Ampro Corporation XTX 820 Benutzerhandbuch
Chapter 3
Hardware
44
Reference Manual
XTX 820
Pin #
Signal
Description
60
ERR*
HDSEL*
Parallel Error – This is a status output signal from the printer. A low state
indicates an error condition on the printer.
indicates an error condition on the printer.
Floppy Head Select – Selects the side for Read/Write operations (0 = side 1,
1 = side 0)
1 = side 0)
61
IRTX
IR Transmit Data (HPSIR or ASKIR)
62
PD6
Parallel Port Data 6 – This signal (0 to 7) provides a parallel port data signal
and is the printer data MSB.
and is the printer data MSB.
63
RXD2
Receive Data 2 – Serial port 2 receive data in.
64
INIT*
DIR*
Parallel Initialize* – This signal initializes the printer. Output in standard
mode, I/O in ECP/EPP mode.
mode, I/O in ECP/EPP mode.
Floppy Direction – Direction of head movement (0 = inward motion,
1 = outward motion).
1 = outward motion).
65, 66
GND
Ground
67
RTS2*
Request To Send 2 – Indicates Serial port 2 is ready to transmit data. Used
as hardware handshake with CTS2 for low level flow control.
as hardware handshake with CTS2 for low level flow control.
68
PD5
Parallel Port Data 5 – Refer to pin-58 and 80 for more information.
69
DTR2*
Data Terminal Ready 2 – Indicates Serial port 1 is powered, initialized, and
ready. Used as hardware handshake with DSR2 for overall readiness.
ready. Used as hardware handshake with DSR2 for overall readiness.
70
SLCTIN*
STEP*
Select In – This output signal is used to select the printer. I/O pin in
ECP/EPP mode.
ECP/EPP mode.
Floppy Step – Low pulse for each track-to-track movement of the head.
71
DCD2*
Data Carrier Detect 2 – Indicates external serial device is detecting a carrier
signal (i.e., a communication channel is currently open). In direct connect
environments, this input is driven by DTR2 as part of the DTR2/DSR2
handshake.
signal (i.e., a communication channel is currently open). In direct connect
environments, this input is driven by DTR2 as part of the DTR2/DSR2
handshake.
72
PD4
DSKCHG*
Parallel Port Data 4 – Refer to pin-58 and 80 for more information.
Floppy Disk Change – Senses the drive door is open or the diskette has been
changed since the last drive selection.
changed since the last drive selection.
73
DSR2*
Data Set Ready 2 – Indicates external serial device is powered, initialized,
and ready. Used as hardware handshake with DTR2 for overall readiness.
and ready. Used as hardware handshake with DTR2 for overall readiness.
74
PD3
RDATA*
Parallel Port Data 3 – Refer to pin-58 and 80 for more information.
Floppy Read Data – Raw serial bit stream from drive for read operations.
75
CTS2*
Clear To Send 2 – Indicates external serial device is ready to receive data.
Used as hardware handshake with RTS2 for low level flow control.
Used as hardware handshake with RTS2 for low level flow control.
76
PD2
WP*
Parallel Port Data 2 – Refer to pin-58 and 80 for more information.
Floppy Write Protect – Senses the diskette is write protected.
77
TXD2
Transmit Data 2 – Serial port 2 transmit data out
78
PD1
TRK0*
Parallel Port Data 1 – Refer to pin-58 and 80 for more information.
Floppy Track 0 – Sense detects the head is positioned over track 0.
79
RI2*
Ring Indicator 2 – Indicates external serial device is detecting a ring
condition. Used by software to initiate operations to answer and open the
communications channel.
condition. Used by software to initiate operations to answer and open the
communications channel.