SirNickity wrote:

I really can't understand why people still do this hack. They still manufacture drop-in replacements, and there are no shortage of DIY boards to adapt the equivalent external-battery package to that integrated-battery PDIP form factor. Why go to the trouble of mutilating a dead one when there are so many better options readily available? It doesn't make any sense.

Because I have a dremel, a bunch of coin cells, several coin holders, and soldering gear aplenty, and this have job is like 30-40 minutes of work and costs me pennies, whereas a new RTC chip would cost me $20 plus shipping time, and mine are much prettier than the pic I posted.

I also feel like a battery I can't see is an acid hazard waiting to happen, and I have nightmares of CPS2 arcade boards ravaged by battery acid.

I guess I didn't expect so many people to have a stock of coin cell holders. I figure, if you have to order a part anyway, just do it right. To each their own, I guess, but it just makes the poor motherboard look like it got into a knife fight. 😉

DNSDies wrote:

I also feel like a battery I can't see is an acid hazard waiting to happen, and I have nightmares of CPS2 arcade boards ravaged by battery acid.

But it is really the opposite - an exposed battery is going to do damage if it leaks, one potted in plastic is not

artiemog wrote:

I've seen some rumours floating around that the replacements aren't 100% compatible with all designs that used the old chips, so […]
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SirNickity wrote:

I really can't understand why people still do this hack. They still manufacture drop-in replacements, and there are no shortage of DIY boards to adapt the equivalent external-battery package to that integrated-battery PDIP form factor. Why go to the trouble of mutilating a dead one when there are so many better options readily available? It doesn't make any sense.

I've seen some rumours floating around that the replacements aren't 100% compatible with all designs that used the old chips, so it may be paranoia. It also seems like a lot of people just aren't aware that the new chips exist, but information about the hack has circulated around a lot.

I found the replacement chip to be an excellent solution though. I got a DS12887+, which is Maxim's current replacement for the DS1287, and installed it on a 486SC-P Rev. D2 motherboard yesterday (along with a socket! Curse this cheap motherboard manufacturer for not socketing a chip with a battery inside...). Worked like a charm, first try. I will admit to being very careful while removing the old chip in case it turned out I would have to perform the hack, though.

Old chip:

New chip installed on the motherboard:

Good work, you're doing it right

maxtherabbit wrote:

Good work, you're doing it right

Just in case you haven't gotten the message yet, there is no one "right" in this situation.

precaud wrote:

maxtherabbit wrote:

Good work, you're doing it right

Just in case you haven't gotten the message yet, there is no one "right" in this situation.

Hello.
Another question with few answers.
Was it a simple Li battery or a Li accu in the dallas?
I juste worked on a clone, a M48T86PCI , access is on the small side opposed to the pin1 point.
After liberating the two pins and cuting the (+) from the battery, I still get some voltage when the pc is running. So I prefered to put a 3.8v accumulator than a Li classic battery without any diode for security.
Does someone have some good informations ?