From 403203cd6fb02e2014dbb8da72803cfa3df51ec4 Mon Sep 17 00:00:00 2001
From: Cacodemon345 <wahil1976@outlook.com>
Date: Fri, 26 Apr 2024 18:50:06 +0600
Subject: [PATCH] More necessary changes

---
 src/include/86box/video.h |  3 +++
 src/video/vid_bochs_vbe.c | 17 ++++++++++++++++-
 src/video/vid_table.c     |  1 +
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/include/86box/video.h b/src/include/86box/video.h
index bf36bf7de0..18055eb962 100644
--- a/src/include/86box/video.h
+++ b/src/include/86box/video.h
@@ -583,6 +583,9 @@ extern const device_t wy700_device;
 extern const device_t chips_69000_device;
 extern const device_t chips_69000_onboard_device;
 
+/* Bochs */
+extern const device_t bochs_svga_device;
+
 #endif
 
 #endif /*EMU_VIDEO_H*/
diff --git a/src/video/vid_bochs_vbe.c b/src/video/vid_bochs_vbe.c
index e25ab71e57..b60c74791f 100644
--- a/src/video/vid_bochs_vbe.c
+++ b/src/video/vid_bochs_vbe.c
@@ -239,6 +239,21 @@ bochs_vbe_outw(uint16_t addr, uint16_t val, void *priv)
                 svga_recalctimings(&bochs_vbe->svga);
                 break;
 
+            case VBE_DISPI_INDEX_BANK: 
+            {
+                uint16_t rw_mode = VBE_DISPI_BANK_RW; // compatibility mode
+                if ((val & VBE_DISPI_BANK_RW) != 0) {
+                    rw_mode = (val & VBE_DISPI_BANK_RW);
+                }
+                if (val & VBE_DISPI_BANK_RD) {
+                    bochs_vbe->svga.read_bank = (val & 0x1ff) * (bochs_vbe->bank_gran << 10);
+                }
+                if (val & VBE_DISPI_BANK_WR) {
+                    bochs_vbe->svga.write_bank = (val & 0x1ff) * (bochs_vbe->bank_gran << 10);
+                }
+                break;
+            }
+
             case VBE_DISPI_INDEX_ENABLE: {
                 uint32_t new_bank_gran = 64;
                 if ((val & VBE_DISPI_ENABLED) && !(bochs_vbe->vbe_regs[VBE_DISPI_ENABLED] & VBE_DISPI_ENABLED)) {
@@ -413,7 +428,7 @@ bochs_vbe_force_redraw(void *priv)
     bochs_vbe->svga.fullchange = changeframecount;
 }
 
-const device_t vga_device = {
+const device_t bochs_svga_device = {
     .name          = "Bochs SVGA",
     .internal_name = "bochs_svga",
     .flags         = DEVICE_PCI,
diff --git a/src/video/vid_table.c b/src/video/vid_table.c
index e526216c3e..6d1aabca44 100644
--- a/src/video/vid_table.c
+++ b/src/video/vid_table.c
@@ -271,6 +271,7 @@ video_cards[] = {
     { &compaq_voodoo_3_3500_agp_device                 },
     { &voodoo_3_3500_se_agp_device                     },
     { &voodoo_3_3500_si_agp_device                     },
+    { &bochs_svga_device                               },
     { NULL                                             }
   // clang-format on
 };