From d879df630f68bb56f291ac285f951ca2ba6764e7 Mon Sep 17 00:00:00 2001
From: andromeda <andromeda@lenovo>
Date: Tue, 3 Mar 2026 18:18:57 +0100
Subject: reorganise

---
 boot.asm | 158 ---------------------------------------------------------------
 1 file changed, 158 deletions(-)
 delete mode 100644 boot.asm

(limited to 'boot.asm')

diff --git a/boot.asm b/boot.asm
deleted file mode 100644
index bb852ef..0000000
--- a/boot.asm
+++ /dev/null
@@ -1,158 +0,0 @@
-; bootler
-; legacy bootloader in nasm-flavoured asm
-; 2026 Andromeda
-; GPL licensed
-
-[bits 16]
-[org 0x7C00] ; address where bootloader is loaded
-
-xor ax, ax
-mov ds, ax
-mov es, ax
-mov ss, ax
-mov sp, 0x7C00
-
-mov ah, 0x0E
-mov al, 'R'
-int 0x10
-mov al, 'e'
-int 0x10
-mov al, 'a'
-int 0x10
-mov al, 'l'
-int 0x10
-mov al, 0x0D
-int 0x10
-mov al, 0x0A
-int 0x10
-mov al, 0x00 ; stops serial and bios output from overlapping in qemu -nographic
-int 0x10     ; output
-
-; activate a20
-mov ax, 0x2401
-int 0x15
-jc error
-
-; load kernel
-; 'docs' from https://www.ctyme.com/intr/rb-0607.htm
-mov ah, 0x02
-mov al, 1 ; number of sectors to read (must be nonzero)
-mov ch, 0 ; low eight bits of cylinder number
-mov cl, 2 ; sector number 1-63 (bits 0-5); high two bits of cylinder (bits 6-7,
-          ; hard disk only)
-mov dh, 0 ; head number
-; dl is already set by bios
-mov bx, 0x1000 ; data buffer
-mov es, bx
-xor bx, bx
-int 0x13 ; read disk
-jc error
-
-; load gdt
-lgdt [gdt_descriptor]
-
-; jump to pm
-cli
-mov eax, cr0
-or eax, 1
-mov cr0, eax
-jmp 0x08:pm_start
-
-error:
-  mov al, 'e'
-  int 0x10
-  mov al, 'r'
-  int 0x10
-  mov al, 'r'
-  int 0x10
-  mov al, 'o'
-  int 0x10
-  mov al, 'r'
-  int 0x10
-  jmp $
-
-gdt_data:
-  ; null segment
-  dq 0x0000000000000000
-  ; code segment
-  dw 0xFFFF
-  dw 0x0000
-
-  db 0x00
-  db 10011010b ; 32-bit code segment, present, ring 0
-  db 11001111b ; limit bits 16-19
-  db 0x00
-
-  ; data segment
-  dw 0xFFFF
-  dw 0x0000
-
-  db 0x00
-  db 10010010b ; 32-bit data segment, present, ring 0
-  db 11001111b ; limit bits 16-19
-  db 0x00
-
-gdt_descriptor:
-  dw $ - gdt_data - 1 ; size
-  dd gdt_data         ; start
-
-[bits 32]
-
-; entry point
-pm_start:
-  ; data segment registers
-  mov ax, 0x10
-  mov ds, ax
-  mov es, ax
-  mov fs, ax
-  mov gs, ax
-  mov ss, ax
-  mov esp, 0x80000
-
-  ; TODO actually configure COM1
-  mov dx, 0x3F8 ; COM1
-  mov al, 'P'
-  out dx, al
-  mov al, 'r'
-  out dx, al
-  mov al, 'o'
-  out dx, al
-  mov al, 't'
-  out dx, al
-  mov al, 'e'
-  out dx, al
-  mov al, 'c'
-  out dx, al
-  mov al, 't'
-  out dx, al
-  mov al, 'e'
-  out dx, al
-  mov al, 'd'
-  out dx, al
-  mov al, 0x0D
-  out dx, al
-  mov al, 0x0A
-  out dx, al
-
-  jmp 0x08:0x10000
-
-pm_error:
-  mov al, 'p'
-  out dx, al
-  mov al, 'm'
-  out dx, al
-  mov al, 'e'
-  out dx, al
-  mov al, 'r'
-  out dx, al
-  mov al, 'r'
-  out dx, al
-  mov al, 'o'
-  out dx, al
-  mov al, 'r'
-  out dx, al
-  jmp $
-  
-times 510-($-$$) db 0 ; 2 bytes less now
-db 0x55
-db 0xAA
-- 
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