Split up kernel and debug rom

kernel/main.asm

@@ -1,15 +1,29 @@
 cpu 8086
 org 0x0000
+rom:
   db 0x55, 0xAA
-optrom_length:
+.sectors:
   db 0x00
-  jmp optrom_init
+.init:
+  push cs
+  pop es
 
-; reserved area
-times (0x1A - ($-$$)) db 0
+  mov di, start
+  mov ax, 0x18
+  call intr_register
+
+  retf
+.name:
+  db "ROM DOS", 0
+
+  times (0x18 - ($-$$)) db 0
+.pcir_ptr:
+  dw 0
+
+  times (0x1A - ($-$$)) db 0
+.pnp_ptr:
   dw pnp
 
-align 16
 pnp:
   db "$PnP"
 .version:
@@ -21,8 +35,8 @@ pnp:
 .checksum:
   db 0 ; checksum (filled by fix-rom)
   dd 0 ; device identifier
-  dw str_vendor ; manufacturer string
-  dw str_product ; product name string
+  dw 0 ; manufacturer string
+  dw rom.name ; product name string
   db 0,0,0 ; device type string
   db 0x20 ; device indicator, bit for "read cacheable" set
   dw 0 ; boot connection vector
@@ -31,40 +45,6 @@ pnp:
   dw 0 ; reserved
   dw 0
 
-str_vendor:
-  db "Nero", 0
-str_product:
-  db "Nero DOS ", 60, 234, 62, 0
-
-optrom_init:
-  push cs
-  pop es
-
-  mov di, isr_debug
-  mov ax, 0x1
-  call intr_register
-  mov ax, 0x3
-  call intr_register
-
-  mov di, start
-  mov ax, 0x18
-  call intr_register
-
-  retf
-
-announce:
-  push ds
-  push cs
-  push cs
-  pop ds
-  mov ax, str_product
-  push ax
-  call printf
-  db "%S (CS=%Xh)", 0x0A, 0x0D, 0x00
-  add sp, 4
-  pop ds
-  ret
-
 start:
   xor ax, ax
   mov ds, ax
@@ -73,8 +53,6 @@ start:
   mov sp, 0x800
   mov di, sp
 
-  call announce
-
   call drvtab_create
 
   push cs
@@ -86,6 +64,7 @@ start:
 .loop:
   mov ah, 0x01
   int 0x21
+  int3
   jmp .loop
 
   cli
@@ -112,9 +91,4 @@ isr_return:
 
 %include "chario.asm"
 
-%include "printf.inc"
-%include "print.asm"
-
-%include "debug.asm"
-
 align 512