Use PCI bus scan to find all ATA controllers. Several IDE fixes.

Find all ATA controllers via a pci bus - don't poke random IO ports.
Force IDE drives to 512 byte sector size; word 5 in identify command
    isn't defined on recent drives.
Add debugging info for extended_access and int 1348 calls.
int 1348 enhancements - general cleanup, report drives as PCI, correct
    iface_path/device_path settings, checksums should be a 2's
    complement, call disk_ret() on all return paths, always use dpte
    revision 0x11, don't set size above 30 bytes.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/biosvar.h b/src/biosvar.h
index 3d03cec..7089172 100644
--- a/src/biosvar.h
+++ b/src/biosvar.h
@@ -142,9 +142,9 @@ struct dpte_s {
 };
 
 struct ata_channel_s {
-    u8  iface;        // ISA or PCI
     u16 iobase1;      // IO Base 1
     u16 iobase2;      // IO Base 2
+    u16 pci_bdf;
     u8  irq;          // IRQ
 };