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Chapter 9. IEEE-1284 Parallel Port Interface
71
Line Printer Status Register
Register: Line Printer Status
Address: 379h
Access: Read
BSY
ACK
PE
SEL
ERR
IRQ
1
1
7
6
5
4
3
2
1
0
Printer Interrupt
0 Printer acknowledged
1 Read from status port
Printer Error
0 Active
1 Inactive
Printer Select
0 Off line
1 On line
Paper Empty
0 No
1 Yes
Printer Acknowledge
0 Ready to receive
1 Not ready to receive
Printer Busy
0 Yes
1 No
Line Printer Status Register
Line Printer Control Register
7
6
5
4
3
2
1
0
Register: Line Printer Control
Address: 37Ah
Access: Read and Write
Data Strobe
0 Not asserted
1 Asserted
1
DIR
IEN
SEL
INP
AFD
STB
Line Feed
0 No
1 Yes
1
Select Input
0 Off line
1 On line
Initialize Printer
0 Reset
1 No reset
Direction (Write only)
0 To printer
1 From printer
Interrupts
0 Disabled
1 Enabled
Line Printer Control Register
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