Subject: Re: [stella] EPROMs From: "B. Watson" <atari@xxxxxxxxxxxxxx> Date: Mon, 3 Sep 2001 19:57:58 -0400 (EDT) |
On Mon, 3 Sep 2001, Chris Wilkson wrote: > On Mon, 3 Sep 2001, B. Watson wrote: > > > Does anyone make a development cart that can use 27c256b's? > > The 27c256 is the specific chip that my board uses, though it can > fit a 27c128 with no modification needed. > > -Chris Ah, excellent... now if only I could *erase* the 27c256's.. 1/2 hour under a UV lamp didn't do it. The UV lamp I'm using, though, was made for something else (growing plants indoors, maybe? or for keeping pet reptiles warm & happy?) so it's probably never going to work... I'll leave them in there until I can't stand to wait any more (4-5 hours probably) and hopefully they'll be erased, or at least not permanently damaged. I've also found another 27256-like chip on an old SCSI controller, the part number is NM27256Q and the manufacturer's mark looks exactly like the world war II `SS' symbol, only mirrored and rotated 90 degrees.. like this: /\/ /\/ ...I've got a bunch of manufacturers and part numbers listed in the manual, so if I knew who the manufacturer was, I could maybe find out the Vpp.. though the way this thing works, you just get a menu of part numbers and it never tells you what voltage goes with what part number. Either I've fried 4 2716's, or they were bad to begin with. The 27C256B's will read and program, so if I can get them to erase, I have 4 32K EPROMs I can program and put in carts (but I don't really have 4 carts I want to destroy) Brian --- If a trainstation is the place where trains stop, what is a workstation? - Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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