--- a/src/xiaomao.c
+++ b/src/xiaomao.c
@@ -6,6 +6,8 @@
  * Additional terms under GPLv3 section 7(b): the author attribution "HelloSun" and this copyright
  * notice must be preserved in all copies and modified versions, including the notice the program
  * displays when it starts. See LICENSE.
+ * MODIFIED VERSION: adapted to the v86 emulator by the DOS LLM project (see xiaomao-v86.patch): the shadow
+ * text buffer is at A800:0000 instead of B800:0000. Original work: HelloSun, Copyright (C) 2026 HelloSun, first version 1.0 (2026-10-25).
  *
  * Design (the classic "Chinese system" approach):
  *   The text screen is kept as an ordinary 80x25 text-mode shadow in memory at
@@ -42,6 +44,9 @@
 
 #define COLS 80
 #define ROWS 25
+/* v86 patch: v86's VGA planes are exactly 64 KB and do not wrap the 128 KB aperture the way DOSBox does,
+ * so the shadow text lives at A800:0000 (plane offset 8000h, inside a 64 KB A0000 window, GC6=05h) instead of B800. */
+#define SHADOW_SEG 0xA800u
 #define GFX_BASE 0x0000u
 #define PAINT_OFF 0x6000u    /* painted copy (ch/attr) in the shadow window */
 #define KIND_OFF 0x7000u     /* painted kinds                                */
@@ -92,7 +97,7 @@
 
 #define BDA8(o) (*(u8 far *)MK_FP(0x40, (o)))
 #define BDA16(o) (*(u16 far *)MK_FP(0x40, (o)))
-#define SHADOW ((u16 far *)MK_FP(0xB800, 0))
+#define SHADOW ((u16 far *)MK_FP(SHADOW_SEG, 0))
 
 /* ---- VGA helpers ---- */
 static void gcw(unsigned i, unsigned v) { outp(0x3CE, i); outp(0x3CF, v); }
@@ -165,8 +170,8 @@
     int cvis, cur_on, dirty_any;
     u16 cur[COLS], old[COLS];
     u8 kd[COLS], ok[COLS], dr[COLS];
-    u16 far *pt = (u16 far *)MK_FP(0xB800, PAINT_OFF);
-    u8 far *pk = (u8 far *)MK_FP(0xB800, KIND_OFF);
+    u16 far *pt = (u16 far *)MK_FP(SHADOW_SEG, PAINT_OFF);
+    u8 far *pk = (u8 far *)MK_FP(SHADOW_SEG, KIND_OFF);
     if (!text_active) return;
     if (!force && tick == last_tick) return;
     last_tick = tick;
@@ -288,8 +293,8 @@
         crtc(0x11, p);
     }
     outp(0x3C4, 2); outp(0x3C5, 0x0F);            /* map mask: all planes */
-    gcw(0, 0); gcw(1, 0); gcw(3, 0); gcw(4, 0); gcw(5, 0); gcw(6, 0x01); gcw(8, 0xFF);   /* 128K aperture: A000 = picture, B800 = shadow */
-    for (i = 0; i < COLS * ROWS; i++) { ((u16 far *)MK_FP(0xB800, PAINT_OFF))[i] = 0xFFFF; ((u8 far *)MK_FP(0xB800, KIND_OFF))[i] = 0xFF; }
+    gcw(0, 0); gcw(1, 0); gcw(3, 0); gcw(4, 0); gcw(5, 0); gcw(6, 0x05); gcw(8, 0xFF);   /* 64K aperture at A0000: A000 = picture (0000-7CFF), A800 = shadow (8000-FFFF) */
+    for (i = 0; i < COLS * ROWS; i++) { ((u16 far *)MK_FP(SHADOW_SEG, PAINT_OFF))[i] = 0xFFFF; ((u8 far *)MK_FP(SHADOW_SEG, KIND_OFF))[i] = 0xFF; }
     BDA8(0x49) = 3; BDA16(0x4A) = COLS; BDA16(0x4C) = 0x1000; BDA16(0x4E) = 0;
     BDA8(0x84) = ROWS - 1; BDA8(0x85) = 16; BDA16(0x60) = 0x0D0E;
     BDA16(0x10) = (BDA16(0x10) & ~0x30u) | 0x20;
@@ -715,7 +720,7 @@
     xms_ok = 1;
     save_vectors();
     rom16 = (u8 far *)get_rom_font();
-    for (i = 0; i < COLS * ROWS; i++) saved[i] = ((u16 far *)MK_FP(0xB800, 0))[i];
+    for (i = 0; i < COLS * ROWS; i++) saved[i] = ((u16 far *)MK_FP(0xB800, 0))[i];   /* the REAL text screen before we switch to graphics */
     crow = BDA8(0x51); ccol = BDA8(0x50);
     enter_text();
     for (i = 0; i < COLS * ROWS; i++) SHADOW[i] = (saved[i] & 0xF000) ? (u16)((saved[i] & 0xFF) | 0x0700) : saved[i];