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PC World Komputer 2001 December
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pcwk12201b.iso
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CAD-Projekt
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MegaCAD-4_5
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PLOT
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HANDSHAK.TX_
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HANDSHAK.TX
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1992-04-08
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84 lines
Plotter information: Handshake
===================
MegaCAD supports two types of handshake :
- Software Handshake XON/XOFF
- Hardware Handshake control lines
XON/XOFF
*****************
*****************
If you want to use the XON/XOFF protocol, enter 7 as the handshake
line.
On HPGL compatible plotters, the plotter can be set to use XON/XOFF by
software, all other plotters must be set to use the XON/XOFF protocol
on the hardware (dip switches).
The plotter cable must be wired in the following way to use XON/XOFF
protocol :
Plotter Computer
TxD 2 * * 2 TxD
*
RxD 3 * * 3 RxD
GND 7 * * * 7 GND
Lines 2 and 3 are crossed.
HARDWARE
*****************
*****************
When using hardware handshake, the plotter reflects its current state
on the line 20(DTR) or 4(RTS) or both, as to whether it is ready to
accept new data or not. It is a good idea to check the plotter manual
first to see which line it uses for this purpose. Usually it is line
20(DTR).
Enter a 5 or a 6 at installation time for hardware handshake to
specify which line is used on the COMPUTER side.
The line used for handshake on the plotter side (DTR or RTS) must be
connected to line 5 or 6 respectively on the computer side :
plotter computer plotter computer
************************ ************************
TxD 2 * * 2 TxD TxD 2 * * 2 TxD
* *
RxD 3 * * 3 RxD RxD 3 * * 3 RxD
GND 7 * * * 7 GND GND 7 * * * 7 GND
DTR 20 * * * 6 DSR RTS 4 * * * 6 DSR
Lines 2 and 3 are crossed.
plotter computer plotter computer
************************ ************************
TxD 2 * * 2 TxD TxD 2 * * 2 TxD
* *
RxD 3 * * 3 RxD RxD 3 * * 3 RxD
GND 7 * * * 7 GND GND 7 * * * 7 GND
DTR 20 * * * 5 CTS DTR 4 * * * 5 CTS
Lines 2 and 3 are crossed.