In the 0x88 board-representation an 128 [[Byte|byte]] [[Array|array]] is used. Only the half of the board-array are valid squares representing the position. The second half is almost garbage as usually not addressed. The [[little-endian]] layout of an 0x88 array, valid indices bold:
{| class="wikitable"
! !! A !! B !! C !! D !! E !! F !! G !! H!! !! !! !! !! !! !! !!
|-
| '''! 8''' || '''70''' || '''71''' || '''72''' || '''73''' || '''74''' || '''75''' || '''76''' || '''77''' || 78 || 79 || 7A || 7B || 7C || 7D || 7E || 7F
|-
| '''! 7''' || '''60''' || '''61''' || '''62''' || '''63''' || '''64''' || '''65''' || '''66''' || '''67''' || 68 || 69 || 6A || 6B || 6C || 6D || 6E || 6F
|-
| '''! 6''' || '''50''' || '''51''' || '''52''' || '''53''' || '''54''' || '''55''' || '''56''' || '''57''' || 58 || 59 || 5A || 5B || 5C || 5D || 5E || 5F
|-
| '''! 5''' || '''40''' || '''41''' || '''42''' || '''43''' || '''44''' || '''45''' || '''46''' || '''47''' || 48 || 49 || 4A || 4B || 4C || 4D || 4E || 4F
|-
| '''! 4''' || '''30''' || '''31''' || '''32''' || '''33''' || '''34''' || '''35''' || '''36''' || '''37''' || 38 || 39 || 3A || 3B || 3C || 3D || 3E || 3F
|-
| '''! 3''' || '''20''' || '''21''' || '''22''' || '''23''' || '''24''' || '''25''' || '''26''' || '''27''' || 28 || 29 || 2A || 2B || 2C || 2D || 2E || 2F
|-
| '''! 2''' || '''10''' || '''11''' || '''12''' || '''13''' || '''14''' || '''15''' || '''16''' || '''17''' || 18 || 19 || 1A || 1B || 1C || 1D || 1E || 1F
|-
| '''! 1''' || '''00''' || '''01''' || '''02''' || '''03''' || '''04''' || '''05''' || '''06''' || '''07''' || 08 || 09 || 0A || 0B || 0C || 0D || 0E || 0F
|-
! !! A !! B !! C !! D !! E !! F !! G !! H!! !! !! !! !! !! !! !!
|}
