# Enter Computer’s Sweet-P pen plotter **URL:** \ **Category:** General Guidance\ **Created:** [September 23, 2022, 9:27am UTC](https://forum.arduino.cc/t/enter-computer-s-sweet-p-pen-plotter/1034820 "2022-09-23T09:27:30Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![sweet-p](https://avatars.discourse-cdn.com/v4/letter/s/8491ac/32.png) [@sweet-p](https://forum.arduino.cc/u/sweet-p)\ **Post date:** [September 23, 2022, 9:27am UTC](https://forum.arduino.cc/t/enter-computer-s-sweet-p-pen-plotter/1034820/1 "2022-09-23T09:27:30Z")
Hello, I was wondering if I could get some help finding a programming manual for enter computer’s sweet-p pen plotter/ it’s programming manual. If not— Would someone be willing to walk me through updating the brains of the computer, so that I can utilize this dream machine? -Regards ---
**Author:** ![lastchancename](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/lastchancename/32/215426_2.png) [@lastchancename](https://forum.arduino.cc/u/lastchancename)\ **Post date:** [September 23, 2022, 9:56am UTC](https://forum.arduino.cc/t/enter-computer-s-sweet-p-pen-plotter/1034820/2 "2022-09-23T09:56:19Z")
It looks like a pretty standard desktop pen plotter from the 80s/90s. To get more help, you should really post as many links references as you can find. To get started - try looking into HPGL which was often used with pen plotters. I didn’t look to see if it uses RS232 or a Centronjcs parallel interface - you’ll need to address & choose based on what you’re using. You’ll be limited in what you can do with the 8-bit Arduinos… the ESP/pi’s etc and higher level processors will be a better match. ---
**Author:** ![markd833](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/markd833/32/1186928_2.png) [@markd833](https://forum.arduino.cc/u/markd833)\ **Post date:** [September 23, 2022, 10:24am UTC](https://forum.arduino.cc/t/enter-computer-s-sweet-p-pen-plotter/1034820/3 "2022-09-23T10:24:54Z")
I did find this 1 page from Byte magazine that may help: [https://worldradiohistory.com/hd2/IDX-Consumer/Archive-Byte-IDX/IDX/80s/86-87/Byte-1985-06-OCR-Page-0071.pdf](https://worldradiohistory.com/hd2/IDX-Consumer/Archive-Byte-IDX/IDX/80s/86-87/Byte-1985-06-OCR-Page-0071.pdf) RS232 interface and HPGL support from a quick read. ---
**Author:** ![alto777](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/alto777/32/317385_2.png) [@alto777](https://forum.arduino.cc/u/alto777)\ **Post date:** [September 23, 2022, 11:02am UTC](https://forum.arduino.cc/t/enter-computer-s-sweet-p-pen-plotter/1034820/4 "2022-09-23T11:02:40Z")
> [@sweet-p](#): > > sweet-p pen plotter What exact model? They made one with only one pen, so. Can you snap a few photos and post them? TIA a7 ---
**Author:** ![alto777](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/alto777/32/317385_2.png) [@alto777](https://forum.arduino.cc/u/alto777)\ **Post date:** [September 23, 2022, 11:39am UTC](https://forum.arduino.cc/t/enter-computer-s-sweet-p-pen-plotter/1034820/5 "2022-09-23T11:39:24Z")
OK, until I unearthed it, I would have sworn I would be pulling out the manual for a Sweet-P plotter. But it is a ComScriber I by COMREX for which I have a thin User's Guide. I wonder if my certainty stems from the possibility that they are one and the same, that is to say one is a rebadged version of the other. As much googling as I can take time for now makes me think the whole thing was a fever dream. If you find that the Sweet-P was ever the ComScriber I, just say, and I'll go to a bit more trouble over here. The interface is parallel, I remember making a serial to parallel converter out of parts found around the house, well my house anyway, and getting it going with fairly simple serial output. a7 ---
**Author:** ![markd833](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/markd833/32/1186928_2.png) [@markd833](https://forum.arduino.cc/u/markd833)\ **Post date:** [September 23, 2022, 2:57pm UTC](https://forum.arduino.cc/t/enter-computer-s-sweet-p-pen-plotter/1034820/6 "2022-09-23T14:57:44Z")
And here's some more useful information on the plotter including the commands for the SPGL (Sweet-P Graphics Language) [http://www.bitsavers.org/pdf/enterComputer/brochures/Sweet-P-PersonalPlotter+prricelistBrochure.pdf](http://www.bitsavers.org/pdf/enterComputer/brochures/Sweet-P-PersonalPlotter+prricelistBrochure.pdf) There's also an image of the rear of an SP-601 plotter on Wikimedia: ![](https://europe1.discourse-cdn.com/arduino/original/4X/7/b/8/7b80e76c73133db12d4fbd61681a362876663d0f.jpeg) If the rear of your plotter looks similar to this, then it shouldn't be too difficult to get it going - even without any user manual. There's also a github page for an HPGL to SPGL converter which you may find useful here: > **[GitHub - jared6502/Hpgl2Spgl: Convert HPGL to SPGL as used by the Sweet-P...](https://github.com/jared6502/Hpgl2Spgl)** > > Convert HPGL to SPGL as used by the Sweet-P SP-100/Heathkit IR-5208 plotter - GitHub - jared6502/Hpgl2Spgl: Convert HPGL to SPGL as used by the Sweet-P SP-100/Heathkit IR-5208 plotter A google search for "spgl plotter language" brings up several old magazine articles on the plotter(s). ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [March 22, 2023, 2:57pm UTC](https://forum.arduino.cc/t/enter-computer-s-sweet-p-pen-plotter/1034820/7 "2023-03-22T14:57:54Z")
Closed on March 22, 2023, 2:57pm UTC This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.