Interfacing an ST

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1 total messages Started by Doug Collinge Thu, 12 Sep 1985 23:23

#1035

Author: Doug Collinge
Date: Thu, 12 Sep 1985 23:23

20 lines
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I am interested in interfacing some magic hardware to an ST.
I see two possibilities: the DMA port and the cartridge slot.
However, this hardware needs to be written to and 
>>>>>>>>>> the cartridge slot does not have R/W! <<<<<<<<<<
I couldn't believe this when I saw it but it's true.  However,
this can be probably be overcome by using a high-order address
line as R/W and agreeing to write only to one half of the
address space and to read only from the other half.  See any
problems with this?  Excepting "Yeccchhh!", of course.
The problem with the DMA port is that I don't know how it works.
Can anyone enlighten me?  DMA would be nice for this particular
hardware.
-- 
		Doug Collinge
		School of Music, University of Victoria,
		PO Box 1700, Victoria, B.C.,
		Canada,  V8W 2Y2  
		decvax!nrl-css!uvicctr!collinge
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		ubc-vision!uvicctr!collinge

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