Absolute address and bit positions for INT_L segbits

[trayres]

Hi everyone,

I'd like to walk through the process of activating a certain src/dst pip connection manually to get a better feel for what the tool is doing.
To do this I'd like to understand what bits are set (how the configuration frames are built).

Picking an example block, INT_L_X28Y100, and a specific part (Artix-A100T), and a specific endpoint FAN_BOUNCE5->>BYP_ALT1 - how can I check if this pip is active in a bitstream, and the converse - if I want to activate this pip, what does my configuration frame look like?

This particular block is an int_l - going to the database, in the segbits_int_l.db, I find the pip I'd like to activate:
INT_L.BYP_ALT1.FAN_BOUNCE5 21_15 22_15 !23_15 24_15 25_15

Ok, but we need information about where this block is (what bus its connected to, etc) - we get that from the tilegrid.json file, specific to our part:

    "INT_L_X28Y100": {
        "bits": {
            "CLB_IO_CLK": {
                "baseaddr": "0x00000E00",
                "frames": 28,
                "offset": 0,
                "words": 2
            }
        },
        "clock_region": "X0Y2",
        "grid_x": 70,
        "grid_y": 103,
        "pin_functions": {},
        "prohibited_sites": [],
        "sites": {
            "TIEOFF_X29Y100": "TIEOFF"
        },
        "type": "INT_L"

The addressing page indicates how the frames should be built:

We have this table for the 32-bit frame address:

// Edit: Copied table formatting did not work; sorry

Reserved	31:26
Bus	25:23
Top/Bottom Half	22
Row	21:17
Column	16:7
Minor	6:0

But I am having trouble figuring out what the bits will actually look like; it looks like 28 separate frames can configure my tile (https://f4pga.readthedocs.io/projects/prjxray/en/latest/dev_database/part_specific/tilegrid.html). This same page says that an example of absolute frame address calculation can be found in the mask file chapter ( https://f4pga.readthedocs.io/projects/prjxray/en/latest/dev_database/common/mask.html )

I believe the relevant mask file is mask_clbll_l.db, but values in that file go from bit 00_00 to bit 35_63 -> 36 addresses (not 28?). I must have something wrong in my understanding. The documentation states:

The naming scheme for the mask files is the following:

mask_<tile>.db

Then I should be looking for mask_int_l.db, but I do not see this in the prjxray database.

By this point I have confused myself and my head hurts from documentation; any help is greatly appreciated.