Sutter Instrument Lambda DG-4, Руководство по эксплуатации

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LAMBDA DG-4 & DG-5 OPERATION MANUAL – REV.
3.05C
(
20150414
)
43
REMOTE PC PARALLEL PORT LAMBDA DG-4 CONTROLLER
Pin # Pin Description Pin # Pin Description
18 GROUND 18 NC
19 GROUND 19 NC
20 GROUND 20 NC
21 GROUND 21 NC
22 GROUND 22 NC
23 GROUND 23 NC
24 GROUND 24 GROUND
25 GROUND 25 GROUND
Commands may be sent through the printer adapter by using an OUT command from basic,
or an equivalent command from another language. In Microsoft QuickBasic the form of the
command is:
OUT port, data
Where the decimal value of port would be 956, 888, or 632 depending on your system, and
data would be a number indicating the desired command.
The number to use for data either will be one of the FILTER NUMBERS or will correspond
to one of the commands in the table presented earlier in this section. Thus, to command a
move to FILTER NUMBER 4 using a printer adapter having a base address of 888, you would
use the following command:
OUT 888, 4
4.1.7 Reading the Status of the Lambda DG-4/5
The BUSY line is the only output from the Lambda DG-4/5. In the BUSY line section (above),
there is a discussion of some of the factors to consider in deciding whether to read the BUSY
signal at all. If you have determined that your application requires this output to be read
from your computer, this can be done through the 4-bit input port on the printer adapter. The
address of this port will be the base address of the printer adapter plus one.
Table 4-7. Parallel port numbering and addressing.
ADDRESS PORT NUMBER AND LOCATION
BASE INPUT PORT
LPT1 on Graphics Adapter 956 (3BC HEX) 957 (3BD HEX)
LPT1 on Printer Adapter 888 (378 HEX) 889 (379 HEX)
LPT2 on Printer Adapter 632 (278 HEX) 633 (279 HEX)
The 4-bit input port uses only the four most significant bits at that address: bits 4, 5, 6 and 7.
Bits 0, 1, 2 and 3 are not used by the printer adapter and will normally read as 1. Bit 7 in this
input port is normally used by the printer to signal that it is “busy”. That bit is set by the
data signal from the printer to Pin 11 of the DB-25 parallel port connector on the back of the
computer. The Lambda DG-4/5 uses this same bit in the computer’s printer adapter to