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U6&U8 : Font and BIOS socket
This socket is used to install BIOS and character font. Each type of printer
requires different BIOS and character font. For example, the BIOS for friction
type mechanism and the BIOS for sprocket type mechanism are different.
JUMPERS & SWITCHES
Jumper Setting (Interface Select)
INTERFACE JP3 JP4 JP6-JP13 JP14 JP15
SERIAL PORT
OPEN 1-2 SHORT 1-2 SHORT SHORT
PARALLEL PORT
2-3 SHORT 2-3 SHORT 2-3 SHORT OPEN
When using either interface, the connector of the other interface must be
disconnected. DIP SW3 and DIP SW4 have to be turned off when parallel
interface is used.
Serial Interface Switch
DIP - SW1
Switch Function ON OFF
1-1 Data transmission
1-2 Rate (baud rate ) See next table
1-3
1-4 Not used
1-5 Hand shake DTR mode X-ON/X-OFF mode
1-6 Data bit 8-bit data 7-bit data
1-7 Parity check No parity check Parity check
1-8 Parity selection Odd parity Even parity