Subject: Re: [stella] EPROM variations From: Bob Colbert <retroware@xxxxxxxxxxxxx> Date: Mon, 22 Jun 1998 07:36:36 -0500 |
At 01:44 AM 6/22/98 -0700, you wrote: > >Could someone give me a lecture on 2732 EPROM types? > >I have an unreleased 2600 game to read in (by lending out my EPROM >programmer to the author) and it is labelled: > >D2732A-2 Generally, all chips labeled 2732 should be able to be read in as a standard 2732. The difference lies in the way the chips are programmed. Different flavors of 2732s use different programming voltages. Usually, the number after the EPROM type is the speed of the EPROM. The speed is indicated in milliseconds, and is different from microprocessor speed inasmuch as the EPROM doesn't DO anything, but the speed indicates how long it takes for the data to become stable once the address lines have been set. It's just like memory speed. With that said, I don't know what the 2 indicates :) The numbers are usually much bigger, in the 100 to 200 range I believe. Bob -- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/stella.html
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