2020-07-04 10:35:38 +02:00
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cpu 8086
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2020-09-15 21:44:32 +02:00
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org 0x7C00
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2020-04-15 00:17:58 +02:00
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2020-07-04 10:35:38 +02:00
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%include "inc/bpb.asm"
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2020-09-15 21:44:32 +02:00
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%include "inc/mbr.asm"
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2020-10-13 22:10:23 +02:00
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%include "inc/fcb.asm"
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2020-04-15 00:17:58 +02:00
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2020-09-15 21:44:32 +02:00
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; kernel stack size in words
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%define stacksize 512
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2020-08-31 22:11:05 +02:00
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2020-07-04 10:35:38 +02:00
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init: cli
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xor ax, ax
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mov ds, ax
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mov es, ax
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mov ss, ax
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mov sp, ( stack+stacksize )
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2020-04-26 23:14:34 +02:00
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2020-09-27 17:45:19 +02:00
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print_banner: mov si, banner
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mov ah, 0x0e
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xor bx, bx
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.loop: lodsb
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int 0x10
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cmp al, 0x0D
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jnz .loop
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2020-08-27 22:52:16 +02:00
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2020-10-13 22:10:23 +02:00
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cmp dl, 0x80
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jc .k
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sub dl, (0x80-2)
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.k: mov [defdrv], dl
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2020-10-11 23:33:01 +02:00
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call dskrst
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2020-10-13 22:10:23 +02:00
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mov bx, testfcb
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call fcbfst
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2020-10-11 23:33:01 +02:00
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2020-09-15 21:44:32 +02:00
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hlt: hlt
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jmp hlt
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2020-04-20 19:13:06 +02:00
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2020-10-13 22:10:23 +02:00
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%include "kernel/fcb.asm"
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%include "kernel/drive.asm"
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section .data
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2020-10-11 23:33:01 +02:00
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%defstr VERSIONSTR VERSION
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banner: db "RDOS ", VERSIONSTR, 0x0A, 0x0D
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2020-09-17 07:57:46 +02:00
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2020-10-13 22:10:23 +02:00
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testfcb: db 0
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db "HELLO ", "COM"
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times 30 db 0
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2020-09-17 07:57:46 +02:00
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2020-04-23 21:36:20 +02:00
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section .bss
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2020-09-15 21:44:32 +02:00
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stack: resb stacksize
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