Get rid of pre-tables for interrupts and kprintf

kernel/main.asm

@@ -5,13 +5,6 @@ optrom_length:
   db 0x00
   jmp optrom_init
 
-str_vendor:
-  db "Nero", 0
-
-align 16
-str_product:
-  db "Nero DOS", 0
-
 times (0x1A - ($-$$)) db 0
   dw pnp
 
@@ -36,13 +29,13 @@ pnp:
 
 align 16
 optrom_init:
-  xor ax, ax
-  mov es, ax
-  mov di, 0x0060 ; vector (0x18 * 4 bytes)
-  mov ax, start
-  stosw
-  mov ax, cs
-  stosw
+  ; setup data stack below code stack
+  mov bp, sp
+  sub bp, 0x80
+  ; intnum and offset to data stack
+  mov word [ss:bp], 0x18
+  mov word [ss:bp+2], start
+  call intr_register
   retf
 
 putc:
@@ -57,6 +50,8 @@ putc:
 
 announce:
   push cs
+  mov ax, cs
+  mov ds, ax
   mov ax, str_product
   push ax
   call printf
@@ -65,42 +60,26 @@ announce:
   ret
 
 start:
-  mov ax, cs
+  xor ax, ax
   mov ds, ax
+  mov es, ax
+  ; setup code + data stack
+  mov ss, ax
+  mov sp, ax
+  mov bp, sp
+  ; data stack starts 512 bytes below code stack
+  sub bp, 0x200
 
   call announce
 
-  ; clear memory until 0x01000
-  xor ax, ax
-  mov es, ax
-  mov di, 0x500
-  mov cx, 0xB00
-  rep stosb
+  sub bp, 4
+  mov word [ss:bp], 3
+  mov word [ss:bp+2], isr_debug
+  call intr_register
 
-  call intr_init
   sti
 
-  sub sp, 0x10
-  mov si, sp
-  mov word [ss:si+0x00], 0
-  mov word [ss:si+0x02], 1
-  mov word [ss:si+0x04], 0
-  mov word [ss:si+0x06], 0x2000
-  mov word [ss:si+0x08], 0x07fc
-  mov word [ss:si+0x0A], 0
-  mov word [ss:si+0x0C], 0
-  mov word [ss:si+0x0E], 0
-  mov ah, 0x42
-
-  push ss
-  pop ds
-  call ramdisk_io
-  push ax
-  call printf
-  db "AX=%X", 0x0A, 0x0D, 0x00
-  pop ax
-
-  add sp, 0x10
+  int 3
 
 .halt:
   hlt
@@ -111,9 +90,5 @@ start:
 
 %include "intr.asm"
 %include "debug.asm"
-%include "kprintf.asm"
-%include "dosapi.asm"
-
-_reloc_end:
 
 align 512