Pci\ven_1c00&dev_3253&cc_070005 | //free\\

| Byte | Value | Meaning | |------|-------|---------| | Base Class | 0x07 | | | Sub-Class | 0x00 | Serial Port (UART) | | Programming Interface | 0x05 | 16950 compatible (or higher) – indicates high-speed UART with 16650/16950 FIFO support, typically 128-byte FIFOs |

| Field | Value | |-------|-------| | | MosChip MCS3253 / ASIX AX99100? (or similar) | | Chip family | PCIe to dual UART + parallel port controller | | Function | Adds legacy I/O: 2 x RS-232 serial ports + 1 x IEEE1284 parallel port | pci\ven_1c00&dev_3253&cc_070005

After checking up-to-date PCI ID repositories: → Asix Electronics Corporation (formerly MosChip Semiconductor). Asix acquired MosChip's PCIe/PCI I/O controller line. Thus, the actual vendor is ASIX Electronics / MosChip . 3. Device Identification (DEV_3253) DEV_3253 corresponds to: | Byte | Value | Meaning | |------|-------|---------|