeinfo.vram_size / (modeinfo.height * modeinfo.linesize);
+    if (modeinfo.depth == 4)
+        SET_FARVAR(seg, info->pages, (pages / 4) - 1);
+    else
+        SET_FARVAR(seg, info->pages, pages - 1);
+    SET_FARVAR(seg, info->reserved0, 1);
+
+    u8 r_size, r_pos, g_size, g_pos, b_size, b_pos, a_size, a_pos;
+
+    switch (modeinfo.depth) {
+    case 15: r_size = 5; r_pos = 10; g_size = 5; g_pos = 5;
+             b_size = 5; b_pos = 0; a_size = 1; a_pos = 15; break;
+    case 16: r_size = 5; r_pos = 11; g_size = 6; g_pos = 5;
+             b_size = 5; b_pos = 0; a_size = 0; a_pos = 0; break;
+    case 24: r_size = 8; r_pos = 16; g_size = 8; g_pos = 8;
+             b_size = 8; b_pos = 0; a_size = 0; a_pos = 0; break;
+    case 32: r_size = 8; r_pos = 16; g_size = 8; g_pos = 8;
+             b_size = 8; b_pos = 0; a_size = 8; a_pos = 24; break;
+    default: r_size = 0; r_pos = 0; g_size = 0; g_pos = 0;
+             b_size = 0; b_pos = 0; a_size = 0; a_pos = 0; break;
+    }
+
+    SET_FARVAR(seg, info->red_size, r_size);
+    SET_FARVAR(seg, info->red_pos, r_pos);
+    SET_FARVAR(seg, info->green_size, g_size);
+    SET_FARVAR(seg, info->green_pos, g_pos);
+    SET_FARVAR(seg, info->blue_size, b_size);
+    SET_FARVAR(seg, info->blue_pos, b_pos);
+    SET_FARVAR(seg, info->alpha_size, a_size);
+    SET_FARVAR(seg, info->alpha_pos, a_pos);
+
+    if (modeinfo.depth == 32)
+        SET_FARVAR(seg, info->directcolor_info,
+                   VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE);
+    else
+        SET_FARVAR(seg, info->directcolor_info, 0);
+
+    if (modeinfo.depth > 4)
+        SET_FARVAR(seg, info->phys_base, modeinfo.phys_base);
+    else
+        SET_FARVAR(seg, info->phys_base, 0);
+
+    SET_FARVAR(seg, info->reserved1, 0);
+    SET_FARVAR(seg, info->reserved2, 0);
+    SET_FARVAR(seg, info->linear_bytes_per_scanline, modeinfo.linesize);
+    SET_FARVAR(seg, info->bank_pages, 0);
+    SET_FARVAR(seg, info->linear_pages, 0);
+    SET_FARVAR(seg, info->linear_red_size, r_size);
+    SET_FARVAR(seg, info->linear_red_pos, r_pos);
+    SET_FARVAR(seg, info->linear_green_size, g_size);
+    SET_FARVAR(seg, info->linear_green_pos, g_pos);
+    SET_FARVAR(seg, info->linear_blue_size, b_size);
+    SET_FARVAR(seg, info->linear_blue_pos, b_pos);
+    SET_FARVAR(seg, info->linear_alpha_size, a_size);
+    SET_FARVAR(seg, info->linear_alpha_pos, a_pos);
+    SET_FARVAR(seg, info->pixclock_max, 0);
+
+    regs->al = regs->ah; /* 0x4F, Function supported */
+    regs->ah = 0x0; /* 0x0, Function call successful */
+}
+
+static void
+vbe_104f02(struct bregs *regs)
+{
+    //u16 seg = regs->es;
+    //struct vbe_crtc_info *crtc_info = (void*)(regs->di+0);
+    u16 mode = regs->bx;
+    struct vbe_modeinfo modeinfo;
+    int rc;
+
+    dprintf(1, "VBE mode set: %x\n", mode);
+
+    if (mode < 0x100) { /* VGA */
+        dprintf(1, "set VGA mode %x\n", mode);
+
+        bochsvga_hires_enable(0);
+        vga_set_mode(mode, 0);
+    } else { /* VBE */
+        rc = bochsvga_mode_info(mode & 0x1ff, &modeinfo);
+        if (rc) {
