Posted By
Chicken
on 2016-03-09
05:18:55
 |  Re: Light pen and TED
All documents I've seen state that the lightpen interrupt is not implemented. I'm not sure why that bit was called "lightpen" then anyway. Maybe because it's the same bit as on C64 (I haven't checked that)?
There are at least two lightpen reviews in Compute mit (most likely in the C16 special issues). One is on the TROJAN lightpen, the other one on the OPTELPEN. At least the former mentioned some technical issues a lightpen has to face on a C16. I'm pretty sure it's about the missing interrupt.
SVS: You could check the software coming with the TROJAN lightpen to make sure it does not use that bit.
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