Subject:
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Expansion (infinity and beyond !!!)
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 5 Nov 1997 16:55:30 GMT
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Original-From:
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Bill Coghill <BILL@ALTAUDIO.EDNET.CO.stopspamUK>
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Viewed:
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1313 times
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Dear All,
OK people, Challenge time while Freds away !!
I am trying to work out some code (without the aid of a HandyBoard !)
My C is a bit limited, so any help would be gratefully received.
I would like to add another 74HC374 to the board, with its clock line tied
to Y0, as mentioned in the FAQ.
I think that by writing in the range $4000-$4fff I can enable the Y0 selector
on the expansion bus. How do the values after the 4 effect the outputs ?
So if I used the following code I should see one of the LED's accross the 8
output
pins of the new HC374 light up (hopefully the one on D7 !)
poke(0x4fff,0x80)
Would this work ?
TIA.
_________________________________________________________________________
Bill Coghill
http://www.ednet.co.uk/~bill_altaudio/althome.html
Alternative Audio EMail to :
Bill@AltAudio.Ednet.co.uk
33 Lauderdale Street Office Phone/Fax : +44 (0) 131
466 0176
Edinburgh, If Faxing please phone first !
EH9 1DE, Scotland, UK Mobile Phone/Messaging +44 (0)7050 321034
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