Bar Sizing

Get the BAR sizing from Telescan

The ¹BARs ( Base Address Registers ) has a specified size assigned to them from the donor device, to make our DMA firmware look like the real donor card we will also copy the sizing

• Click on BAR0
  

• To the right, we can see Base Address Register 0

• To get the sizing, we need to fill the bits in the white field with 1 s
  
  (Before)
  
  (After)

• Right click on the white section in Base Address Register 0:

  • Write
  • Dword at offset 010h
    
    (Doing this will deactivate the device, it's normal)

Now we can see the sizing:

(Write this down)

If a bar ends in:
01 = IO
04 = 64-bit
0C = 64-bit, prefetchable

The bar after a 64-bit bar (ending in 04 and 0C) is always FFFFFFFF
Example:
BAR0: FFFFE004
BAR1: FFFFFFFF

If you want to insert your BAR0 data into pcileech_bar_zero4k.coe, it won't work if you set BAR0 to 01 (IO)

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