7470A Plotter and the 41
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10-28-2017, 04:07 PM
(This post was last modified: 10-28-2017 04:08 PM by 4ster.)
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7470A Plotter and the 41
I've been using the Plotter Module exclusively and not really delved into using HPGL commands not available on the Module. I am working through the "Interfacing and Programing Manual" for the plotter, and am just now realizing that I can access more functions than the limited set on the Plotter Module.
The manual only has one example of sending the plotter HPGL over HP-IL using the 41. I am confused over a few of lines in that program. Most (maybe all) HPGL commands require a terminator, commonly ETX - ASCII decimal 3. I gather Lines 13 through 18 below send the ETX terminator. The manual's example of an HP-41 program follows: 01 LBL "CTP" 02 AUTOIO 03 FIX 0 04 CF 29 05 2000 06 "SP1 PA1000," 07 ARCL X 08 OUTA 09 41 10 "LBHP " 11 ARCL X 12"^ SENDING DATA" 13 0 14 ENTER 15 3 16 BLDSPEC 17 ARCL X 18 OUTA 19 "SP0" 20 OUTA 21 END The plotter plots: "HP 41 SENDING DATA" and puts pen 1 back in it's storage position. I've never encountered BLDSPEC used in this way. I've always assumed it was only for creating special characters for the printer. How does it work to create an ETX in HPGL? Steve In order of appearance: HP 41CV, CMT-MCGPS, HP 41CX, DM 41, DM 42 |
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7470A Plotter and the 41 - 4ster - 10-28-2017 04:07 PM
RE: 7470A Plotter and the 41 - Mark Hardman - 10-28-2017, 04:42 PM
RE: 7470A Plotter and the 41 - 4ster - 10-28-2017, 05:16 PM
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