+            dprintf(1, "VBE mode %x not found\n", mode & 0x1ff);
+            regs->ax = 0x100;
+            return;
+        }
+        bochsvga_hires_enable(1);
+        bochsvga_set_mode(mode & 0x1ff, &modeinfo);
+
+        if (mode & 0x4000) {
+            /* Linear frame buffer */
+            /* XXX: ??? */
+        }
+        if (!(mode & 0x8000)) {
+            bochsvga_clear_scr();
+        }
+    }
+
+    regs->al = regs->ah; /* 0x4F, Function supported */
+    regs->ah = 0x0; /* 0x0, Function call successful */
+}
+
+static void
+vbe_104f03(struct bregs *regs)
+{
+    if (!bochsvga_hires_enabled()) {
+        regs->bx = GET_BDA(video_mode);
+    } else {
+        regs->bx = bochsvga_curr_mode();
+    }
+
+    dprintf(1, "VBE current mode=%x\n", regs->bx);
+
+    regs->al = regs->ah; /* 0x4F, Function supported */
+    regs->ah = 0x0; /* 0x0, Function call successful */
+}
+
+static void
+vbe_104f04(struct bregs *regs)
+{
+    debug_stub(regs);
+    regs->ax = 0x0100;
+}
+
+static void
+vbe_104f05(struct bregs *regs)
+{
+    debug_stub(regs);
+    regs->ax = 0x0100;
+}
+
+static void
+vbe_104f06(struct bregs *regs)
+{
+    debug_stub(regs);
+    regs->ax = 0x0100;
+}
+
+static void
+vbe_104f07(struct bregs *regs)
+{
+    debug_stub(regs);
+    regs->ax = 0x0100;
+}
+
+static void
+vbe_104f08(struct bregs *regs)
+{
+    debug_stub(regs);
+    regs->ax = 0x0100;
+}
+
+static void
+vbe_104f0a(struct bregs *regs)
+{
+    debug_stub(regs);
+    regs->ax = 0x0100;
+}
+
+static void
+vbe_104fXX(struct bregs *regs)
+{
+    debug_stub(regs);
+    regs->ax = 0x0100;
+}
+
+void
+handle_104f(struct bregs *regs)
+{
+    if (!bochsvga_enabled()) {
+        vbe_104fXX(regs);
+        return;
+    }
+
+    switch (regs->al) {
+    case 0x00: vbe_104f00(regs); break;
+    case 0x01: vbe_104f01(regs); break;
+    case 0x02: vbe_104f02(regs); break;
+    case 0x03: vbe_104f03(regs); break;
+    case 0x04: vbe_104f04(regs); break;
+    case 0x05: vbe_104f05(regs); break;
+    case 0x06: vbe_104f06(regs); break;
+    case 0x07: vbe_104f07(regs); break;
+    case 0x08: vbe_104f08(regs); break;
+    case 0x0a: vbe_104f0a(regs); break;
+    default:   vbe_104fXX(regs); break;
+    }
+}
diff --git a/vgasrc/vgabios.c b/vgasrc/vgabios.c
index 2ff677e..f1b84f9 100644
--- a/vgasrc/vgabios.c
+++ b/vgasrc/vgabios.c
@@ -17,7 +17,6 @@
 #include "vgabios.h" // find_vga_entry
 #include "optionroms.h" // struct pci_data
 #include "config.h" // CONFIG_*
-#include "vbe.h" // struct vbe_info
 #include "geodelx.h" // geodelx_init
 #include "bochsvga.h" // bochsvga_init
 
@@ -1206,294 +1205,6 @@ handle_101c(struct bregs *regs)
 }
 
 static void
-handle_104f00(struct bregs *regs)
-{
-    u16 seg = regs->es;
-    struct vbe_info *info = (void*)(regs->di+0);
-
-    if (GET_FARVAR(seg, info->signature) == VBE2_SIGNATURE) {
-        dprintf(4, "Get VBE Controller: VBE2 Signature found\n");
-    } else if (GET_FARVAR(seg, info->signature) == VESA_SIGNATURE) {
-        dprintf(4, "Get VBE Controller: VESA Signature found\n");
-    } else {
