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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2020-04-15 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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2020-09-17 07:57:46 +02:00
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jmp near init
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2020-08-31 22:11:05 +02:00
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2020-09-17 10:59:22 +02:00
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%defstr STRVER VERSION
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%define INTVER 0x %+ VERSION
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db STRVER
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2020-08-31 22:11:05 +02:00
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2020-09-17 07:57:46 +02:00
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; mformat writes stuff until 0x3E
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params: times ( 0x3E - ($-$$) ) nop
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2020-04-26 23:14:34 +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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2020-09-17 07:57:46 +02:00
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mov ax, [params+bpb.sectoroffset]
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mov dx, [params+bpb.sectoroffset+2]
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mov ax, 0x0201
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mov cx, 0x0002
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mov dh, 0
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mov bx, 0x7E00
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int 0x13
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mov ax, [0x7E00]
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mov cx, [0x7E02]
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mov dx, [0x7E04]
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2020-08-27 22:52:16 +02:00
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int 3
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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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2020-09-17 07:57:46 +02:00
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times (0x1FE - ($-$$)) db 0
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dw 0xAA55
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db "rdos kernel"
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2020-09-17 10:59:22 +02:00
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dd INTVER
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2020-09-17 07:57:46 +02:00
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end: align 512
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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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