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https://github.com/Tom-on64/kern.git
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Tom-on
9c96636436
- Pretty much rewrote stage1.asm - Changed some addresses in stage2.asm and in memory/adresses.h - Changed stage3.c to read root INode and it's dirEntries to find kernel.bin and term16n.fnt - Made a fake ls command in kernel.c, just so it prints something - Fixed makedisk.c to make the disk image properly - Changed Makefile to compile makedisk.c and then run makedisk - Added makedisk executable to .gitignore
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
#ifndef ADDRESSES_H
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#define ADDRESSES_H
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/*
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* Memory layout of addresses 0x0000 - 0x12000
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* 0x0000-0x0fff - Probably shouldn't mess with this? idk it feels wrong
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* 0x1000-0x17ff - Free
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* 0x1800-0x1fff - Global Variables
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* 0x2000-0x2fff - Larger structs
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* 0x3000-0x3fff - Free
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* 0x4000-0x4fff - Font area
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* 0x6000-0x6fff - VBE info area
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* 0x7000-0x7bff - SMAP Area
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* 0x7c00-0x8bff - Bootblock
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* 0x8c00-0x9bff - Superblock (i think)
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* 0x9c00-0xafff - Free
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* 0xb000-0xbfff - Bootloader first INode
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*/
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// Global Variables 0x1800-0x1fff
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#define SLEEP_TIMER 0x1800
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#define CURRENT_PAGE_DIR_ADDR 0x1804
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#define PHYS_MEM_MAX_BLOCKS 0x1808
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#define PHYS_MEM_USED_BLOCKS 0x180C
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// Some structs 0x2000-0x2fff
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#define TERMINAL_INFO_LOC 0x2000
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#define KEYBOARD_STATE_LOC 0x2100
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#define DATETIME_LOC 0x2200
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// Filesystem Area 0x3000 - 0x3fff
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#define FILETABLE_LOC 0x3000
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// Font area 0x4000 - 0x4fff
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#define FONT_LOC 0x4000
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#define FONT_WIDTH (FONT_LOC)
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#define FONT_HEIGHT (FONT_LOC + 1)
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// VBE Info Area 0x6000 - 0x6fff
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#define MODE_INFO_BLOCK_LOC 0x6000 // 512 Bytes
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// Smap Area 0x7000 - 0x7bff
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#define SMAP_ENTRY_COUNT 0x7000
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#define SMAP_ENTRIES 0x7004
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// Bootblock 0x7c00-0x9bff
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#define BOOTBLOCK_LOC 0x7c00
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// Superblock 0x9c00-0xabff
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#define SUPERBLOCK_LOC 0x8c00
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// First INode from bootloader
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#define BOOT_FIRST_INODE_LOC 0xb000
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#define SCRATCH_BLOCK_LOC 0xc000
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// Other addresses
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#define KERNEL_LOC 0x100000
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#define KERNEL_MALLOC_AREA 0x300000
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#define MEMMAP_AREA 0x30000
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#endif
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