[OpenBIOS] PIC Passthough( VGA )

[Segher Boessenkool]

Hi again,

On Mon, Dec 18, 2017 at 08:05:57AM -0500, Jd Lyons wrote:
> > dff does:
> > 
> > : xdff
> >    " vendor-id" get-my-property IF ABORT THEN
> >    decode-int -rot 2drop   dup TO x93b   10de <> IF ABORT THEN
> >    " device-id" get-my-property IF ABORT THEN
> > ...
> > 
> > so it seems the device-id or vendor-id propertie don't exist, or don't
> > have the right value?  Or you don't have a current instance, perhaps.
> 
> I don’t know, maybe because we’re only executing the FCode from 4000040, past the part in the Rom where the Device ID is in the PCI Header?
> 
> It looks like it just sets the Vendor ID to 10de, but I’m un sure what it does for the Device ID, that seem to be the point where it’s breaking.
> 
>       (offset) 5 
> 401000d : (compile)  [ 0xe05 ]
> 401000e : (compile) b(endcase) [ 0xc5 ]
> 401000f : (compile) over [ 0x48 ]
> 4010010 : (compile) b(to) [ 0xc3 ]
> 4010014 : (compile)  [ 0xe36 ]
> 4010016 : (compile) encode+ [ 0x112 ]
> 4010017 : (compile) 2dup [ 0x53 ]
> 4010018 : (compile) b(to) [ 0xc3 ]
> 401001b : (compile) b(to) [ 0xc3 ]
> 401001f : (compile)  [ 0xc7b ]
> 4010021 : (compile) property [ 0x110 ]
> 4010022 : (compile) b(;) [ 0xc2 ]
> 4010023 : b(') [ 0x11 ]
> 4010026 : b(to) [ 0xc3 ]
> 401002a :  [ 0xe34 ]
> 401002c :  [ 0xdff ]
> 
> byte-load: exception caught!
>  ok
> 1 > .properties 
> name                      "pci10de,141"
> vendor-id                 10de 
> device-id                 141 

So device-id is set, too.

Is there a current instance?   my-self .   will show you.

If you have trouble tracking down where the abort / exception is coming
from, it often helps to look at memory:

here 200 - 400 dump


Segher