Getting PCI info

[Rob de Jong]

I'm trying to find a way to enumerate PCI devices in a PC. I'm looking for the vendor ID and the device ID strings of the PCI devices (in particular the network card). Any ideas ? Would int 1A with ax=B401 do the trick ?

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[Paul Dixon]

Rob,
try the following. INT &h1a with ah=&hb1 is used to access the PCI system.

Paul.

%FORCE32bit=&h66
cls

PCIpresent%=0
LastPCIbus%=0
PCIrev%=0
PCImechanism%=0

'get PCI system data
!mov ax,&hb101
!int &h1a

!jnc zz
!and ah,&hff
!jnz xit

zz:
!db %FORCE32bit
!cmp dx,&h20494350
!jnz xit

!mov PCImechanism%,al
!mov PCIrev%,bx
!mov LastPCIbus%,cl
!mov ax,-1
!mov PCIpresent%,ax

xit:

If PCIpresent% then

print "last bus number = ";LastPCIbus%
print "PCI revision number = ";hex$(PCIrev%\256);".";hex$(PCIrev% and 255)

if bit(PCImechanism%,0) then print "Configuration mechanism #1 supported"
if bit(PCImechanism%,1) then print "Configuration mechanism #2 supported"
if bit(PCImechanism%,4) then print "Special cycle supported via configuration mechanism #1"
if bit(PCImechanism%,5) then print "Special cycle supported via configuration mechanism #2"


else
print "PCI system not present"
end if

for bus%=0 to LastPCIbus%
for func%=0 to 255
flag%=0

'get vendor ID
!mov ax,&hb109    ;read PCI headre
!mov bh,bus%      ;on this bus
!mov bl,func%     ;for this device
!mov di,0         ;location 0 = vendor ID

!int &h1a

!jc fail
!and ah,&hff
!jnz fail

!mov config%,cx
!inc flag%

fail:

if flag% and config%<>&hffff then
print "bus ";bus%;" device number ";func%\8;" function ";func% and 7;"vendor ID=";hex$(config%);


flag%=0

'get device ID
!mov ax,&hb109
!mov bh,bus%
!mov bl,func%
!mov di,2        ;location 2 = device ID

!int &h1a

!jc fail2
!and ah,&hff
!jnz fail2

!mov config%,cx
!inc flag%
fail2:

if flag% then print " device ID ="hex$(config%) else print

end if

next
next

[Sebastian Groeneveld]

Rob,

There is a nice program written by Ralph Brown (yes, from the marvellous interrupt list)
that obtains LOTS of information from PCI devices... and the great thing is, the source
is included (a single C++ file)!

You can find it at: http://www.cs.cmu.edu/~ralf/pub-files/rbpci119.zip

And you might want to check out the other utils he wrote: http://www.cs.cmu.edu/~ralf/files.html

Greetings,

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Sebastian Groeneveld
mailto:[email protected][email protected]</A>

[Rob de Jong]

Guys, thanx a 1M. It was exactly what I needed. One more: how to find this info for a PCMCIA-card ?

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[Tony Burcham]

I modified the PB code so it now also looks up vendors and
device descriptions. I posted it on my website today.
The url is http://www.gvii.net/tburcham/PCI.zip. The file
contains the PB3.5 source and the freeware vendor database.

Here's the modified code:

'***** PCI.bas for PBDos 3.5 *****
defint A-Z
%FORCE32bit=&h66
cls
screen 0
color 1,7

for n = 1 to 25
? string$(80," ")
next n

? string$(80,"*")
color 4
? " This retrieves and displays information about PCI devices"
? "installed in the system it's run on."
? "From demo code modified by Tony Burcham: [email protected]"
? "I saw no indication of a copyright and my part is public domain"
? "as is 'PCIDEVS.TXT' according to its author."
? "For updates visit: <A HREF="http://members.hyperlink.net.au/~chart"" TARGET=_blank>http://members.hyperlink.net.au/~chart"</A>
? "Press any key to skip the 3-second delay between devices."
?

color 1
? string$(80,"*")

open "C:\PB\EXAMPLE\PCIDEVS.txt" for input as #1

public V$
public D$

PCIpresent%=0
LastPCIbus%=0
PCIrev%=0
PCImechanism%=0

'get PCI system data
!mov ax,&hb101
!int &h1a
!jnc zz
!and ah,&hff
!jnz xit
zz:
!db %FORCE32bit
!cmp dx,&h20494350
!jnz xit
!mov PCImechanism%,al
!mov PCIrev%,bx
!mov LastPCIbus%,cl
!mov ax,-1
!mov PCIpresent%,ax
xit:
If PCIpresent% then
color 15
print "last bus number = ";LastPCIbus%
print "PCI revision number = ";hex$(PCIrev%\256);".";hex$(PCIrev% and 255)
if bit(PCImechanism%,0) then print "Configuration mechanism #1 supported"
if bit(PCImechanism%,1) then print "Configuration mechanism #2 supported"
if bit(PCImechanism%,4) then print "Special cycle supported via configuration mechanism #1"
if bit(PCImechanism%,5) then print "Special cycle supported via configuration mechanism #2"

else
color 4
print "PCI system not present"
end if

for bus%=0 to LastPCIbus%
for func%=0 to 255
flag%=0

'get vendor ID
!mov ax,&hb109 ;read PCI header
!mov bh,bus% ;on this bus
!mov bl,func% ;for this device
!mov di,0 ;location 0 = vendor ID
!int &h1a
!jc fail
!and ah,&hff
!jnz fail
!mov config%,cx
!inc flag%
fail:
if flag% and config%<>&hffff then

color 15
print "bus";bus%;" device number";func%\8;" function";func% and 7;" vendor ID =";hex$(config%)
V$ = Vendor$(config%)
flag%=0

'get device ID
!mov ax,&hb109
!mov bh,bus%
!mov bl,func%
!mov di,2 ;location 2 = device ID
!int &h1a
!jc fail2
!and ah,&hff
!jnz fail2
!mov config%,cx
!inc flag%
fail2:

color 15
if flag% then print " device ID ="hex$(config%) else print
D$ = Device$(config%)
color 0
? V$
color 2
? D$
color 1
? string$(80,"*")
sleep 3

end if
next
next

close 1
end


function Vendor(con as integer) as string
seek #1, 1
V$ = hex$(con)
V$ = "V" & chr$(9) & right$("0000" & V$,4)

while not eof(1)

line input #1, F$

if V$ = left$(F$,6) then
if len(F$) > 7 then Vendor$ = right$(F$,len(F$) - 7)
exit loop
end if

wend

end function

function Device(con as integer) as string
D$ = hex$(con)
D$ = "D" & chr$(9) & right$("0000" & D$,4)

while not eof(1)

line input #1, F$

if D$ = left$(F$,6) then
if len(F$) > 7 then Device$ = right$(F$,len(F$) - 7)
exit loop
end if

wend

end function


'Tony.




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