Path: utzoo!attcan!telly!problem!compus!lethe!yunexus!ists!helios.physics.utoronto.ca!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!apple!usc!samsung!news.cs.indiana.edu!news.nd.edu!mentor.cc.purdue.edu!descartes.math.purdue.edu!wilker From: wilker@descartes.math.purdue.edu (Clarence Wilkerson) Newsgroups: sci.electronics Subject: Re: Z80 computer displays Message-ID: <6506@mentor.cc.purdue.edu> Date: 21 Feb 91 15:17:47 GMT References: <1991Feb14.045000.25624@ritcsh.csh.rit.edu> Sender: news@mentor.cc.purdue.edu Reply-To: wilker@descartes.math.purdue.edu (Clarence Wilkerson) Lines: 6 The IBM displays are memory mapped. The simplest model, the monochrome TTL card, has 4k of memory, with alternating "attributes" and characters. I suspect that one could use a 8255 parallel port to simulate the PC bus well enough to drive one of these. Clarence Wilkerson Brought to you by Super Global Mega Corp .com