Yes, that minus 5VDC is a challenge for modern programmers...hence the reason we are all buying up Data I/O 29's with UniPaks! John :-#)# At 3:57 PM -0800 1/3/05, Paul Swan wrote:
Hi,
Most modern EPROM programmers start at 2716 for a reason - the 2708 needs three power supplies to operate it and the 2716 and later run on at most two supplies (the TI one excepted).
Before going to the trouble, it'd be worth asking if their programmer has three supplies. More than likely it does not :-(
I was lucky enough to pick up an old 70's EPROM programmer that is able to do 2708 (and really old stuff below), used mostly for Zaccaria games.
Regards,
Paul.
-----Original Message----- From: techtoolslist-bounces@flippers.com [mailto:techtoolslist-bounces@flippers.com]On Behalf Of joemagiera Sent: Monday, January 03, 2005 3:34 PM To: techtoolslist@flippers.com Subject: [Techtoolslist] 2708 help - Data sheet, programming specs, other...
I own/use an EETools Top Max EPROM programmer. It's pretty versatile, however it does not do 2508's or 2708's. I contacted their support and they appear to be fairly customer responsive. They told me that they would update/modify their software to support any device that the hardware is physically able to do. I would like to take them up on their offer. However I am having difficulties meeting their requirements of supporting a currently unsupported chip type, which is:
I submit 2 of each chip type requested I submit either documentation or web link, etc., of the data sheet and the programming specifications of the chip types requested.
For those of you unfamiliar with the Top Max, they have went the route of making it a manufacturer priority based device. That means they don't just list 2732's, 2764's, etc.. They list the manufacturer first, and then the exact specific chip number/type from that manufacturer. What that also means on a new chip support request, is that the manufacturer of chips submitted must be the same as the documentation provided.
Now for the help request: Can any of you identify the manufacturer of this particular 2708: http://www.joesarcade.com/joem/2708/
As I look at the pics again, on the front pic, could that be an "S" to the left of the 7812, which would stand for Signetics (now Phillips)?
If I can figure out the manufacturer, I can pester them for the data sheet and programming specs. Even if they are long time non-supported, I've found if you bother a company enough, they will usually eventually hand you off to some old timer there that can dig up the info. But, if any of you might have those documents on hand, and can scan and post or email, that would be great. Thanks,
Joe
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