tiny-os.asm

来自「Programming for feal strong programmers」· 汇编 代码 · 共 32 行

IDEAL
RADIX   16
P486
MODEL   LARGE

include 'tiny-os.inc'

STACK   STACK_SIZE

DATASEG
DSEG_BEG = THIS WORD

        real_ss dw      ?
        real_sp dw      ?
        real_es dw      ?

GDT_BEG = $
LABEL   gdtr            WORD

gdt_0   desc_struc <0,0,0,0,0>
gdt_gdt desc_struc <GDT_SIZE-1,,,DATA_ACC,0>
gdt_idt desc_struc <IDT_SIZE-1,,,IDT_ACC,0>
gdt_ds  desc_struc <DSEG_SIZE-1,,,DATA_ACC,0>
gdt_cs  desc_struc <CSEG_SIZE-1,,,CODE_ACC,0>
gdt_ss  desc_struc <STACK_SIZE-1,,,DATA_ACC,0>
gdt_bio desc_struc <B_DATA_SIZE-1,B_DATA_ADDR,0,DATA_ACC,0>
gdt_crt desc_struc <CRT_SIZE-1,CRT_LOW,CRT_SEG,DATA_ACC,0>
gdt_mda desc_struc <MONO_SIZE-1,MONO_LOW,CRT_SEG,DATA_ACC,0>

GDT_SIZE = ($ - GDT_BEG)

; 帯珷徕