-        dprintf(4, "Get VBE Controller: Invalid Signature\n");
-    }
-
-    memset_far(seg, info, 0, sizeof(*info));
-
-    SET_FARVAR(seg, info->signature, VESA_SIGNATURE);
-
-    SET_FARVAR(seg, info->version, 0x0200);
-
-    SET_FARVAR(seg, info->oem_string,
-            SEGOFF(get_global_seg(), (u32)VBE_OEM_STRING));
-    SET_FARVAR(seg, info->capabilities, 0x1); /* 8BIT DAC */
-
-    /* We generate our mode list in the reserved field of the info block */
-    SET_FARVAR(seg, info->video_mode, SEGOFF(seg, regs->di + 34));
-
-    /* Total memory (in 64 blocks) */
-    SET_FARVAR(seg, info->total_memory, bochsvga_total_mem());
-
-    SET_FARVAR(seg, info->oem_vendor_string,
-            SEGOFF(get_global_seg(), (u32)VBE_VENDOR_STRING));
-    SET_FARVAR(seg, info->oem_product_string,
-            SEGOFF(get_global_seg(), (u32)VBE_PRODUCT_STRING));
-    SET_FARVAR(seg, info->oem_revision_string,
-            SEGOFF(get_global_seg(), (u32)VBE_REVISION_STRING));
-
-    /* Fill list of modes */
-    bochsvga_list_modes(seg, regs->di + 32);
-
-    regs->al = regs->ah; /* 0x4F, Function supported */
-    regs->ah = 0x0; /* 0x0, Function call successful */
-}
-
-static void
-handle_104f01(struct bregs *regs)
-{
-    u16 seg = regs->es;
-    struct vbe_mode_info *info = (void*)(regs->di+0);
-    u16 mode = regs->cx;
-    struct vbe_modeinfo modeinfo;
-    int rc;
-
-    dprintf(1, "VBE mode info request: %x\n", mode);
-
-    rc = bochsvga_mode_info(mode, &modeinfo);
-    if (rc) {
-        dprintf(1, "VBE mode %x not found\n", mode);
-        regs->ax = 0x100;
-        return;
-    }
-
-    u16 mode_attr = VBE_MODE_ATTRIBUTE_SUPPORTED |
-                    VBE_MODE_ATTRIBUTE_EXTENDED_INFORMATION_AVAILABLE |
-                    VBE_MODE_ATTRIBUTE_COLOR_MODE |
-                    VBE_MODE_ATTRIBUTE_GRAPHICS_MODE;
-    if (modeinfo.depth == 4)
-        mode_attr |= VBE_MODE_ATTRIBUTE_TTY_BIOS_SUPPORT;
-    else
-        mode_attr |= VBE_MODE_ATTRIBUTE_LINEAR_FRAME_BUFFER_MODE;
-    SET_FARVAR(seg, info->mode_attributes, mode_attr);
-    SET_FARVAR(seg, info->winA_attributes,
-               VBE_WINDOW_ATTRIBUTE_RELOCATABLE |
-               VBE_WINDOW_ATTRIBUTE_READABLE |
-               VBE_WINDOW_ATTRIBUTE_WRITEABLE);
-    SET_FARVAR(seg, info->winB_attributes, 0);
-    SET_FARVAR(seg, info->win_granularity, 64); /* Bank size 64K */
-    SET_FARVAR(seg, info->win_size, 64); /* Bank size 64K */
-    SET_FARVAR(seg, info->winA_seg, 0xA000);
-    SET_FARVAR(seg, info->winB_seg, 0x0);
-    SET_FARVAR(seg, info->win_func_ptr.segoff, 0x0);
-    SET_FARVAR(seg, info->bytes_per_scanline, modeinfo.linesize);
-    SET_FARVAR(seg, info->xres, modeinfo.width);
-    SET_FARVAR(seg, info->yres, modeinfo.height);
-    SET_FARVAR(seg, info->xcharsize, 8);
-    SET_FARVAR(seg, info->ycharsize, 16);
-    if (modeinfo.depth == 4)
-        SET_FARVAR(seg, info->planes, 4);
-    else
-        SET_FARVAR(seg, info->planes, 1);
-    SET_FARVAR(seg, info->bits_per_pixel, modeinfo.depth);
-    SET_FARVAR(seg, info->banks,
-            (modeinfo.linesize * modeinfo.height + 65535) / 65536);
