how can i upgrade the ram chips on the sega gen 1 model / or any model ?
ExCyber said:Upgrade them in what sense? IIRC, they are pseudo-SRAM with a strange pinout on the early models, but it's been a while since I've looked at them.
Chilly Willy said:Look at the ram chips currently on the PCB. Then go to the net and find chips that are compatible. If you need more instruction than that, you should probably take it to someone who knows what they're doing.
ps3repair1981 said:ok but i am not a programer at all really . what kind of equipment i need to add the reflash the old chips over to the new ones that is really my question ?
Chilly Willy said:This isn't a job for a programmer - at no point will changing the ram require writing any code.
This is a job for an electrical engineer... you need to ID and desolder the old ram chips, then solder in new compatible ones. To desolder the chips, you need a soldering iron and a solder sucker (although you can also use solder wick, it won't do as good a job as a sucker). To solder in the new ones, you need a soldering iron and solder. These items will run you between $50 and $100 on the low end, and several hundred dollars on the high end. You'll also need to practice, so count on destroying a several boards while you develop the skills needed.
Seriously, Dude, this is not something you should be doing on your own if you don't know what you're doing. Take it to someone who does, and already has all the right equipment. Not having the equipment, or even knowing what is required, should be a BIG TIP that you shouldn't be attempting it yourself.
ps3repair1981 said:ok thank you . but i am really good doing soldering . see what i do i do repair ps3 and psp but i want to also go into fixing the old systems .
ExCyber said:It's been some years since I looked at this, but did those chips actually have muxed address pins like DRAM? Otherwise in principle it would make sense to just cut the crap and replace them with SRAM, since modern PSRAMs are mostly high-density low-voltage chips made for cell phones.
Any chance you can refresh my memory on this? (but wait, that shouldn't be necessary)
Chilly Willy said:No, they're usually nothing like DRAM. They're actually usually compatible with SRAM packages, but the OP should check these things directly by looking up the chip datasheets to be certain.
ps3repair1981 said:is there a way if i put new chips do i have to program the sega bios ???