Posted By
JamesC
on 2005-02-20
20:39:30
|  Trojan Lightpen
Does anyone have one of these?
I received mine last week and finally got to play with it today. My problem is that no matter what the brightness and contrast of the monitor are, the lightpen does not work well on the drawing screen. On the menu screen it works fine.
If I remove the light from its pen, it is too sensitive and picks up rasters that I don't want. So I know the electronics part works.....
When putting the light back into its pen, I noticed that the light itself is about 4mm from the end of the pen. I cannot get it to go any closer to the end of the plastic housing. Should I cut the end of the pen so that the light can more easily see the raster beam?
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Posted By
JamesC
on 2005-02-20
20:40:41
| Re: Trojan Lightpen
I should have mentioned, the software is the Plus/4 version of the software that comes with the lightpen. I did have to modify it for NTSC by changing a couple of bytes.
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Posted By
SVS
on 2005-02-21
02:09:54
 | Re: Trojan Lightpen
What were the bytes you modified?
P.S. - A good day for you, lucky plussier!
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Posted By
Mosh
on 2005-02-21
05:55:01
| Re: Trojan Lightpen
That was a really good score James. Can you make a shorter housing for the lightpen out of something that might be lying around?
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Posted By
JamesC
on 2005-02-21
08:16:35
| Re: Trojan Lightpen
SVS - I only added the NTSC bit to the two values that were being stored to $FF07. One value is stored for the menu screen, the other for the drawing screen.
Mosh - I could steal one of the childrens' fat markers for a housing, but I'm afraid that they would notice. If I use a 'standard' pen housing, the light is too wide to fit close to the end (where the ball of the pen comes out to write).
I'll wait a couple of days to see if anyone else has any experience with this before I do any cutting or modifying.
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Posted By
MIK
on 2005-02-21
09:02:29
 | Re: Trojan Lightpen
james a long time ago, far, far away......
Umm  I did come across a site that showed how to make the pens..Could be an idea to find out what components are used. If cheap make a new one and see what results you get?
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Posted By
Plus4Vampyre
on 2005-02-22
05:32:58
 | Re: Trojan Lightpen
James I would like to help you I have a ntsc machine and a trojan light pen here. If you send me the d64 image, I could test the software. Provided that I find some time on sunday I will do the test, but I can not promise it.
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Posted By
JamesC
on 2005-02-25
07:58:13
| Re: Trojan Lightpen
Vampyre, I'll upload the .prg to cbm264.com this evening. Anyone who wishes to try it is welcome to do so.
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Posted By
JamesC
on 2005-02-26
00:01:30
| Re: Trojan Lightpen
The Trojan Lightpen software that I converted to NTSC has been posted to http://www.cbm264.com for anyone who wishes to test it.
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