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Implemented Paging! Moved Kernel to 0x100000, Moved TSS above 1M, Moved V86 to 0x8000, Moved Usermode test to 0x400000, Moved lots of things!

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This commit is contained in:
Lucia Ceionia
2023-01-31 21:26:43 -06:00
parent 43e902e83c
commit afaf5e1a03
14 changed files with 274 additions and 161 deletions
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35
gdt.nasm Normal file
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global ivt
ivt: dd 0x00000000
global gdt_desc
gdt_desc:
dw gdt_end - gdt
dd gdt
gdt:
gdt_null: dq 0
gdt_code: dw 0xFFFF, 0 ; bits 0-15 limit (4GB), bits 0-15 base address
db 0 ; bits 16-23 base address
db 10011010b ; access byte
db 11001111b ; bits 16-19 limit (4GB), 4 bits flags
db 0 ; bits 24-31 base address
gdt_data: dw 0xFFFF, 0 ; bits 0-15 limit (4GB), bits 0-15 base address
db 0 ; bits 16-23 base address
db 10010010b ; access byte
db 11001111b ; bits 16-19 limit (4GB), 4 bits flags
db 0 ; bits 24-31 base address
gdt_r3code: dw 0xFFFF, 0 ; bits 0-15 limit (4GB), bits 0-15 base address
db 0 ; bits 16-23 base address
db 0xFA ; access byte
db 11001111b ; bits 16-19 limit (4GB), 4 bits flags
db 0 ; bits 24-31 base address
gdt_r3data: dw 0xFFFF, 0 ; bits 0-15 limit (4GB), bits 0-15 base address
db 0 ; bits 16-23 base address
db 0xF2 ; access byte
db 11001111b ; bits 16-19 limit (4GB), 4 bits flags
db 0 ; bits 24-31 base address
gdt_tss: dw 0x2080, 0x0000;26*4, tss_data ; bits 0-15 limit (4GB), bits 0-15 base address
db 0x20 ; bits 16-23 base address
db 0x89 ; access byte
db 00000000b ; bits 16-19 limit (4GB), 4 bits flags
db 0 ; bits 24-31 base address
gdt_end: