
Mainboard
Serial Interface Header: COM1/COM2
This mainboard provides two COM headers for you to connect external serial connectors on the back panel of your case. Attaching the serial connector cables (Optional) onto these two headers, then you can use the serial connectors to attach with a mic, modem or other peripheral devices.
| Pin | Assignment | Pin | Assignment |
| 1 | RIN1 | 2 | RIN3 |
| 3 | DOUT2 | 4 | DOUT3 |
COM1/2 | 5 | Ground | 6 | RIN2 |
| 7 | DOUT1 | 8 | RIN4 |
| 9 | 10 | N/A |
Printer Interface Header: PRT
This mainboard provides a PRT header for you connecting an external printer connector on the back panel of your case. Attaching the printer connector cable (Optional) onto this header, then you can use this printer connector to attach with a printer.
| Pin | Assignment | Pin | Assignment |
| 1 | RSTB- | 2 | RPDR0 |
| 3 | RPDR1 | 4 | RPDR2 |
| 5 | RPDR3 | 6 | RPDR4 |
| 7 | RPDR5 | 8 | RPDR6 |
| 9 | RPDR7 | 10 | ACK- |
| 11 | BUSY | 12 | PE |
| 13 | SLCT | 14 | RAFD- |
| 15 | ERR- | 16 | RINIT_P- |
| 17 | RSLIN- | 18 | Ground |
PRT | 19 | Ground | 20 | Ground |
21 | Ground | 22 | Ground | |
| 23 | Ground | 24 | Ground |
| 25 | Ground | 26 | Key |
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