82 lines
3.2 KiB
NASM
82 lines
3.2 KiB
NASM
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include 'cfg_bios.inc'
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use16
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;org 0
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rom_header:
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; PnP Option ROM header
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rom_signature dw 0xAA55 ; +0 : magic
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rom_length db BIOS_BOOT_BLOCK_SIZE ; +2 : number of 512byte blocks
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rom_entry:
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jmp init_entry ; +3 : initialization entry point
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db 'AZ'
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rom_reserved rb 0x11 ; +7 : reserved (17 bytes)
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rom_pci_struc dw pci_header ; +18h : offset to PCI data structure
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rom_expansion dw pnp_header ; +1Ah : offset to expansion header structure
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align 16
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pnp_header:
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; PnP Expansion Header
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pnp_signature db '$PnP' ; +0 : magic
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pnp_revision db 1 ; +4 : revision
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pnp_length db 2 ; +5 : length (in 16byte paragraphs)
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pnp_next dw 0 ; +6 : offset of the next header (0 if none)
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pnp_reserv1 db 0 ; +8
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pnp_checksum db 0 ; +9 : checksum
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pnp_devid dd 0x0 ; +A : device identifier
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pnp_manstr dw manstr ; +E : pointer to manufacturer string
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pnp_prodstr dw prodstr ; +10 : pointer to product name string
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pnp_devtype1 db 2 ; +12 : device type code
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pnp_devtype2 dw 0x000
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pnp_devind db 0x14 ; +15 : device indicators
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pnp_bcv dw 0 ; +16 : boot connection vector (must be 0)
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pnp_discv dw 0 ; +18 : disconnect vector
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pnp_bev dw boot_entry ; +1A : boot entry vector
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pnp_reserv2 dw 0 ; +1C
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pnp_info dw 0 ; +1E : static resource information vector
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align 16
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pci_header:
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; PCI Data Structure
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pci_magic db 'PCIR' ; +0 : magic
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pci_vendor dw BIOS_PCI_VENDOR ; +4 :
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pci_device dw BIOS_PCI_DEVICE ; +6 : sb700 PCI bridge
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pci_vdata dw 0 ; +8 : vital product data offset
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pci_length dw 0x18 ; +A : PCI data structure length
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pci_classrev dd BIOS_PCI_CLASS ; +C : rev.00 + class 04.00.00
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pci_size dw BIOS_BOOT_BLOCK_SIZE ; +10 : image length (512byte blocks)
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pci_rev dw 0 ; +12
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pci_codetype db 0 ; +14 : x86
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pci_indicator db 0x80 ; +15 : last image
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pci_reserved dw 0
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align 4
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manstr:
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db 'Kolibri-A Operation System',0
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prodstr:
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db 'ver.ROM-0.1',0
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align 4
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boot_entry:
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@@:
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boot_failure:
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int 18h ; return to BIOS Boot sequence
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align 4
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init_entry:
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xor ax, ax
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mov [cs:rom_length], al
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mov al, 0x20
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retf
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check = 0
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repeat $-$$
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load a byte from $$+%-1
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check = a + check
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end repeat
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check_byte db 0x100 - (check mod 256)
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times (512-$) db 0
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