From 7ff724fe8f709440da9c730fdb8dcbaa4f989ed5 Mon Sep 17 00:00:00 2001
From: Benji Dial <Benji3.141@gmail.com>
Date: Thu, 13 Aug 2020 23:59:14 -0400
Subject: FAT16 directory enumeration, making many functions static, new 'log'
 functions to wrap vga and serial

---
 src/boot.asm | 28 ++++------------------------
 1 file changed, 4 insertions(+), 24 deletions(-)

(limited to 'src/boot.asm')

diff --git a/src/boot.asm b/src/boot.asm
index eb3b2c9..c74145c 100644
--- a/src/boot.asm
+++ b/src/boot.asm
@@ -5,13 +5,12 @@ kernel_sectors equ 64
 kernel_segment equ 0x3000
 
 support_flags equ 0x4000
-pci_hw_char equ 0x4001
-pci_ver equ 0x4002
+pci_hw_char   equ 0x4001
+pci_ver       equ 0x4002
+last_pci_bus  equ 0x4004
 
 pci_support equ 0x80
 
-vesa_segment equ 0x0420
-
   in al, 0x92
   or al, 0x02
   out 0x92, al
@@ -44,19 +43,9 @@ vesa_segment equ 0x0420
   mov byte [support_flags], pci_support
   mov byte [pci_hw_char], al
   mov word [pci_ver], bx
+  mov byte [last_pci_bus], cl
 
 no_pci:
-  mov dword [vesa_segment * 16], 'V' + 'B' * 256 + 'E' * 65535 + '2' * 16777216
-
-  mov ax, vesa_segment
-  mov es, ax
-  xor di, di
-  mov ax, 0x4f00
-  int 0x10
-
-  cmp ax, 0x004f
-  jne no_vbe
-
   cli
 
   lgdt [gdt]
@@ -67,15 +56,6 @@ no_pci:
 
   jmp 0x08:pmode
 
-no_vbe:
-  ;TODO
-
-  cli
-
-real_halt:
-  hlt
-  jmp real_halt
-
 bits 32
 
 pmode:
-- 
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