| 0,0 → 1,46 |
|---|
| ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| ;; ;; |
| ;; PCI16.INC ;; |
| ;; ;; |
| ;; 16 bit PCI driver code ;; |
| ;; ;; |
| ;; Version 0.2 December 21st, 2002 ;; |
| ;; ;; |
| ;; Author: Victor Prodan, victorprodan@yahoo.com ;; |
| ;; ;; |
| ;; See file COPYING for details ;; |
| ;; ;; |
| ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| |
| |
| init_pci_16: |
| |
| pushad |
| |
| xor ax,ax |
| mov es,ax |
| mov byte [es:0x9020],1 ;default mechanism:1 |
| mov ax,0xb101 |
| int 0x1a |
| or ah,ah |
| jnz pci16skip |
| |
| mov [es:0x9021],cl ;last PCI bus in system |
| mov [es:0x9022],bx |
| mov [es:0x9024],edi |
| |
| ; we have a PCI BIOS, so check which configuration mechanism(s) |
| ; it supports |
| ; AL = PCI hardware characteristics (bit0 => mechanism1, bit1 => mechanism2) |
| test al,1 |
| jnz pci16skip |
| test al,2 |
| jz pci16skip |
| mov byte [es:0x9020],2 ; if (al&3)==2 => mechanism 2 |
| |
| pci16skip: |
| |
| mov ax,0x1000 |
| mov es,ax |
| |
| popad |