freeze dos progress, maybe some day

Player/Main/dos.s

@@ -1,47 +1,18 @@
 .section .data
     .align 4
+# TODO: Make sure it's placed under 1 MiB.
 # The DPMI Register Structure (50 bytes total)
 # This holds the register states injected into Real Mode.
-dpmi_regs:
-    .long 0         # edi  (offset 0)
-    .long 0         # esi  (offset 4)
-    .long 0         # ebp  (offset 8)
-    .long 0         # esp / reserved (offset 12)
-    .long 0         # ebx  (offset 16)
-    .long 0         # edx  (offset 20)
-    .long 0         # ecx  (offset 24)
-dpmi_eax:
-    .long 0         # eax  (offset 28)
-    .short 0        # flags(offset 32)
-    .short 0        # es   (offset 34)
-    .short 0        # ds   (offset 36)
-    .short 0        # fs   (offset 38)
-    .short 0        # gs   (offset 40)
-    .short 0        # ip   (offset 42)
-    .short 0        # cs   (offset 44)
-    .short 0        # sp   (offset 46)
-    .short 0        # ss   (offset 48)
 
 .section .text
 .global _start
 
 _start:
+    push %ebp
+    mov %esp, %ebp
+    cld
+
     call plr_display_dos_main
 
-    # 1. Set up the Real-Mode registers inside the DPMI structure
-    # AH = 4Ch (DOS Exit Function), AL = 00h (Return Code 0)
-    movl $0x00004C00, dpmi_eax
-
-    # 2. Call DPMI Simulate Real Mode Interrupt
-    movw $0x0300, %ax    # DPMI Function: Simulate Real Mode Interrupt
-    movb $0x21, %bl      # Interrupt number to trigger (INT 21h)
-    movb $0x00, %bh      # Flags (Must be 0)
-    movw $0x0000, %cx    # Number of words to copy to RM stack (0)
-    
-    # ES:EDI points to our DPMI register block. 
-    # In WDOSX flat model, %es already targets the flat data descriptor.
-    movl $dpmi_regs, %edi
-    
-    int $0x31            # Trigger DPMI host to execute the RM interrupt
-
-    # --- Execution halts here as DOS terminates the program ---
+    movb $0x4C, %ah
+    int $0x21