Constant ROMS_PER_TABLE_ROUND 

pub const ROMS_PER_TABLE_ROUND: usize = 32;

Dual-port ROMs per table round: 64 S-boxes, two per ROM.

Each DualTableRom is one true dual-port T0 ROM (one BRAM18) serving two state bytes, so a table round needs 32 of them for its 64 bytes.