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B.5.5 Printer mode register (37FH Write)
Bit
6
- Direction signal -
5
4
y
Notmed
+ BOIS (Bidirection disable)
3
2
This signal is used to control the direction of the data
to or from the printer port.
When this bit is set to "0", bit 7 of the control register
is disabled, and only output from the printer port is
enabled.
Control Register
bit 7
Data
to the connector
Mode Register
bit7
~--.....I
FIGURE B-4
Data Transfer Direction Control
B - 13
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