Re: Help on adding I/O chips

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1 total messages Started by jhs Mon, 26 May 1986 23:59

#246

Author: jhs
Date: Mon, 26 May 1986 23:59

9 lines
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A friend of a friend designed a multi-function I/O board for the 800XL
recently.  Looking at the schematic diagram of the address decoding section,
it looks as though the region around $D100 - D1FF is probably pretty safe.
He decodes this whole block as though he plans to be able to use it for many
different devices.  I might be able to get more data on what he learned while
researching the project.

John Sangster
jhs@mitre-bedford.arpa

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