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3.2.6
BUFFER FULL SIGNALS
North Star HSIO-4
The HSIO-4 supports printers that indicate
buffer full status on pin 20 (DTR) or on pin
19 (SCA). Consult the manual for your printer
to determine which pin it uses to indicate
buffer full status. Depending upon the
maufacturer, this signal may be identified as
"Printer Ready" or "Buffer Full."
expects this signal to be high when it is
required to send characters and low when it is
required to wait.
As supplied, the HSIO-4 expects the buffer
full signal on pin 20. Some printers, however,
use pin 19. Printers using pin 19 require the
following modification to the HSIO-4 board:
1.
Locate the 3-pin jumper area to the
right of the connector for the port to be
modified.
(See Table 3-5 below).
BUFFER FULL JUMPER AREAS
Por.t
A
B
C
D
35
Table 3-5
Jumper A rea
JP1
JP2
JP3
JP4
User/Technical Manual
The HSIO-4
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