Star Micronics SP300 - Manual (Page 22)

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[Status]
[Framing error]
A framing error occurs when SPACE is detected at the stop bit. When a framing
error or a vertical parity error occurs for the data which is received, the printer
prints out a “?” mark to indicate that the error occurred.
[Compulsion switch]
When pin 6 of the peripheral unit drive circuit connector is set at “HIGH”, status
bit 7 becomes “1”.
Mechanical error
1: error
Buffer empty
1: empty
Buffer overflow
1: overflow
Compulsion switch
High level
(Switch is set to ON)
b7 b6 b5 b4 b3 b2 b1 b0
Constantly
set at “0”
Vertical parity error
1: error
Framing error
1: error
Paper empty
1: empty
0