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B.S.3 Status register (379H Read)
I
S~T
I'
I
N~:J
' I
Bit
7
6
5
3
2
0
BSY
ACK
PE
ERR
- Status data drom the printer -
BSY
- BUSYI signal is input inverted from the printer
ACK
- ACKO is input from the printer
PE
- PEl is input from the printer
SLCT - SELECI is input from the printer
ERR
- ERROO is input from the printer
B.5.4 Control Register Output (37AH Write)
Bit
7
6
I
5
4
3
2
PDIR
Not'U5l'!d
IRQEN
SlTIN
IPRT
- Controlling signals -
1
0
AUTFD
STRB
IRQEN - When this bit is set to "I", IRQ signal from the
printer port is output to the 82CS9 (PIC).
PDIR
- This signal decides the data transfer direction
of the 8-bit data on the connector. When this
bit is set to "I", input from the connector is
enabled, and when "0", output from the Data
Register is enabled.
STRB
- This signal is inverted to be output to the
connector.
AUFD
This signal is inverted to be output to the
connector. This bit returnes from the connector
after being sent to it.
IPRT
- This signal is output to the printer as it is.
SLTIN - This signal is inverted to be output to the
printer.
This bit returnes from the connector
after being sent.
B - 12
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