Subject: Re: [stella] 7800 programs -- potential problems? From: Tennessee Carmel-Veilleux <veilleux@xxxxxxxxx> Date: Wed, 19 Jan 2000 11:06:23 -0500 (EST) |
On Wed, 19 Jan 2000, Chris Wilkson wrote: > > I was probably one of the people who said "don't do it". I stand by that. > Even for you, Kevin. :P > > Seriously, now...why go to all that trouble? Why not just replace the rom > with a non-domestic chip? I'm not as knowledgable about the 7800...is there > any reason that this is difficult, other than acquiring a European chip? > The main reason would be that a 74LS/HC244 costs less than 75 cents, is installed easily, and could work. I have made my electronic equipment suffer FAR MORE than what a 74LS244 does to a bus, and they still work. Old electronics means tough electronics. Those things are pretty durable, and NMOS isn't that fickly on I/O shorts/races unless you send a voltage much larger than 5V on the lines. Actually, isn't bus conflict a little like that ? And yet it doesn't seem to affect anything when you do bus conflict with the wrong 'fix-up' value in the ROM on a homemade cart (dunno about the Atari, but on the NES, it doesn't do any form of damage that I know of). Regards, -- Tennessee Carmel-Veilleux (Coordonator of Digital Meltdown) veilleux@xxxxxxxxx (www.ameth.org/~veilleux) ICQ ID : 8604827 Support Linux ! (www.linux.org;www.gnu.org) 1.99$ CD->(www.cheapbytes.com) ||*|| This message was written in Canada / Ce message a ete ecrit au Canada -- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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