-    if (modeinfo.depth == 4)
-        SET_FARVAR(seg, info->mem_model, VBE_MEMORYMODEL_PLANAR);
-    else if (modeinfo.depth == 8)
-        SET_FARVAR(seg, info->mem_model, VBE_MEMORYMODEL_PACKED_PIXEL);
-    else
-        SET_FARVAR(seg, info->mem_model, VBE_MEMORYMODEL_DIRECT_COLOR);
-    SET_FARVAR(seg, info->bank_size, 0);
-    u32 pages = modeinfo.vram_size / (modeinfo.height * modeinfo.linesize);
-    if (modeinfo.depth == 4)
-        SET_FARVAR(seg, info->pages, (pages / 4) - 1);
-    else
-        SET_FARVAR(seg, info->pages, pages - 1);
-    SET_FARVAR(seg, info->reserved0, 1);
-
-    u8 r_size, r_pos, g_size, g_pos, b_size, b_pos, a_size, a_pos;
-
-    switch (modeinfo.depth) {
-    case 15: r_size = 5; r_pos = 10; g_size = 5; g_pos = 5;
-             b_size = 5; b_pos = 0; a_size = 1; a_pos = 15; break;
-    case 16: r_size = 5; r_pos = 11; g_size = 6; g_pos = 5;
-             b_size = 5; b_pos = 0; a_size = 0; a_pos = 0; break;
-    case 24: r_size = 8; r_pos = 16; g_size = 8; g_pos = 8;
-             b_size = 8; b_pos = 0; a_size = 0; a_pos = 0; break;
-    case 32: r_size = 8; r_pos = 16; g_size = 8; g_pos = 8;
-             b_size = 8; b_pos = 0; a_size = 8; a_pos = 24; break;
-    default: r_size = 0; r_pos = 0; g_size = 0; g_pos = 0;
-             b_size = 0; b_pos = 0; a_size = 0; a_pos = 0; break;
-    }
-
-    SET_FARVAR(seg, info->red_size, r_size);
-    SET_FARVAR(seg, info->red_pos, r_pos);
-    SET_FARVAR(seg, info->green_size, g_size);
-    SET_FARVAR(seg, info->green_pos, g_pos);
-    SET_FARVAR(seg, info->blue_size, b_size);
-    SET_FARVAR(seg, info->blue_pos, b_pos);
-    SET_FARVAR(seg, info->alpha_size, a_size);
-    SET_FARVAR(seg, info->alpha_pos, a_pos);
-
-    if (modeinfo.depth == 32)
-        SET_FARVAR(seg, info->directcolor_info,
-                   VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE);
-    else
-        SET_FARVAR(seg, info->directcolor_info, 0);
-
-    if (modeinfo.depth > 4)
-        SET_FARVAR(seg, info->phys_base, modeinfo.phys_base);
-    else
-        SET_FARVAR(seg, info->phys_base, 0);
-
-    SET_FARVAR(seg, info->reserved1, 0);
-    SET_FARVAR(seg, info->reserved2, 0);
-    SET_FARVAR(seg, info->linear_bytes_per_scanline, modeinfo.linesize);
-    SET_FARVAR(seg, info->bank_pages, 0);
-    SET_FARVAR(seg, info->linear_pages, 0);
-    SET_FARVAR(seg, info->linear_red_size, r_size);
-    SET_FARVAR(seg, info->linear_red_pos, r_pos);
-    SET_FARVAR(seg, info->linear_green_size, g_size);
-    SET_FARVAR(seg, info->linear_green_pos, g_pos);
-    SET_FARVAR(seg, info->linear_blue_size, b_size);
-    SET_FARVAR(seg, info->linear_blue_pos, b_pos);
-    SET_FARVAR(seg, info->linear_alpha_size, a_size);
-    SET_FARVAR(seg, info->linear_alpha_pos, a_pos);
-    SET_FARVAR(seg, info->pixclock_max, 0);
-
-    regs->al = regs->ah; /* 0x4F, Function supported */
-    regs->ah = 0x0; /* 0x0, Function call successful */
-}
-
-static void
-handle_104f02(struct bregs *regs)
-{
-    //u16 seg = regs->es;
-    //struct vbe_crtc_info *crtc_info = (void*)(regs->di+0);
