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0x1000
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error: program origin redefined
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[ bits 16 ]
[ org 0x7c00 ]
start: jmp loader
;*************************************************;
; OEM Parameter block / BIOS Parameter Block
;*************************************************;
TIMES 0Bh-$+start DB 0
bpbBytesPerSector: DW 512
bpbSectorsPerCluster: DB 1
bpbReservedSectors: DW 1
bpbNumberOfFATs: DB 2
bpbRootEntries: DW 224
bpbTotalSectors: DW 2880
bpbMedia: DB 0xF0
bpbSectorsPerFAT: DW 9
bpbSectorsPerTrack: DW 18
bpbHeadsPerCylinder: DW 2
bpbHiddenSectors: DD 0
bpbTotalSectorsBig: DD 0
bsDriveNumber: DB 0
bsUnused: DB 0
bsExtBootSignature: DB 0x29
bsSerialNumber: DD 0xa0a1a2a3
bsVolumeLabel: DB "MOS FLOPPY "
bsFileSystem: DB "FAT12 "
;***************************************
; Prints a string
; DS=>SI: 0 terminated string
;***************************************
Print:
lodsb
or al, al
jz PrintDone
mov ah, 0eh
int 10h
jmp Print
PrintDone:
ret
;*************************************************
; Bootloader Entry Point
;*************************************************
loader:
.Reset:
mov ah, 0
mov dl, 0
int 0x13
jc .Reset
mov ax, 0x1000
mov es, ax
xor bx, bx
mov ah, 0x02
mov al, 1
mov ch, 1
mov cl, 2
mov dh, 0
mov dl, 0
int 0x13
jmp 0x1000:0x0
times 510 - ($-$$) db 0
dw 0xAA55
; End of sector 1, beginning of sector 2 ---------------------------------
org 0x1000
cli
hlt
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; End of sector 1, beginning of sector 2 ---------------------------------
org 0x1000
cli
hlt