Acorn Arcade forums: Programming: User/Analogue port
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User/Analogue port |
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mookie (14:58 24/12/2006)
VincceH (16:11 24/12/2006)
mookie (16:27 24/12/2006)
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John Lindley |
Message #96232, posted by mookie at 14:58, 24/12/2006 |
Member
Posts: 6
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Finally, after a long break there are Acorn computers in my house again, thanks to a wonderful job lot purchase. The reason for the return is to use them in a computer control project, and because I still haven't found a windows/linux text editor I really like.
The question I have is this, I was lucky enough for one of the machines to include a user/analogue port and I'm looking to use this as the basis of the control. Possibly combined with the parallel port, but I digress. Accessing the cardis straightforward under BASIC but I was hoping to be able to use C as the osoftware could end up as something rather large. Do you know of any wrapper or interface to access the ADVAL command from C?
Sorry for the ramble, it just feels nice to be talking about acorns agains.
John Lindley |
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VinceH |
Message #96239, posted by VincceH at 16:11, 24/12/2006, in reply to message #96232 |
 Lowering the tone since the dawn of time
Posts: 1600
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You 'simply' need to understand how to access the user/analogue port via SWI calls, or via a library which provides a nice wrapper for them. I don't know for certain, but I'd hazzard guess that it will either be via OS_Word or OS_Byte. |
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John Lindley |
Message #96243, posted by mookie at 16:27, 24/12/2006, in reply to message #96239 |
Member
Posts: 6
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I was happy with the SWI for the user port, it's reading the analogue side that seems trickier as it doesn't use an OS_BYTE call but a call to ADVAL which is a little more specific and as far as I can see BASIC specific. |
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Acorn Arcade forums: Programming: User/Analogue port |
