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1159 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
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4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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6 | ;; PCI16.INC ;; |
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7 | ;; ;; |
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8 | ;; 16 bit PCI driver code ;; |
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9 | ;; ;; |
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10 | ;; Version 0.2 December 21st, 2002 ;; |
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11 | ;; ;; |
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12 | ;; Author: Victor Prodan, victorprodan@yahoo.com ;; |
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13 | ;; ;; |
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14 | ;; See file COPYING for details ;; |
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15 | ;; ;; |
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16 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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17 | |||
1206 | hidnplayr | 18 | $Revision: 1206 $ |
1159 | hidnplayr | 19 | |
20 | |||
21 | init_pci_16: |
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22 | |||
23 | pushad |
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24 | |||
25 | xor ax,ax |
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26 | mov es,ax |
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27 | mov byte [es:0x9020],1 ;default mechanism:1 |
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28 | mov ax,0xb101 |
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29 | int 0x1a |
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30 | or ah,ah |
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31 | jnz pci16skip |
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32 | |||
33 | mov [es:0x9021],cl ;last PCI bus in system |
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34 | mov [es:0x9022],bx |
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35 | mov [es:0x9024],edi |
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36 | |||
37 | ; we have a PCI BIOS, so check which configuration mechanism(s) |
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38 | ; it supports |
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39 | ; AL = PCI hardware characteristics (bit0 => mechanism1, bit1 => mechanism2) |
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40 | test al,1 |
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41 | jnz pci16skip |
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42 | test al,2 |
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43 | jz pci16skip |
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44 | mov byte [es:0x9020],2 ; if (al&3)==2 => mechanism 2 |
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45 | |||
46 | pci16skip: |
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47 | |||
48 | mov ax,0x1000 |
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49 | mov es,ax |
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50 | |||
51 | popad |