- 5000 groups (N_GROUPS=5000), group 0 all-zero as required - MATMUL_START before computation, MATMUL_DONE after CRC - IEEE CRC32 over 960000-byte result region (little-endian words) - MATMUL_CRC32=XXXXXXXX format, 8 hex digits, no 0x prefix - Uncached ExtRAM access (0xA0000000 segment) - Removed all debug output for minimal UART traffic