-    u16 mode = regs->bx;
-    struct vbe_modeinfo modeinfo;
-    int rc;
-
-    dprintf(1, "VBE mode set: %x\n", mode);
-
-    if (mode < 0x100) { /* VGA */
-        dprintf(1, "set VGA mode %x\n", mode);
-
-        bochsvga_hires_enable(0);
-        vga_set_mode(mode, 0);
-    } else { /* VBE */
-        rc = bochsvga_mode_info(mode & 0x1ff, &modeinfo);
-        if (rc) {
-            dprintf(1, "VBE mode %x not found\n", mode & 0x1ff);
-            regs->ax = 0x100;
-            return;
-        }
-        bochsvga_hires_enable(1);
-        bochsvga_set_mode(mode & 0x1ff, &modeinfo);
-
-        if (mode & 0x4000) {
-            /* Linear frame buffer */
-            /* XXX: ??? */
-        }
-        if (!(mode & 0x8000)) {
-            bochsvga_clear_scr();
-        }
-    }
-
-    regs->al = regs->ah; /* 0x4F, Function supported */
-    regs->ah = 0x0; /* 0x0, Function call successful */
-}
-
-static void
-handle_104f03(struct bregs *regs)
-{
-    if (!bochsvga_hires_enabled()) {
-        regs->bx = GET_BDA(video_mode);
-    } else {
-        regs->bx = bochsvga_curr_mode();
-    }
-
-    dprintf(1, "VBE current mode=%x\n", regs->bx);
-
-    regs->al = regs->ah; /* 0x4F, Function supported */
-    regs->ah = 0x0; /* 0x0, Function call successful */
-}
-
-static void
-handle_104f04(struct bregs *regs)
-{
-    debug_enter(regs, DEBUG_VGA_10);
-    regs->ax = 0x0100;
-}
-
-static void
-handle_104f05(struct bregs *regs)
-{
-    debug_enter(regs, DEBUG_VGA_10);
-    regs->ax = 0x0100;
-}
-
-static void
-handle_104f06(struct bregs *regs)
-{
-    debug_enter(regs, DEBUG_VGA_10);
-    regs->ax = 0x0100;
-}
-
-static void
-handle_104f07(struct bregs *regs)
-{
-    debug_enter(regs, DEBUG_VGA_10);
-    regs->ax = 0x0100;
-}
-
-static void
-handle_104f08(struct bregs *regs)
-{
-    debug_enter(regs, DEBUG_VGA_10);
-    regs->ax = 0x0100;
-}
-
-static void
-handle_104f0a(struct bregs *regs)
-{
-    debug_enter(regs, DEBUG_VGA_10);
-    regs->ax = 0x0100;
-}
-
-static void
-handle_104fXX(struct bregs *regs)
-{
-    debug_stub(regs);
-    regs->ax = 0x0100;
-}
-
-static void
-handle_104f(struct bregs *regs)
-{
-    if (!bochsvga_enabled()) {
-        handle_104fXX(regs);
-        return;
-    }
-
-    switch (regs->al) {
-    case 0x00: handle_104f00(regs); break;
-    case 0x01: handle_104f01(regs); break;
-    case 0x02: handle_104f02(regs); break;
-    case 0x03: handle_104f03(regs); break;
-    case 0x04: handle_104f04(regs); break;
-    case 0x05: handle_104f05(regs); break;
-    case 0x06: handle_104f06(regs); break;
-    case 0x07: handle_104f07(regs); break;
-    case 0x08: handle_104f08(regs); break;
-    case 0x0a: handle_104f0a(regs); break;
-    default:   handle_104fXX(regs); break;
-    }
-}
-
-
-static void
 handle_10XX(struct bregs *regs)
 {
     debug_stub(regs);
diff --git a/vgasrc/vgabios.h b/vgasrc/vgabios.h
index 913dd88..568e276 100644
--- a/vgasrc/vgabios.h
+++ b/vgasrc/vgabios.h
@@ -222,4 +222,7 @@ struct vbe_modeinfo
     u32 vram_size;
 };
 
+struct bregs;
+void handle_104f(struct bregs *regs);
+
 #endif // vgabios.h