Re: 8088 and 610 saga continues...

Date: Fri, 28 Jan 2011 20:50:28 +0100
Message-ID: <>
Hallo Michał,

> But probably the address is visible on the address bus everywhere?

Yes, even it is an I/O operation or a ROM access, the multiplexed 
addresses are fed to the 6509 board. In short: RAS is either 
generated by a memory read or write, or by circuit where OSC and 
CLK are involved (refresh?). And now the weird thing: if RAS is 
generated, CAS is generated as well! Thus even if the RAS has been 
generated by the refresh circuit.
And as reading the ROM is a memory access as well, even then RAS 
and CAS are generated. 

   / __|__
  / /  |_/     Groetjes, Ruud Baltissen
  \ \__|_\

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Received on 2011-01-28 20:00:14

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